CVE-2024-26766

{"dataType": "CVE_RECORD", "cveMetadata": {"cveId": "CVE-2024-26766", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-19T14:20:24.173Z", "datePublished": "2024-04-03T17:00:48.642Z", "dateUpdated": "2026-08-05T11:27:06.552Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:27:06.552Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nIB/hfi1: Fix sdma.h tx->num_descs off-by-one error\n\nUnfortunately the commit `fd8958efe877` introduced another error\ncausing the `descs` array to overflow. This reults in further crashes\neasily reproducible by `sendmsg` system call.\n\n[ 1080.836473] general protection fault, probably for non-canonical address 0x400300015528b00a: 0000 [#1] PREEMPT SMP PTI\n[ 1080.869326] RIP: 0010:hfi1_ipoib_build_ib_tx_headers.constprop.0+0xe1/0x2b0 [hfi1]\n--\n[ 1080.974535] Call Trace:\n[ 1080.976990] <TASK>\n[ 1081.021929] hfi1_ipoib_send_dma_common+0x7a/0x2e0 [hfi1]\n[ 1081.027364] hfi1_ipoib_send_dma_list+0x62/0x270 [hfi1]\n[ 1081.032633] hfi1_ipoib_send+0x112/0x300 [hfi1]\n[ 1081.042001] ipoib_start_xmit+0x2a9/0x2d0 [ib_ipoib]\n[ 1081.046978] dev_hard_start_xmit+0xc4/0x210\n--\n[ 1081.148347] __sys_sendmsg+0x59/0xa0\n\ncrash> ipoib_txreq 0xffff9cfeba229f00\nstruct ipoib_txreq {\n txreq = {\n list = {\n next = 0xffff9cfeba229f00,\n prev = 0xffff9cfeba229f00\n },\n descp = 0xffff9cfeba229f40,\n coalesce_buf = 0x0,\n wait = 0xffff9cfea4e69a48,\n complete = 0xffffffffc0fe0760 <hfi1_ipoib_sdma_complete>,\n packet_len = 0x46d,\n tlen = 0x0,\n num_desc = 0x0,\n desc_limit = 0x6,\n next_descq_idx = 0x45c,\n coalesce_idx = 0x0,\n flags = 0x0,\n descs = {{\n qw = {0x8024000120dffb00, 0x4} # SDMA_DESC0_FIRST_DESC_FLAG (bit 63)\n }, {\n qw = { 0x3800014231b108, 0x4}\n }, {\n qw = { 0x310000e4ee0fcf0, 0x8}\n }, {\n qw = { 0x3000012e9f8000, 0x8}\n }, {\n qw = { 0x59000dfb9d0000, 0x8}\n }, {\n qw = { 0x78000e02e40000, 0x8}\n }}\n },\n sdma_hdr = 0x400300015528b000, <<< invalid pointer in the tx request structure\n sdma_status = 0x0, SDMA_DESC0_LAST_DESC_FLAG (bit 62)\n complete = 0x0,\n priv = 0x0,\n txq = 0xffff9cfea4e69880,\n skb = 0xffff9d099809f400\n}\n\nIf an SDMA send consists of exactly 6 descriptors and requires dword\npadding (in the 7th descriptor), the sdma_txreq descriptor array is not\nproperly expanded and the packet will overflow into the container\nstructure. This results in a panic when the send completion runs. The\nexact panic varies depending on what elements of the container structure\nget corrupted. The fix is to use the correct expression in\n_pad_sdma_tx_descs() to test the need to expand the descriptor array.\n\nWith this patch the crashes are no longer reproducible and the machine is\nstable."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The overflow is driven entirely by the local sender's skb layout (number of page frags and total length), reached via an ordinary `sendmsg`/`writev` syscall on a socket routed over the hfi1 IPoIB netdev, as the reporter's `__sys_sendmsg` \u2192 `ipoib_start_xmit` \u2192 `hfi1_ipoib_send` trace shows. A remote peer cannot dictate the local skb fragment layout, so this is a local syscall vector, not network.\nAC:L - There is no race and no memory-layout dependency: the attacker deterministically chooses 4 page fragments plus a payload length not divisible by 4, which makes `num_desc` equal `desc_limit` exactly when padding is appended. Every attempt with that shape overflows `descs[6]`.\nPR:L - Any unprivileged local account can send datagrams out an IPoIB interface; no capability, no `/dev/infiniband` or `/dev/hfi1` access, and no namespace trickery is required. The `hfi1_ipoib_send` path is reached from the generic `dev_hard_start_xmit` transmit path available to all users.\nUI:N - The attacker's own `sendmsg` call triggers the overflow and the subsequent completion/reuse of the corrupted txreq; no administrator or victim action is involved.\nS:U - The out-of-bounds write stays within kernel memory managed by the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The overflow clobbers `ipoib_txreq.sdma_hdr`, a pointer that is later handed to `sdma_txadd_kvaddr()`/`dma_map_single()` as the packet-header DMA source, so corrupted-pointer contents can be DMA'd onto the fabric; more generally an attacker-triggered out-of-bounds write over adjacent pointer fields is memory corruption leverageable for disclosure.\nI:H - This is a straight out-of-bounds write of a 32-byte descriptor past `descs[NUM_DESC]` into the container structure, overwriting `sdma_hdr`, `priv` and `txq` (and `qp`/`wqe`/`ss` or a `list_head` in the verbs and user_sdma containers), which then serve as write targets and list-manipulation operands.\nA:H - The reporter reproduced an immediate general protection fault in `hfi1_ipoib_build_ib_tx_headers()` from the corrupted `sdma_hdr`, and the NULLed `txq`/`priv` guarantee a NULL dereference in the completion path \u2014 a repeatable kernel panic from an unprivileged syscall."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/infiniband/hw/hfi1/sdma.c"], "versions": [{"version": "d1c1ee052d25ca23735eea912f843bc7834781b4", "lessThan": "115b7f3bc1dce590a6851a2dcf23dc1100c49790", "status": "affected", "versionType": "git"}, {"version": "40ac5cb6cbb01afa40881f78b4d2f559fb7065c4", "lessThan": "5833024a9856f454a964a198c63a57e59e07baf5", "status": "affected", "versionType": "git"}, {"version": "6cf8f3d690bb5ad31ef0f41a6206ecf5a068d179", "lessThan": "3f38d22e645e2e994979426ea5a35186102ff3c2", "status": "affected", "versionType": "git"}, {"version": "bd57756a7e43c7127d0eca1fc5868e705fd0f7ba", "lessThan": "47ae64df23ed1318e27bd9844e135a5e1c0e6e39", "status": "affected", "versionType": "git"}, {"version": "eeaf35f4e3b360162081de5e744cf32d6d1b0091", "lessThan": "52dc9a7a573dbf778625a0efca0fca55489f084b", "status": "affected", "versionType": "git"}, {"version": "fd8958efe8779d3db19c9124fce593ce681ac709", "lessThan": "a2fef1d81becf4ff60e1a249477464eae3c3bc2a", "status": "affected", "versionType": "git"}, {"version": "fd8958efe8779d3db19c9124fce593ce681ac709", "lessThan": "9034a1bec35e9f725315a3bb6002ef39666114d9", "status": "affected", "versionType": "git"}, {"version": "fd8958efe8779d3db19c9124fce593ce681ac709", "lessThan": "e6f57c6881916df39db7d95981a8ad2b9c3458d6", "status": "affected", "versionType": "git"}, {"version": "0ef9594936d1f078e8599a1cf683b052df2bec00", "status": "affected", "versionType": "git"}, {"version": "4.19.291", "lessThan": "4.19.308", "status": "affected", "versionType": "semver"}, {"version": "5.4.251", "lessThan": "5.4.270", "status": "affected", "versionType": "semver"}, {"version": "5.10.188", "lessThan": "5.10.211", "status": "affected", "versionType": "semver"}, {"version": "5.15.99", "lessThan": "5.15.150", "status": "affected", "versionType": "semver"}, {"version": "6.1.16", "lessThan": "6.1.80", "status": "affected", "versionType": "semver"}, {"version": "6.2.3", "lessThan": "6.3", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/infiniband/hw/hfi1/sdma.c"], "versions": [{"version": "6.3", "status": "affected"}, {"version": "0", "lessThan": "6.3", "status": "unaffected", "versionType": "semver"}, {"version": "4.19.308", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.270", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.211", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.150", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.80", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.19", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.7.7", "lessThanOrEqual": "6.7.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.8", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19.291", "versionEndExcluding": "4.19.308"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4.251", "versionEndExcluding": "5.4.270"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10.188", "versionEndExcluding": "5.10.211"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15.99", "versionEndExcluding": "5.15.150"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.16", "versionEndExcluding": "6.1.80"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.6.19"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.7.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/115b7f3bc1dce590a6851a2dcf23dc1100c49790"}, {"url": "https://git.kernel.org/stable/c/5833024a9856f454a964a198c63a57e59e07baf5"}, {"url": "https://git.kernel.org/stable/c/3f38d22e645e2e994979426ea5a35186102ff3c2"}, {"url": "https://git.kernel.org/stable/c/47ae64df23ed1318e27bd9844e135a5e1c0e6e39"}, {"url": "https://git.kernel.org/stable/c/52dc9a7a573dbf778625a0efca0fca55489f084b"}, {"url": "https://git.kernel.org/stable/c/a2fef1d81becf4ff60e1a249477464eae3c3bc2a"}, {"url": "https://git.kernel.org/stable/c/9034a1bec35e9f725315a3bb6002ef39666114d9"}, {"url": "https://git.kernel.org/stable/c/e6f57c6881916df39db7d95981a8ad2b9c3458d6"}], "title": "IB/hfi1: Fix sdma.h tx->num_descs off-by-one error", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"title": "CISA ADP Vulnrichment", 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A remote peer cannot dictate the local skb fragment layout, so this is a local syscall vector, not network.\nAC:L - There is no race and no memory-layout dependency: the attacker deterministically chooses 4 page fragments plus a payload length not divisible by 4, which makes `num_desc` equal `desc_limit` exactly when padding is appended. Every attempt with that shape overflows `descs[6]`.\nPR:L - Any unprivileged local account can send datagrams out an IPoIB interface; no capability, no `/dev/infiniband` or `/dev/hfi1` access, and no namespace trickery is required. The `hfi1_ipoib_send` path is reached from the generic `dev_hard_start_xmit` transmit path available to all users.\nUI:N - The attacker's own `sendmsg` call triggers the overflow and the subsequent completion/reuse of the corrupted txreq; no administrator or victim action is involved.\nS:U - The out-of-bounds write stays within kernel memory managed by the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The overflow clobbers `ipoib_txreq.sdma_hdr`, a pointer that is later handed to `sdma_txadd_kvaddr()`/`dma_map_single()` as the packet-header DMA source, so corrupted-pointer contents can be DMA'd onto the fabric; more generally an attacker-triggered out-of-bounds write over adjacent pointer fields is memory corruption leverageable for disclosure.\nI:H - This is a straight out-of-bounds write of a 32-byte descriptor past `descs[NUM_DESC]` into the container structure, overwriting `sdma_hdr`, `priv` and `txq` (and `qp`/`wqe`/`ss` or a `list_head` in the verbs and user_sdma containers), which then serve as write targets and list-manipulation operands.\nA:H - The reporter reproduced an immediate general protection fault in `hfi1_ipoib_build_ib_tx_headers()` from the corrupted `sdma_hdr`, and the NULLed `txq`/`priv` guarantee a NULL dereference in the completion path \u2014 a repeatable kernel panic from an unprivileged syscall."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "d1c1ee052d25ca23735eea912f843bc7834781b4", "lessThan": "115b7f3bc1dce590a6851a2dcf23dc1100c49790", "versionType": "git"}, {"status": "affected", "version": "40ac5cb6cbb01afa40881f78b4d2f559fb7065c4", "lessThan": "5833024a9856f454a964a198c63a57e59e07baf5", "versionType": "git"}, {"status": "affected", "version": "6cf8f3d690bb5ad31ef0f41a6206ecf5a068d179", "lessThan": "3f38d22e645e2e994979426ea5a35186102ff3c2", "versionType": "git"}, {"status": "affected", "version": "bd57756a7e43c7127d0eca1fc5868e705fd0f7ba", "lessThan": "47ae64df23ed1318e27bd9844e135a5e1c0e6e39", "versionType": "git"}, {"status": "affected", "version": "eeaf35f4e3b360162081de5e744cf32d6d1b0091", "lessThan": "52dc9a7a573dbf778625a0efca0fca55489f084b", "versionType": "git"}, {"status": "affected", "version": "fd8958efe8779d3db19c9124fce593ce681ac709", "lessThan": "a2fef1d81becf4ff60e1a249477464eae3c3bc2a", "versionType": "git"}, {"status": "affected", "version": "fd8958efe8779d3db19c9124fce593ce681ac709", "lessThan": "9034a1bec35e9f725315a3bb6002ef39666114d9", "versionType": "git"}, {"status": "affected", "version": "fd8958efe8779d3db19c9124fce593ce681ac709", "lessThan": "e6f57c6881916df39db7d95981a8ad2b9c3458d6", "versionType": "git"}, {"status": "affected", "version": "0ef9594936d1f078e8599a1cf683b052df2bec00", "versionType": "git"}, {"status": "affected", "version": "4.19.291", "lessThan": "4.19.308", "versionType": "semver"}, {"status": "affected", "version": "5.4.251", "lessThan": "5.4.270", "versionType": "semver"}, {"status": "affected", "version": "5.10.188", "lessThan": "5.10.211", "versionType": "semver"}, {"status": "affected", "version": "5.15.99", "lessThan": "5.15.150", "versionType": "semver"}, {"status": "affected", "version": "6.1.16", "lessThan": "6.1.80", "versionType": "semver"}, {"status": "affected", "version": "6.2.3", "lessThan": "6.3", "versionType": "semver"}], "programFiles": ["drivers/infiniband/hw/hfi1/sdma.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.3"}, {"status": "unaffected", "version": "0", "lessThan": "6.3", "versionType": "semver"}, {"status": "unaffected", "version": "4.19.308", "versionType": "semver", "lessThanOrEqual": "4.19.*"}, {"status": "unaffected", "version": "5.4.270", "versionType": "semver", "lessThanOrEqual": "5.4.*"}, {"status": "unaffected", "version": "5.10.211", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.150", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.80", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.19", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.7.7", "versionType": "semver", "lessThanOrEqual": "6.7.*"}, {"status": "unaffected", "version": "6.8", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/infiniband/hw/hfi1/sdma.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/115b7f3bc1dce590a6851a2dcf23dc1100c49790"}, {"url": "https://git.kernel.org/stable/c/5833024a9856f454a964a198c63a57e59e07baf5"}, {"url": "https://git.kernel.org/stable/c/3f38d22e645e2e994979426ea5a35186102ff3c2"}, {"url": "https://git.kernel.org/stable/c/47ae64df23ed1318e27bd9844e135a5e1c0e6e39"}, {"url": "https://git.kernel.org/stable/c/52dc9a7a573dbf778625a0efca0fca55489f084b"}, {"url": "https://git.kernel.org/stable/c/a2fef1d81becf4ff60e1a249477464eae3c3bc2a"}, {"url": "https://git.kernel.org/stable/c/9034a1bec35e9f725315a3bb6002ef39666114d9"}, {"url": "https://git.kernel.org/stable/c/e6f57c6881916df39db7d95981a8ad2b9c3458d6"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nIB/hfi1: Fix sdma.h tx->num_descs off-by-one error\n\nUnfortunately the commit `fd8958efe877` introduced another error\ncausing the `descs` array to overflow. This reults in further crashes\neasily reproducible by `sendmsg` system call.\n\n[ 1080.836473] general protection fault, probably for non-canonical address 0x400300015528b00a: 0000 [#1] PREEMPT SMP PTI\n[ 1080.869326] RIP: 0010:hfi1_ipoib_build_ib_tx_headers.constprop.0+0xe1/0x2b0 [hfi1]\n--\n[ 1080.974535] Call Trace:\n[ 1080.976990] <TASK>\n[ 1081.021929] hfi1_ipoib_send_dma_common+0x7a/0x2e0 [hfi1]\n[ 1081.027364] hfi1_ipoib_send_dma_list+0x62/0x270 [hfi1]\n[ 1081.032633] hfi1_ipoib_send+0x112/0x300 [hfi1]\n[ 1081.042001] ipoib_start_xmit+0x2a9/0x2d0 [ib_ipoib]\n[ 1081.046978] dev_hard_start_xmit+0xc4/0x210\n--\n[ 1081.148347] __sys_sendmsg+0x59/0xa0\n\ncrash> ipoib_txreq 0xffff9cfeba229f00\nstruct ipoib_txreq {\n txreq = {\n list = {\n next = 0xffff9cfeba229f00,\n prev = 0xffff9cfeba229f00\n },\n descp = 0xffff9cfeba229f40,\n coalesce_buf = 0x0,\n wait = 0xffff9cfea4e69a48,\n complete = 0xffffffffc0fe0760 <hfi1_ipoib_sdma_complete>,\n packet_len = 0x46d,\n tlen = 0x0,\n num_desc = 0x0,\n desc_limit = 0x6,\n next_descq_idx = 0x45c,\n coalesce_idx = 0x0,\n flags = 0x0,\n descs = {{\n qw = {0x8024000120dffb00, 0x4} # SDMA_DESC0_FIRST_DESC_FLAG (bit 63)\n }, {\n qw = { 0x3800014231b108, 0x4}\n }, {\n qw = { 0x310000e4ee0fcf0, 0x8}\n }, {\n qw = { 0x3000012e9f8000, 0x8}\n }, {\n qw = { 0x59000dfb9d0000, 0x8}\n }, {\n qw = { 0x78000e02e40000, 0x8}\n }}\n },\n sdma_hdr = 0x400300015528b000, <<< invalid pointer in the tx request structure\n sdma_status = 0x0, SDMA_DESC0_LAST_DESC_FLAG (bit 62)\n complete = 0x0,\n priv = 0x0,\n txq = 0xffff9cfea4e69880,\n skb = 0xffff9d099809f400\n}\n\nIf an SDMA send consists of exactly 6 descriptors and requires dword\npadding (in the 7th descriptor), the sdma_txreq descriptor array is not\nproperly expanded and the packet will overflow into the container\nstructure. This results in a panic when the send completion runs. The\nexact panic varies depending on what elements of the container structure\nget corrupted. The fix is to use the correct expression in\n_pad_sdma_tx_descs() to test the need to expand the descriptor array.\n\nWith this patch the crashes are no longer reproducible and the machine is\nstable."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "4.19.308", "versionStartIncluding": "4.19.291"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.4.270", "versionStartIncluding": "5.4.251"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.211", "versionStartIncluding": "5.10.188"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.150", "versionStartIncluding": "5.15.99"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.80", "versionStartIncluding": "6.1.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.19", "versionStartIncluding": "6.3"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.7.7", "versionStartIncluding": "6.3"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.8", "versionStartIncluding": "6.3"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "6.2.3"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:27:06.552Z"}}}, "cveMetadata": {"cveId": "CVE-2024-26766", "state": "PUBLISHED", "dateUpdated": "2026-08-05T11:27:06.552Z", "dateReserved": "2024-02-19T14:20:24.173Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-04-03T17:00:48.642Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/infiniband/hw/hfi1/sdma.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "115b7f3bc1dce590a6851a2dcf23dc1100c49790", "status": "affected", "version": "d1c1ee052d25ca23735eea912f843bc7834781b4", "versionType": "git"}, {"lessThan": "5833024a9856f454a964a198c63a57e59e07baf5", "status": "affected", "version": "40ac5cb6cbb01afa40881f78b4d2f559fb7065c4", "versionType": "git"}, {"lessThan": "3f38d22e645e2e994979426ea5a35186102ff3c2", "status": "affected", "version": "6cf8f3d690bb5ad31ef0f41a6206ecf5a068d179", "versionType": "git"}, {"lessThan": "47ae64df23ed1318e27bd9844e135a5e1c0e6e39", "status": "affected", "version": "bd57756a7e43c7127d0eca1fc5868e705fd0f7ba", "versionType": "git"}, {"lessThan": "52dc9a7a573dbf778625a0efca0fca55489f084b", "status": "affected", "version": 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"versionType": "semver"}, {"lessThan": "6.1.80", "status": "affected", "version": "6.1.16", "versionType": "semver"}, {"lessThan": "6.3", "status": "affected", "version": "6.2.3", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/infiniband/hw/hfi1/sdma.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.3"}, {"lessThan": "6.3", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "4.19.*", "status": "unaffected", "version": "4.19.308", "versionType": "semver"}, {"lessThanOrEqual": "5.4.*", "status": "unaffected", "version": "5.4.270", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.211", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.150", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.80", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.19", "versionType": "semver"}, {"lessThanOrEqual": "6.7.*", "status": "unaffected", "version": "6.7.7", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.8", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "753EDC06-9ECC-4381-96AF-D76C2CE3AA8F", "versionEndExcluding": "4.19.308", "versionStartIncluding": "4.19.291", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "3E2E173D-B660-495B-9BD7-3288E67DC90C", "versionEndExcluding": "5.4.270", "versionStartIncluding": "5.4.251", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": 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[{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nIB/hfi1: Fix sdma.h tx->num_descs off-by-one error\n\nUnfortunately the commit `fd8958efe877` introduced another error\ncausing the `descs` array to overflow. This reults in further crashes\neasily reproducible by `sendmsg` system call.\n\n[ 1080.836473] general protection fault, probably for non-canonical address 0x400300015528b00a: 0000 [#1] PREEMPT SMP PTI\n[ 1080.869326] RIP: 0010:hfi1_ipoib_build_ib_tx_headers.constprop.0+0xe1/0x2b0 [hfi1]\n--\n[ 1080.974535] Call Trace:\n[ 1080.976990] <TASK>\n[ 1081.021929] hfi1_ipoib_send_dma_common+0x7a/0x2e0 [hfi1]\n[ 1081.027364] hfi1_ipoib_send_dma_list+0x62/0x270 [hfi1]\n[ 1081.032633] hfi1_ipoib_send+0x112/0x300 [hfi1]\n[ 1081.042001] ipoib_start_xmit+0x2a9/0x2d0 [ib_ipoib]\n[ 1081.046978] dev_hard_start_xmit+0xc4/0x210\n--\n[ 1081.148347] __sys_sendmsg+0x59/0xa0\n\ncrash> ipoib_txreq 0xffff9cfeba229f00\nstruct ipoib_txreq {\n txreq = {\n list = {\n next = 0xffff9cfeba229f00,\n prev = 0xffff9cfeba229f00\n },\n descp = 0xffff9cfeba229f40,\n coalesce_buf = 0x0,\n wait = 0xffff9cfea4e69a48,\n complete = 0xffffffffc0fe0760 <hfi1_ipoib_sdma_complete>,\n packet_len = 0x46d,\n tlen = 0x0,\n num_desc = 0x0,\n desc_limit = 0x6,\n next_descq_idx = 0x45c,\n coalesce_idx = 0x0,\n flags = 0x0,\n descs = {{\n qw = {0x8024000120dffb00, 0x4} # SDMA_DESC0_FIRST_DESC_FLAG (bit 63)\n }, {\n qw = { 0x3800014231b108, 0x4}\n }, {\n qw = { 0x310000e4ee0fcf0, 0x8}\n }, {\n qw = { 0x3000012e9f8000, 0x8}\n }, {\n qw = { 0x59000dfb9d0000, 0x8}\n }, {\n qw = { 0x78000e02e40000, 0x8}\n }}\n },\n sdma_hdr = 0x400300015528b000, <<< invalid pointer in the tx request structure\n sdma_status = 0x0, SDMA_DESC0_LAST_DESC_FLAG (bit 62)\n complete = 0x0,\n priv = 0x0,\n txq = 0xffff9cfea4e69880,\n skb = 0xffff9d099809f400\n}\n\nIf an SDMA send consists of exactly 6 descriptors and requires dword\npadding (in the 7th descriptor), the sdma_txreq descriptor array is not\nproperly expanded and the packet will overflow into the container\nstructure. This results in a panic when the send completion runs. The\nexact panic varies depending on what elements of the container structure\nget corrupted. The fix is to use the correct expression in\n_pad_sdma_tx_descs() to test the need to expand the descriptor array.\n\nWith this patch the crashes are no longer reproducible and the machine is\nstable."}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: IB/hfi1: Corrija el error sdma.h tx-&gt;num_descs off-by-one Desafortunadamente, el commit `fd8958efe877` introdujo otro error que provoc\u00f3 que la matriz `descs` se desbordara. Esto da como resultado m\u00e1s fallas f\u00e1cilmente reproducibles mediante la llamada al SYSTEM \"sendmsg\". [ 1080.836473] falla de protecci\u00f3n general, probablemente para direcci\u00f3n no can\u00f3nica 0x400300015528b00a: 0000 [#1] PREEMPT SMP PTI [ 1080.869326] RIP: 0010:hfi1_ipoib_build_ib_tx_headers.constprop.0+0xe1/0x2b0 [hfi1] -- [1080.974535] Seguimiento de llamadas: [ 1080.976990] [ 1081.021929] hfi1_ipoib_send_dma_common+0x7a/0x2e0 [hfi1] [ 1081.027364] hfi1_ipoib_send_dma_list+0x62/0x270 [hfi1] [ 1081.032633] h fi1_ipoib_send+0x112/0x300 [hfi1] [ 1081.042001] ipoib_start_xmit+0x2a9/0x2d0 [ib_ipoib] [ 1081.046978] dev_hard_start_xmit+0xc4/0x210 -- [ 1081.148347] __sys_sendmsg+0x59/0xa0 crash&gt; ipoib_txreq 0xffff9cfeba229f00 struct ipoib_txreq { txreq = { list = { next = 0xffff9cfe ba229f00, anterior = 0xffff9cfeba229f00}, descp = 0xffff9cfeba229f40, coalesce_buf = 0x0, espera = 0xffff9cfea4e69a48, completo = 0xffffffffc0fe0760 , paquete_len = 0x46d, tlen = 0x0, num_desc = 0x0, desc_limit = 0x6, next_descq_idx = 0x45c, coalesce_idx = 0x0, banderas = 0x0 , descs = {{ qw = {0x8024000120dffb00, 0x4} # SDMA_DESC0_FIRST_DESC_FLAG (bit 63) }, { qw = { 0x3800014231b108, 0x4} }, { qw = { 0x310000e4ee0fcf0, 0x8} }, { qw = { 0x3000012e9f8000, 0x8} }, { qw = { 0x59000dfb9d0000, 0x8} }, { qw = { 0x78000e02e40000, 0x8} }} }, sdma_hdr = 0x400300015528b000, &lt;&lt;&lt; puntero no v\u00e1lido en la estructura de solicitud de tx sdma_status = 0x0, SDMA_DESC0_LAST_DESC_FLAG (bit 62) completo = 0x0, priv = 0x0, txq = 0xffff9cfea4e69880, skb = 0xffff9d099809f400 } Si es un SDMA send consta de exactamente 6 descriptores y requiere relleno de dword (en el s\u00e9ptimo descriptor), la matriz de descriptores sdma_txreq no se expande adecuadamente y el paquete se desbordar\u00e1 hacia la estructura del contenedor. Esto produce p\u00e1nico cuando se ejecuta la finalizaci\u00f3n del env\u00edo. El p\u00e1nico exacto var\u00eda dependiendo de qu\u00e9 elementos de la estructura del contenedor se corrompen. La soluci\u00f3n es utilizar la expresi\u00f3n correcta en _pad_sdma_tx_descs() para probar la necesidad de expandir la matriz de descriptores. Con este parche los fallos ya no son reproducibles y la m\u00e1quina est\u00e1 estable."}], "id": "CVE-2024-26766", "lastModified": "2026-08-04T11:17:02.050", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-26766", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-04-03T18:11:09.801717Z", "version": "2.0.3"}}]}, "published": "2024-04-03T17:15:52.683", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/115b7f3bc1dce590a6851a2dcf23dc1100c49790"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3f38d22e645e2e994979426ea5a35186102ff3c2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/47ae64df23ed1318e27bd9844e135a5e1c0e6e39"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/52dc9a7a573dbf778625a0efca0fca55489f084b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5833024a9856f454a964a198c63a57e59e07baf5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9034a1bec35e9f725315a3bb6002ef39666114d9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a2fef1d81becf4ff60e1a249477464eae3c3bc2a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e6f57c6881916df39db7d95981a8ad2b9c3458d6"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/115b7f3bc1dce590a6851a2dcf23dc1100c49790"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3f38d22e645e2e994979426ea5a35186102ff3c2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/47ae64df23ed1318e27bd9844e135a5e1c0e6e39"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/52dc9a7a573dbf778625a0efca0fca55489f084b"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5833024a9856f454a964a198c63a57e59e07baf5"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9034a1bec35e9f725315a3bb6002ef39666114d9"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a2fef1d81becf4ff60e1a249477464eae3c3bc2a"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e6f57c6881916df39db7d95981a8ad2b9c3458d6"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List"], "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List"], "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-193"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: IB/hfi1: Fix sdma.h tx->num_descs off-by-one error", "id": "2273187", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2273187"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-193", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nIB/hfi1: Fix sdma.h tx->num_descs off-by-one error\nUnfortunately the commit `fd8958efe877` introduced another error\ncausing the `descs` array to overflow. This reults in further crashes\neasily reproducible by `sendmsg` system call.\n[ 1080.836473] general protection fault, probably for non-canonical address 0x400300015528b00a: 0000 [#1] PREEMPT SMP PTI\n[ 1080.869326] RIP: 0010:hfi1_ipoib_build_ib_tx_headers.constprop.0+0xe1/0x2b0 [hfi1]\n--\n[ 1080.974535] Call Trace:\n[ 1080.976990] <TASK>\n[ 1081.021929] hfi1_ipoib_send_dma_common+0x7a/0x2e0 [hfi1]\n[ 1081.027364] hfi1_ipoib_send_dma_list+0x62/0x270 [hfi1]\n[ 1081.032633] hfi1_ipoib_send+0x112/0x300 [hfi1]\n[ 1081.042001] ipoib_start_xmit+0x2a9/0x2d0 [ib_ipoib]\n[ 1081.046978] dev_hard_start_xmit+0xc4/0x210\n--\n[ 1081.148347] __sys_sendmsg+0x59/0xa0\ncrash> ipoib_txreq 0xffff9cfeba229f00\nstruct ipoib_txreq {\ntxreq = {\nlist = {\nnext = 0xffff9cfeba229f00,\nprev = 0xffff9cfeba229f00\n},\ndescp = 0xffff9cfeba229f40,\ncoalesce_buf = 0x0,\nwait = 0xffff9cfea4e69a48,\ncomplete = 0xffffffffc0fe0760 <hfi1_ipoib_sdma_complete>,\npacket_len = 0x46d,\ntlen = 0x0,\nnum_desc = 0x0,\ndesc_limit = 0x6,\nnext_descq_idx = 0x45c,\ncoalesce_idx = 0x0,\nflags = 0x0,\ndescs = {{\nqw = {0x8024000120dffb00, 0x4} # SDMA_DESC0_FIRST_DESC_FLAG (bit 63)\n}, {\nqw = { 0x3800014231b108, 0x4}\n}, {\nqw = { 0x310000e4ee0fcf0, 0x8}\n}, {\nqw = { 0x3000012e9f8000, 0x8}\n}, {\nqw = { 0x59000dfb9d0000, 0x8}\n}, {\nqw = { 0x78000e02e40000, 0x8}\n}}\n},\nsdma_hdr = 0x400300015528b000, <<< invalid pointer in the tx request structure\nsdma_status = 0x0, SDMA_DESC0_LAST_DESC_FLAG (bit 62)\ncomplete = 0x0,\npriv = 0x0,\ntxq = 0xffff9cfea4e69880,\nskb = 0xffff9d099809f400\n}\nIf an SDMA send consists of exactly 6 descriptors and requires dword\npadding (in the 7th descriptor), the sdma_txreq descriptor array is not\nproperly expanded and the packet will overflow into the container\nstructure. This results in a panic when the send completion runs. The\nexact panic varies depending on what elements of the container structure\nget corrupted. The fix is to use the correct expression in\n_pad_sdma_tx_descs() to test the need to expand the descriptor array.\nWith this patch the crashes are no longer reproducible and the machine is\nstable.", "A vulnerability was found in the Linux kernel's infiniband hfi1 driver. This issue is caused by the incorrect handling of SDMA descriptors, which can lead to an array overflow and potential memory corruption or crashes."], "name": "CVE-2024-26766", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-04-03T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-26766\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-26766\nhttps://lore.kernel.org/linux-cve-announce/2024040306-CVE-2024-26766-6b6a@gregkh/T"], "statement": "None of the products shipped by Red Hat are affected by this vulnerability.", "threat_severity": "Moderate"}

{}