CVE-2025-39932

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-39932", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T07:20:57.148Z", "datePublished": "2025-10-04T07:30:56.726Z", "dateUpdated": "2026-10-30T12:22:37.422Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:22:37.422Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: let smbd_destroy() call disable_work_sync(&info->post_send_credits_work)\n\nIn smbd_destroy() we may destroy the memory so we better\nwait until post_send_credits_work is no longer pending\nand will never be started again.\n\nI actually just hit the case using rxe:\n\nWARNING: CPU: 0 PID: 138 at drivers/infiniband/sw/rxe/rxe_verbs.c:1032 rxe_post_recv+0x1ee/0x480 [rdma_rxe]\n...\n[ 5305.686979] [ T138] smbd_post_recv+0x445/0xc10 [cifs]\n[ 5305.687135] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687149] [ T138] ? __kasan_check_write+0x14/0x30\n[ 5305.687185] [ T138] ? __pfx_smbd_post_recv+0x10/0x10 [cifs]\n[ 5305.687329] [ T138] ? __pfx__raw_spin_lock_irqsave+0x10/0x10\n[ 5305.687356] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687368] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687378] [ T138] ? _raw_spin_unlock_irqrestore+0x11/0x60\n[ 5305.687389] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687399] [ T138] ? get_receive_buffer+0x168/0x210 [cifs]\n[ 5305.687555] [ T138] smbd_post_send_credits+0x382/0x4b0 [cifs]\n[ 5305.687701] [ T138] ? __pfx_smbd_post_send_credits+0x10/0x10 [cifs]\n[ 5305.687855] [ T138] ? __pfx___schedule+0x10/0x10\n[ 5305.687865] [ T138] ? __pfx__raw_spin_lock_irq+0x10/0x10\n[ 5305.687875] [ T138] ? queue_delayed_work_on+0x8e/0xa0\n[ 5305.687889] [ T138] process_one_work+0x629/0xf80\n[ 5305.687908] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687917] [ T138] ? __kasan_check_write+0x14/0x30\n[ 5305.687933] [ T138] worker_thread+0x87f/0x1570\n...\n\nIt means rxe_post_recv was called after rdma_destroy_qp().\nThis happened because put_receive_buffer() was triggered\nby ib_drain_qp() and called:\nqueue_work(info->workqueue, &info->post_send_credits_work);"}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL"}, "scenarios": [{"lang": "en", "value": "AV:N - The vulnerable teardown path is the client's SMB Direct (RDMA) transport, driven entirely by the remote SMB server peer over iWARP/RoCE/IB \u2014 the peer triggers the disconnect that enters `smbd_destroy()` via `cifs_reconnect()`/`smbd_reconnect()` and controls the receive-credit traffic that requeues `post_send_credits_work`. This matches the established scoring of other client-side smbdirect flaws (e.g. CVE-2026-31609, CVE-2026-31535) as network-reachable.\nAC:L - The attacker owns both sides of the race: it initiates the RDMA disconnect that starts `smbd_destroy()`, it controls how many receive buffers are outstanding (and therefore how many `put_receive_buffer()` \u2192 `queue_work()` requeues `ib_drain_qp()` flushes), and it can force reconnect cycles indefinitely until it wins. The window is not narrow \u2014 the reporter hit it during ordinary rxe testing, and the worker's status check is a TOCTOU that a preempted worker bypasses without any signal or unusual state.\nPR:N - The SMB Direct transport connect/teardown and credit machinery sits below SMB session setup, so no credentials, capability, or account on the target are validated anywhere on the path to `smbd_post_send_credits()`. The remote peer needs no privileges on the client to reset the connection and drive the teardown.\nUI:N - Against an already-established SMB Direct mount \u2014 persistent deployment state, not participation in the compromise \u2014 the attacker completes the whole sequence by resetting the RDMA connection; the client's demultiplex thread enters `smbd_reconnect()` \u2192 `smbd_destroy()` automatically with no victim action.\nS:U - The freed QP, protection domain and receive buffers are all kernel-internal objects belonging to the same security authority as the faulting code. No VM, IOMMU, or sandbox boundary is crossed.\nC:H - This is a use-after-free of the `ib_qp` freed by `rdma_destroy_qp()`, whose contents are read back by `ib_post_recv()`/`ib_post_send()` (`qp->device`, `qp->valid`, queue pointers) along with a stale `sc->ib.pd->local_dma_lkey`; reclaiming that slab lets an attacker read and exfiltrate kernel memory, and stale DMA mappings can expose freed receive buffers.\nI:H - `ib_post_recv()` dispatches through `qp->device->ops.post_recv` \u2014 a function pointer loaded from freed memory \u2014 giving a control-flow hijack primitive once the QP slab is sprayed, and the driver additionally writes a WQE and producer index into the freed ring, yielding a write primitive into reclaimed memory.\nA:H - The observed result is a kernel WARN/oops inside the workqueue worker, and after `sc->ib.qp = NULL` the same path is an outright NULL dereference; either panics the machine under `panic_on_oops` and otherwise wedges the SMB Direct connection, and the attacker can retrigger it on every reconnect."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/client/smbdirect.c"], "versions": [{"version": "f198186aa9bbd60fae7a2061f4feec614d880299", "lessThan": "5e919f0420fa3f467c0cc12bd60d08ca8a45ef8b", "status": "affected", "versionType": "git"}, {"version": "f198186aa9bbd60fae7a2061f4feec614d880299", "lessThan": "6ae90a2baf923e85eb037b636aa641250bf4220f", "status": "affected", "versionType": "git"}, {"version": "f198186aa9bbd60fae7a2061f4feec614d880299", "lessThan": "3fabb1236f2e3ad78d531be0a4ad9f4a4ccdda87", "status": "affected", "versionType": "git"}, {"version": "f198186aa9bbd60fae7a2061f4feec614d880299", "lessThan": "d9dcbbcf9145b68aa85c40947311a6907277e097", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/client/smbdirect.c"], "versions": [{"version": "4.16", "status": "affected"}, {"version": "0", "lessThan": "4.16", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.49", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.16.9", "lessThanOrEqual": "6.16.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.17", "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": "4.16", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "6.12.49"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "6.16.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "6.17"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/5e919f0420fa3f467c0cc12bd60d08ca8a45ef8b"}, {"url": "https://git.kernel.org/stable/c/6ae90a2baf923e85eb037b636aa641250bf4220f"}, {"url": "https://git.kernel.org/stable/c/3fabb1236f2e3ad78d531be0a4ad9f4a4ccdda87"}, {"url": "https://git.kernel.org/stable/c/d9dcbbcf9145b68aa85c40947311a6907277e097"}], "title": "smb: client: let smbd_destroy() call disable_work_sync(&info->post_send_credits_work)", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2025-39932", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-15T21:54:50.496706Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-15T22:02:33.451Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2025-39932", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-15T21:54:50.496706Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-15T21:54:51.519Z"}}], "cna": {"title": "smb: client: let smbd_destroy() call disable_work_sync(&info->post_send_credits_work)", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 9.8, "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}, "scenarios": [{"lang": "en", "value": "AV:N - The vulnerable teardown path is the client's SMB Direct (RDMA) transport, driven entirely by the remote SMB server peer over iWARP/RoCE/IB \u2014 the peer triggers the disconnect that enters `smbd_destroy()` via `cifs_reconnect()`/`smbd_reconnect()` and controls the receive-credit traffic that requeues `post_send_credits_work`. This matches the established scoring of other client-side smbdirect flaws (e.g. CVE-2026-31609, CVE-2026-31535) as network-reachable.\nAC:L - The attacker owns both sides of the race: it initiates the RDMA disconnect that starts `smbd_destroy()`, it controls how many receive buffers are outstanding (and therefore how many `put_receive_buffer()` \u2192 `queue_work()` requeues `ib_drain_qp()` flushes), and it can force reconnect cycles indefinitely until it wins. The window is not narrow \u2014 the reporter hit it during ordinary rxe testing, and the worker's status check is a TOCTOU that a preempted worker bypasses without any signal or unusual state.\nPR:N - The SMB Direct transport connect/teardown and credit machinery sits below SMB session setup, so no credentials, capability, or account on the target are validated anywhere on the path to `smbd_post_send_credits()`. The remote peer needs no privileges on the client to reset the connection and drive the teardown.\nUI:N - Against an already-established SMB Direct mount \u2014 persistent deployment state, not participation in the compromise \u2014 the attacker completes the whole sequence by resetting the RDMA connection; the client's demultiplex thread enters `smbd_reconnect()` \u2192 `smbd_destroy()` automatically with no victim action.\nS:U - The freed QP, protection domain and receive buffers are all kernel-internal objects belonging to the same security authority as the faulting code. No VM, IOMMU, or sandbox boundary is crossed.\nC:H - This is a use-after-free of the `ib_qp` freed by `rdma_destroy_qp()`, whose contents are read back by `ib_post_recv()`/`ib_post_send()` (`qp->device`, `qp->valid`, queue pointers) along with a stale `sc->ib.pd->local_dma_lkey`; reclaiming that slab lets an attacker read and exfiltrate kernel memory, and stale DMA mappings can expose freed receive buffers.\nI:H - `ib_post_recv()` dispatches through `qp->device->ops.post_recv` \u2014 a function pointer loaded from freed memory \u2014 giving a control-flow hijack primitive once the QP slab is sprayed, and the driver additionally writes a WQE and producer index into the freed ring, yielding a write primitive into reclaimed memory.\nA:H - The observed result is a kernel WARN/oops inside the workqueue worker, and after `sc->ib.qp = NULL` the same path is an outright NULL dereference; either panics the machine under `panic_on_oops` and otherwise wedges the SMB Direct connection, and the attacker can retrigger it on every reconnect."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "f198186aa9bbd60fae7a2061f4feec614d880299", "lessThan": "5e919f0420fa3f467c0cc12bd60d08ca8a45ef8b", "versionType": "git"}, {"status": "affected", "version": "f198186aa9bbd60fae7a2061f4feec614d880299", "lessThan": "6ae90a2baf923e85eb037b636aa641250bf4220f", "versionType": "git"}, {"status": "affected", "version": "f198186aa9bbd60fae7a2061f4feec614d880299", "lessThan": "3fabb1236f2e3ad78d531be0a4ad9f4a4ccdda87", "versionType": "git"}, {"status": "affected", "version": "f198186aa9bbd60fae7a2061f4feec614d880299", "lessThan": "d9dcbbcf9145b68aa85c40947311a6907277e097", "versionType": "git"}], "programFiles": ["fs/smb/client/smbdirect.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "4.16"}, {"status": "unaffected", "version": "0", "lessThan": "4.16", "versionType": "semver"}, {"status": "unaffected", "version": "6.1.191", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.12.49", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.16.9", "versionType": "semver", "lessThanOrEqual": "6.16.*"}, {"status": "unaffected", "version": "6.17", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["fs/smb/client/smbdirect.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/5e919f0420fa3f467c0cc12bd60d08ca8a45ef8b"}, {"url": "https://git.kernel.org/stable/c/6ae90a2baf923e85eb037b636aa641250bf4220f"}, {"url": "https://git.kernel.org/stable/c/3fabb1236f2e3ad78d531be0a4ad9f4a4ccdda87"}, {"url": "https://git.kernel.org/stable/c/d9dcbbcf9145b68aa85c40947311a6907277e097"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: let smbd_destroy() call disable_work_sync(&info->post_send_credits_work)\n\nIn smbd_destroy() we may destroy the memory so we better\nwait until post_send_credits_work is no longer pending\nand will never be started again.\n\nI actually just hit the case using rxe:\n\nWARNING: CPU: 0 PID: 138 at drivers/infiniband/sw/rxe/rxe_verbs.c:1032 rxe_post_recv+0x1ee/0x480 [rdma_rxe]\n...\n[ 5305.686979] [ T138] smbd_post_recv+0x445/0xc10 [cifs]\n[ 5305.687135] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687149] [ T138] ? __kasan_check_write+0x14/0x30\n[ 5305.687185] [ T138] ? __pfx_smbd_post_recv+0x10/0x10 [cifs]\n[ 5305.687329] [ T138] ? __pfx__raw_spin_lock_irqsave+0x10/0x10\n[ 5305.687356] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687368] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687378] [ T138] ? _raw_spin_unlock_irqrestore+0x11/0x60\n[ 5305.687389] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687399] [ T138] ? get_receive_buffer+0x168/0x210 [cifs]\n[ 5305.687555] [ T138] smbd_post_send_credits+0x382/0x4b0 [cifs]\n[ 5305.687701] [ T138] ? __pfx_smbd_post_send_credits+0x10/0x10 [cifs]\n[ 5305.687855] [ T138] ? __pfx___schedule+0x10/0x10\n[ 5305.687865] [ T138] ? __pfx__raw_spin_lock_irq+0x10/0x10\n[ 5305.687875] [ T138] ? queue_delayed_work_on+0x8e/0xa0\n[ 5305.687889] [ T138] process_one_work+0x629/0xf80\n[ 5305.687908] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687917] [ T138] ? __kasan_check_write+0x14/0x30\n[ 5305.687933] [ T138] worker_thread+0x87f/0x1570\n...\n\nIt means rxe_post_recv was called after rdma_destroy_qp().\nThis happened because put_receive_buffer() was triggered\nby ib_drain_qp() and called:\nqueue_work(info->workqueue, &info->post_send_credits_work);"}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.191", "versionStartIncluding": "4.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.49", "versionStartIncluding": "4.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.16.9", "versionStartIncluding": "4.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.17", "versionStartIncluding": "4.16"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:22:37.422Z"}}}, "cveMetadata": {"cveId": "CVE-2025-39932", "state": "PUBLISHED", "dateUpdated": "2026-10-30T12:22:37.422Z", "dateReserved": "2025-04-16T07:20:57.148Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2025-10-04T07:30:56.726Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/smb/client/smbdirect.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "5e919f0420fa3f467c0cc12bd60d08ca8a45ef8b", "status": "affected", "version": "f198186aa9bbd60fae7a2061f4feec614d880299", "versionType": "git"}, {"lessThan": "6ae90a2baf923e85eb037b636aa641250bf4220f", "status": "affected", "version": "f198186aa9bbd60fae7a2061f4feec614d880299", "versionType": "git"}, {"lessThan": "3fabb1236f2e3ad78d531be0a4ad9f4a4ccdda87", "status": "affected", "version": "f198186aa9bbd60fae7a2061f4feec614d880299", "versionType": "git"}, {"lessThan": "d9dcbbcf9145b68aa85c40947311a6907277e097", "status": "affected", "version": "f198186aa9bbd60fae7a2061f4feec614d880299", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/smb/client/smbdirect.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.16"}, {"lessThan": "4.16", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.49", "versionType": "semver"}, {"lessThanOrEqual": "6.16.*", "status": "unaffected", "version": "6.16.9", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.17", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "DFEC22E5-D6FE-4371-A285-92B65EBAE3F3", "versionEndExcluding": "6.12.49", "versionStartIncluding": "4.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "638DD910-1189-4F5E-98BF-2D436B695112", "versionEndExcluding": "6.16.9", "versionStartIncluding": "6.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:*", "matchCriteriaId": "327D22EF-390B-454C-BD31-2ED23C998A1C", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:*", "matchCriteriaId": "C730CD9A-D969-4A8E-9522-162AAF7C0EE9", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.17:rc3:*:*:*:*:*:*", "matchCriteriaId": "39982C4B-716E-4B2F-8196-FA301F47807D", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.17:rc4:*:*:*:*:*:*", "matchCriteriaId": "340BEEA9-D70D-4290-B502-FBB1032353B1", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.17:rc5:*:*:*:*:*:*", "matchCriteriaId": "47E4C5C0-079F-4838-971B-8C503D48FCC2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.17:rc6:*:*:*:*:*:*", "matchCriteriaId": "5A4516A6-C12E-42A4-8C0E-68AEF3264504", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: let smbd_destroy() call disable_work_sync(&info->post_send_credits_work)\n\nIn smbd_destroy() we may destroy the memory so we better\nwait until post_send_credits_work is no longer pending\nand will never be started again.\n\nI actually just hit the case using rxe:\n\nWARNING: CPU: 0 PID: 138 at drivers/infiniband/sw/rxe/rxe_verbs.c:1032 rxe_post_recv+0x1ee/0x480 [rdma_rxe]\n...\n[ 5305.686979] [ T138] smbd_post_recv+0x445/0xc10 [cifs]\n[ 5305.687135] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687149] [ T138] ? __kasan_check_write+0x14/0x30\n[ 5305.687185] [ T138] ? __pfx_smbd_post_recv+0x10/0x10 [cifs]\n[ 5305.687329] [ T138] ? __pfx__raw_spin_lock_irqsave+0x10/0x10\n[ 5305.687356] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687368] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687378] [ T138] ? _raw_spin_unlock_irqrestore+0x11/0x60\n[ 5305.687389] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687399] [ T138] ? get_receive_buffer+0x168/0x210 [cifs]\n[ 5305.687555] [ T138] smbd_post_send_credits+0x382/0x4b0 [cifs]\n[ 5305.687701] [ T138] ? __pfx_smbd_post_send_credits+0x10/0x10 [cifs]\n[ 5305.687855] [ T138] ? __pfx___schedule+0x10/0x10\n[ 5305.687865] [ T138] ? __pfx__raw_spin_lock_irq+0x10/0x10\n[ 5305.687875] [ T138] ? queue_delayed_work_on+0x8e/0xa0\n[ 5305.687889] [ T138] process_one_work+0x629/0xf80\n[ 5305.687908] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687917] [ T138] ? __kasan_check_write+0x14/0x30\n[ 5305.687933] [ T138] worker_thread+0x87f/0x1570\n...\n\nIt means rxe_post_recv was called after rdma_destroy_qp().\nThis happened because put_receive_buffer() was triggered\nby ib_drain_qp() and called:\nqueue_work(info->workqueue, &info->post_send_credits_work);"}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nsmb: cliente: permitir que smbd_destroy() llame a disable_work_sync(&info->post_send_credits_work)\n\nEn smbd_destroy() podemos destruir la memoria, as\u00ed que es mejor esperar hasta que post_send_credits_work ya no est\u00e9 pendiente y nunca se inicie de nuevo.\n\nDe hecho, acabo de encontrar el caso usando rxe:\n\nADVERTENCIA: CPU: 0 PID: 138 en drivers/infiniband/sw/rxe/rxe_verbs.c:1032 rxe_post_recv+0x1ee/0x480 [rdma_rxe]\n...\n[ 5305.686979] [ T138] smbd_post_recv+0x445/0xc10 [cifs]\n[ 5305.687135] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687149] [ T138] ? __kasan_check_write+0x14/0x30\n[ 5305.687185] [ T138] ? __pfx_smbd_post_recv+0x10/0x10 [cifs]\n[ 5305.687329] [ T138] ? __pfx__raw_spin_lock_irqsave+0x10/0x10\n[ 5305.687356] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687368] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687378] [ T138] ? _raw_spin_unlock_irqrestore+0x11/0x60\n[ 5305.687389] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687399] [ T138] ? get_receive_buffer+0x168/0x210 [cifs]\n[ 5305.687555] [ T138] smbd_post_send_credits+0x382/0x4b0 [cifs]\n[ 5305.687701] [ T138] ? __pfx_smbd_post_send_credits+0x10/0x10 [cifs]\n[ 5305.687855] [ T138] ? __pfx___schedule+0x10/0x10\n[ 5305.687865] [ T138] ? __pfx__raw_spin_lock_irq+0x10/0x10\n[ 5305.687875] [ T138] ? queue_delayed_work_on+0x8e/0xa0\n[ 5305.687889] [ T138] process_one_work+0x629/0xf80\n[ 5305.687908] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687917] [ T138] ? __kasan_check_write+0x14/0x30\n[ 5305.687933] [ T138] worker_thread+0x87f/0x1570\n...\n\nSignifica que rxe_post_recv fue llamado despu\u00e9s de rdma_destroy_qp().\nEsto ocurri\u00f3 porque put_receive_buffer() fue activado por ib_drain_qp() y llam\u00f3 a:\nqueue_work(info->workqueue, &info->post_send_credits_work);"}], "id": "CVE-2025-39932", "lastModified": "2026-10-30T13:18:11.463", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "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-2025-39932", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-15T21:54:50.496706Z", "version": "2.0.3"}}]}, "published": "2025-10-04T08:15:45.953", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3fabb1236f2e3ad78d531be0a4ad9f4a4ccdda87"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5e919f0420fa3f467c0cc12bd60d08ca8a45ef8b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6ae90a2baf923e85eb037b636aa641250bf4220f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d9dcbbcf9145b68aa85c40947311a6907277e097"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: smb: client: let smbd_destroy() call disable_work_sync(&info->post_send_credits_work)", "id": "2401417", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2401417"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nsmb: client: let smbd_destroy() call disable_work_sync(&info->post_send_credits_work)\nIn smbd_destroy() we may destroy the memory so we better\nwait until post_send_credits_work is no longer pending\nand will never be started again.\nI actually just hit the case using rxe:\nWARNING: CPU: 0 PID: 138 at drivers/infiniband/sw/rxe/rxe_verbs.c:1032 rxe_post_recv+0x1ee/0x480 [rdma_rxe]\n...\n[ 5305.686979] [ T138] smbd_post_recv+0x445/0xc10 [cifs]\n[ 5305.687135] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687149] [ T138] ? __kasan_check_write+0x14/0x30\n[ 5305.687185] [ T138] ? __pfx_smbd_post_recv+0x10/0x10 [cifs]\n[ 5305.687329] [ T138] ? __pfx__raw_spin_lock_irqsave+0x10/0x10\n[ 5305.687356] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687368] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687378] [ T138] ? _raw_spin_unlock_irqrestore+0x11/0x60\n[ 5305.687389] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687399] [ T138] ? get_receive_buffer+0x168/0x210 [cifs]\n[ 5305.687555] [ T138] smbd_post_send_credits+0x382/0x4b0 [cifs]\n[ 5305.687701] [ T138] ? __pfx_smbd_post_send_credits+0x10/0x10 [cifs]\n[ 5305.687855] [ T138] ? __pfx___schedule+0x10/0x10\n[ 5305.687865] [ T138] ? __pfx__raw_spin_lock_irq+0x10/0x10\n[ 5305.687875] [ T138] ? queue_delayed_work_on+0x8e/0xa0\n[ 5305.687889] [ T138] process_one_work+0x629/0xf80\n[ 5305.687908] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687917] [ T138] ? __kasan_check_write+0x14/0x30\n[ 5305.687933] [ T138] worker_thread+0x87f/0x1570\n...\nIt means rxe_post_recv was called after rdma_destroy_qp().\nThis happened because put_receive_buffer() was triggered\nby ib_drain_qp() and called:\nqueue_work(info->workqueue, &info->post_send_credits_work);"], "name": "CVE-2025-39932", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:rhivos:1", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat In-Vehicle Operating System 1"}], "public_date": "2025-10-04T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-39932\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-39932\nhttps://lore.kernel.org/linux-cve-announce/2025100416-CVE-2025-39932-bdaf@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-10-06T14:42:00.303595+00:00", "updated": "2025-10-06T14:42:00.303653+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}