CVE-2023-53026

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This can lead to an infinite loop inside the iterator function\nbecause the overflow prevents the counter to be larger\nthan the size of the sg entry.\n\nFix the presented problem by changing the advancement condition to\neliminate overflow.\n\nBacktrace:\n[ 192.374329] efa_reg_user_mr_dmabuf\n[ 192.376783] efa_register_mr\n[ 192.382579] pgsz_bitmap 0xfffff000 rounddown 0x80000000\n[ 192.386423] pg_sz [0x80000000] umem_length[0xc0000000]\n[ 192.392657] start 0x0 length 0xc0000000 params.page_shift 31 params.page_num 3\n[ 192.399559] hp_cnt[3], pages_in_hp[524288]\n[ 192.403690] umem->sgt_append.sgt.nents[1]\n[ 192.407905] number entries: [1], pg_bit: [31]\n[ 192.411397] biter->__sg_nents [1] biter->__sg [0000000008b0c5d8]\n[ 192.415601] biter->__sg_advance [665837568] sg_dma_len[3221225472]\n[ 192.419823] biter->__sg_nents [1] biter->__sg [0000000008b0c5d8]\n[ 192.423976] biter->__sg_advance [2813321216] sg_dma_len[3221225472]\n[ 192.428243] biter->__sg_nents [1] biter->__sg [0000000008b0c5d8]\n[ 192.432397] biter->__sg_advance [665837568] sg_dma_len[3221225472]"}], "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 vulnerable iterator runs during local RDMA memory registration via uverbs (REG_MR / REG_DMABUF_MR ioctl on /dev/infiniband/uverbs*), not from remote packet processing.\nAC:L - An attacker who can register a large MR (e.g. ~3GB dmabuf on EFA) reliably triggers the overflow when the device selects a large HW page size such as 2GB; length and registration path are under attacker control.\nPR:L - uverbs devices are world-accessible by default (0666), REG_MR requires no capability, and the dmabuf path in the reported backtrace does not require CAP_IPC_LOCK; HPC/cloud RDMA users are typically unprivileged.\nUI:N - Exploitation requires only the attacker\u2019s own RDMA registration syscalls; no victim interaction is needed.\nS:U - Impact is confined to the local kernel privilege boundary (DoS or privilege escalation within the host); it is not a guest-to-host or IOMMU-scope escape by itself.\nC:H - The infinite iterator causes unbounded out-of-bounds writes of DMA addresses into undersized stack/heap page lists (e.g. EFA inline_pbl_array), which is memory corruption that can be leveraged for information disclosure.\nI:H - Unbounded OOB writes into stack (EFA inline PBL) or heap (mlx5 populate_pas and similar) enable corruption exploitable for control-flow hijacking and arbitrary write primitives.\nA:H - The overflowed counter prevents loop termination, causing an unkillable infinite kernel loop / soft lockup, and the accompanying OOB writes can oops or panic the kernel."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/infiniband/core/verbs.c"], "versions": [{"version": "a808273a495c657e33281b181fd7fcc2bb28f662", "lessThan": "902063a9fea5f8252df392ade746bc9cfd07a5ae", "status": "affected", "versionType": "git"}, {"version": "a808273a495c657e33281b181fd7fcc2bb28f662", "lessThan": "d66c1d4178c219b6e7d7a6f714e3e3656faccc36", "status": "affected", "versionType": "git"}, {"version": "a808273a495c657e33281b181fd7fcc2bb28f662", "lessThan": "362c9489720b31b6aa7491423ba65a4e98aa9838", "status": "affected", "versionType": "git"}, {"version": "a808273a495c657e33281b181fd7fcc2bb28f662", "lessThan": "43811d07ea64366af8ec9e168c558ec51440c39e", "status": "affected", "versionType": "git"}, {"version": "a808273a495c657e33281b181fd7fcc2bb28f662", "lessThan": "0afec5e9cea732cb47014655685a2a47fb180c31", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/infiniband/core/verbs.c"], "versions": [{"version": "5.2", "status": "affected"}, {"version": "0", "lessThan": "5.2", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.231", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.166", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.91", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.9", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.2", "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": "5.2", "versionEndExcluding": "5.4.231"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "5.10.166"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "5.15.91"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "6.1.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "6.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/902063a9fea5f8252df392ade746bc9cfd07a5ae"}, {"url": "https://git.kernel.org/stable/c/d66c1d4178c219b6e7d7a6f714e3e3656faccc36"}, {"url": "https://git.kernel.org/stable/c/362c9489720b31b6aa7491423ba65a4e98aa9838"}, {"url": "https://git.kernel.org/stable/c/43811d07ea64366af8ec9e168c558ec51440c39e"}, {"url": "https://git.kernel.org/stable/c/0afec5e9cea732cb47014655685a2a47fb180c31"}], "title": "RDMA/core: Fix ib block iterator counter overflow", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-835", "lang": "en", "description": "CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')"}]}], "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2025-10-01T17:18:44.025281Z", "id": "CVE-2023-53026", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-01T17:18:47.704Z"}}]}}

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This can lead to an infinite loop inside the iterator function\nbecause the overflow prevents the counter to be larger\nthan the size of the sg entry.\n\nFix the presented problem by changing the advancement condition to\neliminate overflow.\n\nBacktrace:\n[ 192.374329] efa_reg_user_mr_dmabuf\n[ 192.376783] efa_register_mr\n[ 192.382579] pgsz_bitmap 0xfffff000 rounddown 0x80000000\n[ 192.386423] pg_sz [0x80000000] umem_length[0xc0000000]\n[ 192.392657] start 0x0 length 0xc0000000 params.page_shift 31 params.page_num 3\n[ 192.399559] hp_cnt[3], pages_in_hp[524288]\n[ 192.403690] umem->sgt_append.sgt.nents[1]\n[ 192.407905] number entries: [1], pg_bit: [31]\n[ 192.411397] biter->__sg_nents [1] biter->__sg [0000000008b0c5d8]\n[ 192.415601] biter->__sg_advance [665837568] sg_dma_len[3221225472]\n[ 192.419823] biter->__sg_nents [1] biter->__sg [0000000008b0c5d8]\n[ 192.423976] biter->__sg_advance [2813321216] sg_dma_len[3221225472]\n[ 192.428243] biter->__sg_nents [1] biter->__sg [0000000008b0c5d8]\n[ 192.432397] biter->__sg_advance [665837568] sg_dma_len[3221225472]"}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.4.231", "versionStartIncluding": "5.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.166", "versionStartIncluding": "5.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.91", "versionStartIncluding": "5.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.9", "versionStartIncluding": "5.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.2", "versionStartIncluding": "5.2"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-05-04T07:48:02.656Z"}}}, "cveMetadata": {"cveId": "CVE-2023-53026", "state": "PUBLISHED", "dateUpdated": "2025-10-01T17:18:47.704Z", "dateReserved": "2025-03-27T16:40:15.756Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2025-03-27T16:43:51.194Z", "assignerShortName": "Linux"}, "dataVersion": "5.1"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/infiniband/core/verbs.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "902063a9fea5f8252df392ade746bc9cfd07a5ae", "status": "affected", "version": "a808273a495c657e33281b181fd7fcc2bb28f662", "versionType": "git"}, {"lessThan": "d66c1d4178c219b6e7d7a6f714e3e3656faccc36", "status": "affected", "version": "a808273a495c657e33281b181fd7fcc2bb28f662", "versionType": "git"}, {"lessThan": "362c9489720b31b6aa7491423ba65a4e98aa9838", "status": "affected", "version": "a808273a495c657e33281b181fd7fcc2bb28f662", "versionType": "git"}, {"lessThan": "43811d07ea64366af8ec9e168c558ec51440c39e", "status": "affected", "version": "a808273a495c657e33281b181fd7fcc2bb28f662", "versionType": "git"}, {"lessThan": "0afec5e9cea732cb47014655685a2a47fb180c31", "status": "affected", "version": "a808273a495c657e33281b181fd7fcc2bb28f662", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/infiniband/core/verbs.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.2"}, {"lessThan": "5.2", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.4.*", "status": "unaffected", "version": "5.4.231", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.166", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.91", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.9", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "CE5CA7CE-9223-4A0E-9EC7-CD255B30BD3B", "versionEndExcluding": "5.4.231", "versionStartIncluding": "5.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "A44D9D24-661C-40D4-8735-4CEB1C7C02F2", "versionEndExcluding": "5.10.166", "versionStartIncluding": "5.5", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "91C2E92D-CC25-4FBD-8824-56A148119D7E", "versionEndExcluding": "5.15.91", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "ED5B6045-B1D2-4E03-B194-9005A351BCAE", "versionEndExcluding": "6.1.9", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.2:rc1:*:*:*:*:*:*", "matchCriteriaId": "FF501633-2F44-4913-A8EE-B021929F49F6", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.2:rc2:*:*:*:*:*:*", "matchCriteriaId": "2BDA597B-CAC1-4DF0-86F0-42E142C654E9", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.2:rc3:*:*:*:*:*:*", "matchCriteriaId": "725C78C9-12CE-406F-ABE8-0813A01D66E8", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.2:rc4:*:*:*:*:*:*", "matchCriteriaId": "A127C155-689C-4F67-B146-44A57F4BFD85", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/core: Fix ib block iterator counter overflow\n\nWhen registering a new DMA MR after selecting the best aligned page size\nfor it, we iterate over the given sglist to split each entry to smaller,\naligned to the selected page size, DMA blocks.\n\nIn given circumstances where the sg entry and page size fit certain\nsizes and the sg entry is not aligned to the selected page size, the\ntotal size of the aligned pages we need to cover the sg entry is >= 4GB.\nUnder this circumstances, while iterating page aligned blocks, the\ncounter responsible for counting how much we advanced from the start of\nthe sg entry is overflowed because its type is u32 and we pass 4GB in\nsize. This can lead to an infinite loop inside the iterator function\nbecause the overflow prevents the counter to be larger\nthan the size of the sg entry.\n\nFix the presented problem by changing the advancement condition to\neliminate overflow.\n\nBacktrace:\n[ 192.374329] efa_reg_user_mr_dmabuf\n[ 192.376783] efa_register_mr\n[ 192.382579] pgsz_bitmap 0xfffff000 rounddown 0x80000000\n[ 192.386423] pg_sz [0x80000000] umem_length[0xc0000000]\n[ 192.392657] start 0x0 length 0xc0000000 params.page_shift 31 params.page_num 3\n[ 192.399559] hp_cnt[3], pages_in_hp[524288]\n[ 192.403690] umem->sgt_append.sgt.nents[1]\n[ 192.407905] number entries: [1], pg_bit: [31]\n[ 192.411397] biter->__sg_nents [1] biter->__sg [0000000008b0c5d8]\n[ 192.415601] biter->__sg_advance [665837568] sg_dma_len[3221225472]\n[ 192.419823] biter->__sg_nents [1] biter->__sg [0000000008b0c5d8]\n[ 192.423976] biter->__sg_advance [2813321216] sg_dma_len[3221225472]\n[ 192.428243] biter->__sg_nents [1] biter->__sg [0000000008b0c5d8]\n[ 192.432397] biter->__sg_advance [665837568] sg_dma_len[3221225472]"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: RDMA/core: Fix ib block iterator counter overflow Al registrar un nuevo DMA MR despu\u00e9s de seleccionar el mejor tama\u00f1o de p\u00e1gina alineado para \u00e9l, iteramos sobre la sglist dada para dividir cada entrada en bloques DMA m\u00e1s peque\u00f1os, alineados con el tama\u00f1o de p\u00e1gina seleccionado. En determinadas circunstancias en las que la entrada sg y el tama\u00f1o de p\u00e1gina se ajustan a ciertos tama\u00f1os y la entrada sg no est\u00e1 alineada con el tama\u00f1o de p\u00e1gina seleccionado, el tama\u00f1o total de las p\u00e1ginas alineadas que necesitamos para cubrir la entrada sg es >= 4 GB. En estas circunstancias, al iterar bloques alineados de p\u00e1gina, el contador responsable de contar cu\u00e1nto avanzamos desde el inicio de la entrada sg se desborda porque su tipo es u32 y pasamos 4 GB de tama\u00f1o. Esto puede llevar a un bucle infinito dentro de la funci\u00f3n del iterador porque el desbordamiento impide que el contador sea mayor que el tama\u00f1o de la entrada sg. Solucione el problema presentado cambiando la condici\u00f3n de avance para eliminar el desbordamiento. Backtrace: [ 192.374329] efa_reg_user_mr_dmabuf [ 192.376783] efa_register_mr [ 192.382579] pgsz_bitmap 0xfffff000 rounddown 0x80000000 [ 192.386423] pg_sz [0x80000000] umem_length[0xc0000000] [ 192.392657] start 0x0 length 0xc0000000 params.page_shift 31 params.page_num 3 [ 192.399559] hp_cnt[3], pages_in_hp[524288] [ 192.403690] umem->sgt_append.sgt.nents[1] [ 192.407905] number entries: [1], pg_bit: [31] [ 192.411397] biter->__sg_nents [1] biter->__sg [0000000008b0c5d8] [ 192.415601] biter->__sg_advance [665837568] sg_dma_len[3221225472] [ 192.419823] biter->__sg_nents [1] biter->__sg [0000000008b0c5d8] [ 192.423976] biter->__sg_advance [2813321216] sg_dma_len[3221225472] [ 192.428243] biter->__sg_nents [1] biter->__sg [0000000008b0c5d8] [ 192.432397] biter->__sg_advance [665837568] sg_dma_len[3221225472] "}], "id": "CVE-2023-53026", "lastModified": "2026-08-04T10:18:52.170", "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"}, {"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": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2023-53026", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-10-01T17:18:44.025281Z", "version": "2.0.3"}}]}, "published": "2025-03-27T17:15:52.250", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0afec5e9cea732cb47014655685a2a47fb180c31"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/362c9489720b31b6aa7491423ba65a4e98aa9838"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/43811d07ea64366af8ec9e168c558ec51440c39e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/902063a9fea5f8252df392ade746bc9cfd07a5ae"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d66c1d4178c219b6e7d7a6f714e3e3656faccc36"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-835"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-835"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"affected_release": [{"advisory": "RHSA-2023:7077", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-513.5.1.el8_9", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2023-11-14T00:00:00Z"}, {"advisory": "RHSA-2023:6583", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-362.8.1.el9_3", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2023-11-07T00:00:00Z"}, {"advisory": "RHSA-2023:6583", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-362.8.1.el9_3", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2023-11-07T00:00:00Z"}], "bugzilla": {"description": "kernel: RDMA/core: Fix ib block iterator counter overflow", "id": "2355457", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2355457"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-835", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nRDMA/core: Fix ib block iterator counter overflow\nWhen registering a new DMA MR after selecting the best aligned page size\nfor it, we iterate over the given sglist to split each entry to smaller,\naligned to the selected page size, DMA blocks.\nIn given circumstances where the sg entry and page size fit certain\nsizes and the sg entry is not aligned to the selected page size, the\ntotal size of the aligned pages we need to cover the sg entry is >= 4GB.\nUnder this circumstances, while iterating page aligned blocks, the\ncounter responsible for counting how much we advanced from the start of\nthe sg entry is overflowed because its type is u32 and we pass 4GB in\nsize. This can lead to an infinite loop inside the iterator function\nbecause the overflow prevents the counter to be larger\nthan the size of the sg entry.\nFix the presented problem by changing the advancement condition to\neliminate overflow.\nBacktrace:\n[ 192.374329] efa_reg_user_mr_dmabuf\n[ 192.376783] efa_register_mr\n[ 192.382579] pgsz_bitmap 0xfffff000 rounddown 0x80000000\n[ 192.386423] pg_sz [0x80000000] umem_length[0xc0000000]\n[ 192.392657] start 0x0 length 0xc0000000 params.page_shift 31 params.page_num 3\n[ 192.399559] hp_cnt[3], pages_in_hp[524288]\n[ 192.403690] umem->sgt_append.sgt.nents[1]\n[ 192.407905] number entries: [1], pg_bit: [31]\n[ 192.411397] biter->__sg_nents [1] biter->__sg [0000000008b0c5d8]\n[ 192.415601] biter->__sg_advance [665837568] sg_dma_len[3221225472]\n[ 192.419823] biter->__sg_nents [1] biter->__sg [0000000008b0c5d8]\n[ 192.423976] biter->__sg_advance [2813321216] sg_dma_len[3221225472]\n[ 192.428243] biter->__sg_nents [1] biter->__sg [0000000008b0c5d8]\n[ 192.432397] biter->__sg_advance [665837568] sg_dma_len[3221225472]"], "name": "CVE-2023-53026", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-03-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-53026\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-53026\nhttps://lore.kernel.org/linux-cve-announce/2025032719-CVE-2023-53026-0e24@gregkh/T"], "threat_severity": "Moderate"}

{}