CVE-2026-43494

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But we fail to properly\nclear rm->data.op_nents.\n\nLater when rds_message_purge() is called from rds_sendmsg() the\ncleanup loop iterates over the incorrectly non zero number of\nop_nents and frees them again.\n\nFix this by properly resetting op_nents when it should be in\nrds_message_zcopy_from_user()."}], "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 - Triggered entirely by a local `sendmsg(MSG_ZEROCOPY)` syscall operating on the sending process's own user memory; a remote peer has no control over the page-pinning that fails, so it is not network-reachable.\nAC:L - The attacker fully controls the iovec layout and can deterministically pin one valid segment then point a later segment at unmapped memory to force `iov_iter_get_pages2()` to fail with `op_nents>=1`; no race or uncontrolled condition.\nPR:L - `rds_create()` performs no capability check, so any unprivileged local user can open the AF_RDS socket and reach the zerocopy send path; no real root or CAP needed.\nUI:N - The attacker performs the entire socket/setsockopt/sendmsg sequence themselves; no victim action is required.\nS:U - The corruption is within the kernel's own page-management security authority; there is no VM, IOMMU, or sandbox boundary crossed.\nC:H - The refcount underflow frees a page still mapped in the attacker's address space; once reused for other kernel/process data it remains readable through the stale mapping, enabling arbitrary memory disclosure.\nI:H - The same stale-mapping primitive permits writing into reallocated pages (page tables, slab, other tasks' memory), yielding an arbitrary-write/control-flow-hijack primitive suitable for privilege escalation.\nA:H - The double-free / page reference-count underflow corrupts kernel page state and reliably causes oops/panic, a full availability impact."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/rds/message.c"], "versions": [{"version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3", "lessThan": "c6e51512a784c4a7b86e1a044988696e3b3721fa", "status": "affected", "versionType": "git"}, {"version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3", "lessThan": "03014551938a0887fa55f18ce49b70158a9c0113", "status": "affected", "versionType": "git"}, {"version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3", "lessThan": "d84ce1786ce40fdd3dd98db47aec5527817e1ef6", "status": "affected", "versionType": "git"}, {"version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3", "lessThan": "9115669faedccdda100428e2d26fd0aac8c50799", "status": "affected", "versionType": "git"}, {"version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3", "lessThan": "0bbbff00a15b1df2cac9014d6cf4b6890f473353", "status": "affected", "versionType": "git"}, {"version": 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{"version": "6.1.175", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.141", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.91", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.33", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.10", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "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": "4.17", "versionEndExcluding": "5.10.258"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "5.15.209"}, 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{"url": "https://git.kernel.org/stable/c/03014551938a0887fa55f18ce49b70158a9c0113"}, {"url": "https://git.kernel.org/stable/c/d84ce1786ce40fdd3dd98db47aec5527817e1ef6"}, {"url": "https://git.kernel.org/stable/c/9115669faedccdda100428e2d26fd0aac8c50799"}, {"url": "https://git.kernel.org/stable/c/0bbbff00a15b1df2cac9014d6cf4b6890f473353"}, {"url": "https://git.kernel.org/stable/c/640e37f58f991546a87540d067279c2c1fa9fe51"}, {"url": "https://git.kernel.org/stable/c/290e833d1acb1093bc121fcdc97f5e6161157479"}, {"url": "https://git.kernel.org/stable/c/e174929793195e0cd6a4adb0cad731b39f9019b4"}, {"url": "https://github.com/v12-security/pocs/tree/main/pintheft"}], "title": "net/rds: reset op_nents when zerocopy page pin fails", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/05/21/2"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", 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When a zerocopy page pin operation fails, a counter used for memory management (`op_nents`) is not correctly reset. This can result in a double-free vulnerability, where the same memory is released twice. 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A local attacker could potentially exploit this to cause the system to crash (denial of service) or, in some cases, execute unauthorized code."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-1341", "description": "Multiple Releases of Same Resource or Handle"}]}], "providerMetadata": {"orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "shortName": "redhat-SADP", "dateUpdated": "2026-07-15T00:55:52.893Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-43494", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T15:17:47.906032Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-415", "description": "CWE-415 Double Free"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T15:17:48.675Z"}}], "cna": {"title": "net/rds: reset op_nents when zerocopy page pin fails", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 7.8, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}, "scenarios": [{"lang": "en", "value": "AV:L - Triggered entirely by a local `sendmsg(MSG_ZEROCOPY)` syscall operating on the sending process's own user memory; a remote peer has no control over the page-pinning that fails, so it is not network-reachable.\nAC:L - The attacker fully controls the iovec layout and can deterministically pin one valid segment then point a later segment at unmapped memory to force `iov_iter_get_pages2()` to fail with `op_nents>=1`; no race or uncontrolled condition.\nPR:L - `rds_create()` performs no capability check, so any unprivileged local user can open the AF_RDS socket and reach the zerocopy send path; no real root or CAP needed.\nUI:N - The attacker performs the entire socket/setsockopt/sendmsg sequence themselves; no victim action is required.\nS:U - The corruption is within the kernel's own page-management security authority; there is no VM, IOMMU, or sandbox boundary crossed.\nC:H - The refcount underflow frees a page still mapped in the attacker's address space; once reused for other kernel/process data it remains readable through the stale mapping, enabling arbitrary memory disclosure.\nI:H - The same stale-mapping primitive permits writing into reallocated pages (page tables, slab, other tasks' memory), yielding an arbitrary-write/control-flow-hijack primitive suitable for privilege escalation.\nA:H - The double-free / page reference-count underflow corrupts kernel page state and reliably causes oops/panic, a full availability impact."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3", "lessThan": "c6e51512a784c4a7b86e1a044988696e3b3721fa", "versionType": "git"}, {"status": "affected", "version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3", "lessThan": "03014551938a0887fa55f18ce49b70158a9c0113", "versionType": "git"}, {"status": "affected", "version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3", "lessThan": "d84ce1786ce40fdd3dd98db47aec5527817e1ef6", "versionType": "git"}, {"status": "affected", "version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3", "lessThan": "9115669faedccdda100428e2d26fd0aac8c50799", "versionType": "git"}, {"status": "affected", "version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3", "lessThan": "0bbbff00a15b1df2cac9014d6cf4b6890f473353", "versionType": "git"}, {"status": "affected", "version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3", "lessThan": "640e37f58f991546a87540d067279c2c1fa9fe51", "versionType": "git"}, {"status": "affected", "version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3", "lessThan": "290e833d1acb1093bc121fcdc97f5e6161157479", "versionType": "git"}, {"status": "affected", "version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3", "lessThan": "e174929793195e0cd6a4adb0cad731b39f9019b4", "versionType": "git"}], "programFiles": ["net/rds/message.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "4.17"}, {"status": "unaffected", "version": "0", "lessThan": "4.17", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.258", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.209", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.175", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.141", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.91", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.33", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.0.10", "versionType": "semver", "lessThanOrEqual": "7.0.*"}, {"status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/rds/message.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/c6e51512a784c4a7b86e1a044988696e3b3721fa"}, {"url": "https://git.kernel.org/stable/c/03014551938a0887fa55f18ce49b70158a9c0113"}, {"url": "https://git.kernel.org/stable/c/d84ce1786ce40fdd3dd98db47aec5527817e1ef6"}, {"url": "https://git.kernel.org/stable/c/9115669faedccdda100428e2d26fd0aac8c50799"}, {"url": "https://git.kernel.org/stable/c/0bbbff00a15b1df2cac9014d6cf4b6890f473353"}, {"url": "https://git.kernel.org/stable/c/640e37f58f991546a87540d067279c2c1fa9fe51"}, {"url": "https://git.kernel.org/stable/c/290e833d1acb1093bc121fcdc97f5e6161157479"}, {"url": "https://git.kernel.org/stable/c/e174929793195e0cd6a4adb0cad731b39f9019b4"}, {"url": "https://github.com/v12-security/pocs/tree/main/pintheft"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/rds: reset op_nents when zerocopy page pin fails\n\nWhen iov_iter_get_pages2() fails in rds_message_zcopy_from_user(),\nthe pinned pages are released with put_page(), and\nrm->data.op_mmp_znotifier is cleared. But we fail to properly\nclear rm->data.op_nents.\n\nLater when rds_message_purge() is called from rds_sendmsg() the\ncleanup loop iterates over the incorrectly non zero number of\nop_nents and frees them again.\n\nFix this by properly resetting op_nents when it should be in\nrds_message_zcopy_from_user()."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.258", "versionStartIncluding": "4.17"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.209", "versionStartIncluding": "4.17"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.175", "versionStartIncluding": "4.17"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.141", "versionStartIncluding": "4.17"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.91", "versionStartIncluding": "4.17"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.33", "versionStartIncluding": "4.17"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.0.10", "versionStartIncluding": "4.17"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1", "versionStartIncluding": "4.17"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:28:17.738Z"}}}, "cveMetadata": {"cveId": "CVE-2026-43494", "state": "PUBLISHED", "dateUpdated": "2026-10-19T19:26:37.859Z", "dateReserved": "2026-05-01T14:12:56.013Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-05-21T10:49:21.310Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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"versionType": "git"}, {"lessThan": "640e37f58f991546a87540d067279c2c1fa9fe51", "status": "affected", "version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3", "versionType": "git"}, {"lessThan": "290e833d1acb1093bc121fcdc97f5e6161157479", "status": "affected", "version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3", "versionType": "git"}, {"lessThan": "e174929793195e0cd6a4adb0cad731b39f9019b4", "status": "affected", "version": "0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/rds/message.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.17"}, {"lessThan": "4.17", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.258", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": 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"https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/o:redhat:enterprise_linux:6"], "defaultStatus": "unaffected", "packageName": "kernel", "product": "Red Hat Enterprise Linux 6", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/o:redhat:enterprise_linux:7"], "defaultStatus": "unaffected", "packageName": "kernel", "product": "Red Hat Enterprise Linux 7", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/o:redhat:enterprise_linux:7"], "defaultStatus": "unaffected", "packageName": "kernel-rt", "product": "Red Hat Enterprise Linux 7", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/o:redhat:enterprise_linux:8"], "defaultStatus": "unaffected", "packageName": "kernel", "product": "Red Hat Enterprise Linux 8", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/o:redhat:enterprise_linux:8"], "defaultStatus": "unaffected", "packageName": "kernel-rt", "product": "Red Hat Enterprise Linux 8", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/o:redhat:enterprise_linux:9"], "defaultStatus": "unaffected", "packageName": "kernel", "product": "Red Hat Enterprise Linux 9", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/o:redhat:enterprise_linux:9"], "defaultStatus": "unaffected", "packageName": "kernel-rt", "product": "Red Hat Enterprise Linux 9", "vendor": "Red Hat"}], "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "CF9EFBB4-E004-479B-A237-DECC87FD4D0E", "versionEndExcluding": "5.10.258", "versionStartIncluding": "4.17", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "919C10A9-7951-4A74-BADD-C135A0A8D8B4", "versionEndExcluding": "5.15.209", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "92385813-D91D-480D-83A1-F423D2CBB2BA", "versionEndExcluding": "6.1.175", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "97A9FFFA-22BB-4D5C-9790-5A2286E392F7", "versionEndExcluding": "6.6.141", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "C918746B-DE6F-448F-A93E-A04C5481688D", "versionEndExcluding": "6.12.91", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "96D99E49-380D-43AB-BDBA-25C3AD018A9C", "versionEndExcluding": "6.18.33", "versionStartIncluding": "6.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "A13475D2-59BF-4716-94B5-7C1D239A2CF4", "versionEndExcluding": "7.0.10", "versionStartIncluding": "6.19", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*", "matchCriteriaId": "B1EF7059-E670-45F4-B422-54C40FA86390", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*", "matchCriteriaId": "0D38F0BF-A728-4133-A358-D44A2F7EE6D6", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*", "matchCriteriaId": "EC732D08-5F7B-46D9-B154-E60C7F4F0A97", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/rds: reset op_nents when zerocopy page pin fails\n\nWhen iov_iter_get_pages2() fails in rds_message_zcopy_from_user(),\nthe pinned pages are released with put_page(), and\nrm->data.op_mmp_znotifier is cleared. But we fail to properly\nclear rm->data.op_nents.\n\nLater when rds_message_purge() is called from rds_sendmsg() the\ncleanup loop iterates over the incorrectly non zero number of\nop_nents and frees them again.\n\nFix this by properly resetting op_nents when it should be in\nrds_message_zcopy_from_user()."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnet/rds: restablecer op_nents cuando falla el anclaje de p\u00e1gina de copia cero\n\nCuando iov_iter_get_pages2() falla en rds_message_zcopy_from_user(), las p\u00e1ginas ancladas se liberan con put_page(), y rm->data.op_mmp_znotifier se borra. Pero no logramos borrar correctamente rm->data.op_nents.\n\nM\u00e1s tarde, cuando se llama a rds_message_purge() desde rds_sendmsg(), el bucle de limpieza itera sobre el n\u00famero incorrectamente no cero de op_nents y los libera de nuevo.\n\nSolucionar esto restableciendo correctamente op_nents cuando deber\u00eda ser en rds_message_zcopy_from_user()."}], "id": "CVE-2026-43494", "lastModified": "2026-10-19T20:18:18.620", "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": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.0, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 5.9, "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-43494", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T15:17:47.906032Z", "version": "2.0.3"}}]}, "published": "2026-05-21T12:16:19.957", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/03014551938a0887fa55f18ce49b70158a9c0113"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0bbbff00a15b1df2cac9014d6cf4b6890f473353"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/290e833d1acb1093bc121fcdc97f5e6161157479"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/640e37f58f991546a87540d067279c2c1fa9fe51"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9115669faedccdda100428e2d26fd0aac8c50799"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c6e51512a784c4a7b86e1a044988696e3b3721fa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d84ce1786ce40fdd3dd98db47aec5527817e1ef6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e174929793195e0cd6a4adb0cad731b39f9019b4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/v12-security/pocs/tree/main/pintheft"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List"], "url": "http://www.openwall.com/lists/oss-security/2026/05/21/2"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/security/cve/CVE-2026-43494"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2480434"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43494.json"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-415"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-1341"}], "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: net/rds: reset op_nents when zerocopy page pin fails", "id": "2480434", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2480434"}, "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"}, "cwe": "CWE-1341", "details": ["A flaw was found in the Linux kernel, specifically within the `net/rds` module. When a zerocopy page pin operation fails, a counter used for memory management (`op_nents`) is not correctly reset. This can result in a double-free vulnerability, where the same memory is released twice. A local attacker could potentially exploit this to cause the system to crash (denial of service) or, in some cases, execute unauthorized code."], "name": "CVE-2026-43494", "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": "Under investigation", "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": "2026-05-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43494\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43494\nhttps://lore.kernel.org/linux-cve-announce/2026052130-CVE-2026-43494-a65a@gregkh/T"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3,e174929793195e0cd6a4adb0cad731b39f9019b4)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "4.17"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.17)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1-rc4,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-05-21T12:30:10.120744+00:00", "updated": "2026-10-23T01:15:14.063692+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}