CVE-2026-31436

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Following the high-severity rule for such memory corruption, kernel memory disclosure is defensible.\nI:H - Wrong descriptor completion can recycle an in-flight descriptor and later complete or reuse it for another request, corrupting DMA/crypto request state and potentially enabling control-flow or data corruption. When uncertain, this is scored as high integrity impact.\nA:H - The fix commit explicitly identifies possible NULL pointer dereferences, double completion, and descriptor leaks. 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This can lead to issues such as NULL pointer\ndereferences, double completion, or descriptor leaks.\n\nFix this by completing d instead of found in the final\nlist_for_each_entry_safe() loop."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ndmaengine: idxd: corrige la posible finalizaci\u00f3n incorrecta del descriptor en llist_abort_desc()\n\nAl final de esta funci\u00f3n, d es el cursor de recorrido de flist, pero el c\u00f3digo completa found en su lugar. Esto puede llevar a problemas como desreferencias de puntero NULL, doble finalizaci\u00f3n o fugas de descriptores.\n\nSolucione esto completando d en lugar de found en el bucle final list_for_each_entry_safe()."}], "id": "CVE-2026-31436", "lastModified": "2026-11-11T23:10:00.263", "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"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-31436", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T15:09:16.062641Z", "version": "2.0.3"}}]}, "published": "2026-04-22T14:16:36.843", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0e4f43779d550e559be13a5cdb763bad92c4cc99"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/82656e8daf8de00935ae91b91bed43f4d6e0d644"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e1c9866173c5f8521f2d0768547a01508cb9ff27"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e21da2ad8844585040fe4b82be1ad2fe99d40074"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-758"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: dmaengine: idxd: fix possible wrong descriptor completion in llist_abort_desc()", "id": "2460678", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2460678"}, "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-910", "details": ["A flaw was found in the Linux kernel's dmaengine subsystem, specifically within the idxd driver. This vulnerability occurs due to incorrect descriptor completion in the `llist_abort_desc()` function. This can lead to issues such as NULL pointer dereferences, double completion, or descriptor leaks, which can result in a denial of service."], "name": "CVE-2026-31436", "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": "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": "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"}], "public_date": "2026-04-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-31436\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-31436\nhttps://lore.kernel.org/linux-cve-announce/2026042242-CVE-2026-31436-7ac7@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[aa8d18becc0c14aa3eb46d6d1b81450446e11b87,e21da2ad8844585040fe4b82be1ad2fe99d40074)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[aa8d18becc0c14aa3eb46d6d1b81450446e11b87,82656e8daf8de00935ae91b91bed43f4d6e0d644)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[aa8d18becc0c14aa3eb46d6d1b81450446e11b87,0e4f43779d550e559be13a5cdb763bad92c4cc99)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[aa8d18becc0c14aa3eb46d6d1b81450446e11b87,e1c9866173c5f8521f2d0768547a01508cb9ff27)"}}], "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": "6.8"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.8)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.80,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.21,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.19.11,6.19.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0,*]"}}], "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": "2026-04-22T15:30:20.459236+00:00", "updated": "2026-10-23T09:00:15.773405+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}