{"id":"CVE-2026-80945","title":"In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: iaa - unmap dst before software fallback on decompress\n\nOn a hardware analytics error, decompress retries through the software\nfallback, which writes req->dst w…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: iaa - unmap dst before software fallback on decompress\n\nOn a hardware analytics error, decompress retries through the software\nfallback, which writes req->dst w…","severity":"critical","cvss":9.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","cwe":["CWE-787"],"vendor":"Linux","product":"Linux","affected":["Linux >= 2ec6761df889fdf896fde761abd447596dd8f8c2 < c0279e5ea2aad99d8b91f1a6579d751cc9eb2408","Linux >= 2ec6761df889fdf896fde761abd447596dd8f8c2 < fc933a4a419ba8a75da28666a018602c44846953","Linux >= 2ec6761df889fdf896fde761abd447596dd8f8c2 < fcd86180ef78b0e41763faef7c6d2de7dfb50c1a","Linux >= 2ec6761df889fdf896fde761abd447596dd8f8c2 < 94a25930477113730372e0fa2985da4c5ac95c9a","Linux 6.8"],"published":"2026-09-11","updated":"2026-09-21","sourceUpdated":"2026-09-21T14:17:21.567","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-80945","references":[{"url":"https://git.kernel.org/stable/c/94a25930477113730372e0fa2985da4c5ac95c9a","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c0279e5ea2aad99d8b91f1a6579d751cc9eb2408","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/fc933a4a419ba8a75da28666a018602c44846953","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/fcd86180ef78b0e41763faef7c6d2de7dfb50c1a","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80945.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-80945"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532217"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80945"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80945"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80945.mbox"}],"tags":["nvd","cve.org","csaf","vex","red-hat","score-dispute"],"epss":0.00471,"epssPercentile":0.39769,"scores":{"nvd":9.1,"cna":9.1,"vendor":7},"ingestedAt":"2026-09-14T15:23:07.476Z","slug":"CVE-2026-80945","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: iaa - unmap dst before software fallback on decompress\n\nOn a hardware analytics error, decompress retries through the software\nfallback, which writes req->dst with the CPU while it is still mapped\nDMA_FROM_DEVICE. With SWIOTLB active the later dma_unmap_sg() copies the\nstale bounce buffer over req->dst, corrupting the result.\n\nUnmap before the fallback runs. The async path unmaps inline; the sync\npath signals the retry with -EAGAIN so iaa_comp_adecompress() runs the\nfallback after unmapping.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80945.json)","depth":"midnight","depthScore":50,"depthScoreParts":{"impact":50.1,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":208394,"id":"CVE-2026-80945","ts":1789997916560,"field":"cvss","old":"7","new":"9.1"},{"seq":208393,"id":"CVE-2026-80945","ts":1789997916560,"field":"severity","old":"high","new":"critical"},{"seq":202736,"id":"CVE-2026-80945","ts":1789403715364,"field":"cvss","old":"9.1","new":"7"},{"seq":202735,"id":"CVE-2026-80945","ts":1789403715364,"field":"severity","old":"critical","new":"high"},{"seq":183624,"id":"CVE-2026-80945","ts":1789356676150,"field":"cvss","old":"9.1","new":"5.7"},{"seq":183623,"id":"CVE-2026-80945","ts":1789356676150,"field":"severity","old":"critical","new":"medium"},{"seq":153128,"id":"CVE-2026-80945","ts":1789285349141,"field":"cvss","old":null,"new":"9.1"},{"seq":153127,"id":"CVE-2026-80945","ts":1789285349141,"field":"severity","old":"none","new":"critical"},{"seq":147538,"id":"CVE-2026-80945","ts":1789270211301,"field":"cvss","old":null,"new":"5.7"},{"seq":147537,"id":"CVE-2026-80945","ts":1789270211301,"field":"severity","old":"none","new":"medium"},{"seq":109290,"id":"CVE-2026-80945","ts":1789183731299,"field":"cvss","old":null,"new":"5.7"},{"seq":109289,"id":"CVE-2026-80945","ts":1789183731299,"field":"severity","old":"none","new":"medium"}]}