{"id":"CVE-2026-80945","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-80945","summary":"crypto: iaa - unmap dst before software fallback on decompress","details":"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 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.","published":"2026-09-11T19:42:16.824Z","modified":"2026-09-14T03:45:53.669779851Z","cvss":{"score":9.1,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"6.18.51"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/94a25930477113730372e0fa2985da4c5ac95c9a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fc933a4a419ba8a75da28666a018602c44846953"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fcd86180ef78b0e41763faef7c6d2de7dfb50c1a"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80945.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80945"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-14T03:45:53.669779851Z"}}