CVE-2026-80945crypto: iaa - unmap dst before software fallback on decompress
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: crypto: iaa - unmap dst before software fallback on decompress On a hardware analytics error, decompress retries through the software fallback, which writes req->dst with the CPU while it is still mapped DMA_FROM_DEVICE. With SWIOTLB active the later dma_unmap_sg() copies the stale bounce buffer over req->dst, corrupting the result. Unmap before the fallback runs. The async path unmaps inline; the sync path signals the retry with -EAGAIN so iaa_comp_adecompress() runs the fallback after unmapping.
- CVSS
- 9.1 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 21, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 2ec6761df889fdf896fde761abd447596dd8f8c2 before c0279e5ea2aad99d8b91f1a6579d751cc9eb2408; from 2ec6761df889fdf896fde761abd447596dd8f8c2 before fc933a4a419ba8a75da28666a018602c44846953; from 2ec6761df889fdf896fde761abd447596dd8f8c2 before fcd86180ef78b0e41763faef7c6d2de7dfb50c1a; from 2ec6761df889fdf896fde761abd447596dd8f8c2 before 94a25930477113730372e0fa2985da4c5ac95c9a | CNA record |
References
- https://git.kernel.org/stable/c/c0279e5ea2aad99d8b91f1a6579d751cc9eb2408
- https://git.kernel.org/stable/c/fc933a4a419ba8a75da28666a018602c44846953
- https://git.kernel.org/stable/c/fcd86180ef78b0e41763faef7c6d2de7dfb50c1a
- https://git.kernel.org/stable/c/94a25930477113730372e0fa2985da4c5ac95c9a
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.