crypto: iaa - unmap dst before software fallback on decompress

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Summary

CVECVE-2026-80945
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-11 20:19:00 UTC
Updated2026-09-11 20:19:00 UTC
DescriptionIn 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 2ec6761df889fdf896fde761abd447596dd8f8c2 fc933a4a419ba8a75da28666a018602c44846953 git Not specified
CNA Linux Linux affected 2ec6761df889fdf896fde761abd447596dd8f8c2 fcd86180ef78b0e41763faef7c6d2de7dfb50c1a git Not specified
CNA Linux Linux affected 2ec6761df889fdf896fde761abd447596dd8f8c2 94a25930477113730372e0fa2985da4c5ac95c9a git Not specified
CNA Linux Linux affected 6.8 Not specified
CNA Linux Linux unaffected 6.8 semver Not specified
CNA Linux Linux unaffected 6.18.51 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.4 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/94a25930477113730372e0fa2985da4c5ac95c9a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/fcd86180ef78b0e41763faef7c6d2de7dfb50c1a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/fc933a4a419ba8a75da28666a018602c44846953 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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