Riskcovery

CVE-2026-80945

crypto: iaa - unmap dst before software fallback on decompress

State
Published
Severity
9.1 Critical
Published
Sep 11, 2026
Updated
Oct 19, 2026
Reserved
Aug 26, 2026

Read the record on cve.org

Description

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.

Scores

CVSSScoreVectorSource
3.19.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:NLinux

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 2ec6761df889fdf896fde761abd447596dd8f8c2 to before c0279e5ea2aad99d8b91f1a6579d751cc9eb2408Affected
  • 2ec6761df889fdf896fde761abd447596dd8f8c2 to before fc933a4a419ba8a75da28666a018602c44846953Affected
  • 2ec6761df889fdf896fde761abd447596dd8f8c2 to before fcd86180ef78b0e41763faef7c6d2de7dfb50c1aAffected
  • 2ec6761df889fdf896fde761abd447596dd8f8c2 to before 94a25930477113730372e0fa2985da4c5ac95c9aAffected
LinuxLinux
  • 6.8Affected
  • before 6.8Not affected
  • 6.12.111 through 6.12.*Not affected
  • 6.18.51 through 6.18.*Not affected
  • 7.2.4 through 7.2.*Not affected
  • 7.3 and laterNot affected

References

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