What’s Vulnerable › Vulnerabilities

CVE-2026-80945: crypto: iaa - unmap dst before software fallback on decompress

• Severity: critical (CVSS 9.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-11 · updated 2026-10-19

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.

Affected products

• Linux kernel: 6.8 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/94a25930477113730372e0fa2985da4c5ac95c9a
• https://git.kernel.org/stable/c/c0279e5ea2aad99d8b91f1a6579d751cc9eb2408
• https://git.kernel.org/stable/c/fc933a4a419ba8a75da28666a018602c44846953
• https://git.kernel.org/stable/c/fcd86180ef78b0e41763faef7c6d2de7dfb50c1a

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