CVE-2026-80945

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinux2ec6761df889fdf896fde761abd447596dd8f8c2 < fc933a4a419ba8a75da28666a018602c44846953affected
LinuxLinux2ec6761df889fdf896fde761abd447596dd8f8c2 < fcd86180ef78b0e41763faef7c6d2de7dfb50c1aaffected
LinuxLinux2ec6761df889fdf896fde761abd447596dd8f8c2 < 94a25930477113730372e0fa2985da4c5ac95c9aaffected
LinuxLinux6.8affected
LinuxLinux0 < 6.8unaffected
LinuxLinux6.18.51 <= 6.18.*unaffected
LinuxLinux7.2.4 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References