SB2026091309 - Improper control of a resource through its lifetime in Linux kernel intel iaa driver

Description

This security bulletin contains information about 1 vulnerability.

1) Improper control of a resource through its lifetime (CVE-ID: CVE-2026-80945)

CWE-ID: CWE-664 - Improper control of a resource through its lifetime

CVSSv4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a local user to corrupt decompression results.

The vulnerability exists due to improper DMA mapping lifecycle management in the Intel IAA decompression fallback when processing a software fallback after a hardware analytics error. A local user can trigger the software fallback before the destination buffer is unmapped to corrupt decompression results.

Corruption occurs when SWIOTLB is active and a stale bounce buffer is copied during DMA unmapping.

Remediation

Install update from vendor's website.

References

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