Out-of-bounds write in Linux kernel - CVE-2026-80576

Vulnerability details

The vulnerability allows a local user to corrupt memory and cause a denial of service.

The vulnerability exists due to an out-of-bounds write in amdgpu_cs_p2_ib() when processing user-supplied indirect buffer lengths for command submission. A local user can submit an oversized indirect buffer to corrupt memory and cause a denial of service.

The issue affects GFX rings and can destabilize command submission because the indirect buffer length is encoded into packet control fields.

Affected software

How to mitigate CVE-2026-80576

External References

• https://git.kernel.org/stable/c/07fe270ec07c138a70afe7a81e115a85c35c545c
• https://git.kernel.org/stable/c/1474f3970d1afd303e12ff14d06808eabb371576
• https://git.kernel.org/stable/c/6e164ba1057175fb8a370d8e05cbff5c57eac0c8
• https://git.kernel.org/stable/c/fd37f9dd5b5ab70a46fa7bc76623c0528d602b27

Related Security Bulletins

• Out-of-bounds write in Linux kernel amd amdgpu driver