CVE-2026-80576
Description
AI Translation Available
In the Linux kernel, the following vulnerability has been resolved:
drm/amdgpu: reject oversized IBs with per-ring packet limits
On GFX rings, amdgpu_cs_p2_ib() passed user-supplied ib_bytes through
to ib->length_dw without a limit, while ring_emit_ib() encodes length
into packet fields. Oversized values can corrupt adjacent control bits
and destabilize command submission.
Add a per-ring IB packet size limit helper and reject command
submissions exceeding the corresponding dword limit before IB
allocation. Use the documented 20-bit limit for GFX/compute/SDMA/VPE,
and apply the MM fallback limit for other ring types.
(cherry picked from commit 7f48fa2cf62e3fa6c9c3870aa74988f773247e52)
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