CVE-2026-80907 drm/amdgpu: Fix UVD dpb min size calculation for H264

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: Fix UVD dpb min size calculation for H264 This should use actual number of references from the decode message, instead of maximum derived from level. cherry picked from commit 64b525edb7e7bdfcdc77883c5e413804e2396856...

CVE-2026-80907

This CVE affects the drm/amdgpu driver in the Linux kernel, specifically the UVD (Unified Video Decoder) subsystem used for hardware-accelerated H.264 decoding. The bug is an incorrect DPB (Decoded Picture Buffer) minimum size calculation : the code derived the number of reference frames from the...