drm/amdgpu: fix division by zero with invalid uvd dimensions

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: fix division by zero with invalid uvd dimensions When width or height is less than 16, width_in_mb or height_in_mb becomes 0, leading to fs_in_mb being 0. This causes a division by zero when calculating num_dpb_buffer in H264 and H264 Perf decode paths. Add validation to reject frames with width < 16 or height < 16 before performing any calculations that depend on these values. V2: Format change - move up all vaiable definitions. V3: Use warn_once to avoid spam. (cherry picked from commit 3e41d26c70b0a459d041cc19482a226c4b7423cb)

Timeline

1. Aug 10, 2026, 11:58 AM UTCCVE published
2. Oct 16, 2026, 3:43 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: total

3. Oct 19, 2026, 8:58 PM UTCRecord last updated

Affected versions

• Linux Linux

  From d38ceaf99ed015f2a0b9af3499791bd3a3daae21 · fixed in 004d0453cfef16f056cb7b8bc04f69f19cf9df32; From d38ceaf99ed015f2a0b9af3499791bd3a3daae21 · fixed in 00ee64910ecf748cc15b23bbcbea472c203ec1e8; From d38ceaf99ed015f2a0b9af3499791bd3a3daae21 · fixed in 81c9b4921f62d1642b9d775524ae9240e521a5ed; From d38ceaf99ed015f2a0b9af3499791bd3a3daae21 · fixed in 52f9a588296432accf2982f7d258192a37562f4f; From d38ceaf99ed015f2a0b9af3499791bd3a3daae21 · fixed in a00946b5ab7c25da5685ca9c58f50ff6f43c0fdf; From d38ceaf99ed015f2a0b9af3499791bd3a3daae21 · fixed in ffb33d466a68cea3e8a3dbed04d79037a3cbabd1; From d38ceaf99ed015f2a0b9af3499791bd3a3daae21 · fixed in be725ab23aa45c11a5afef3e2a9f6d8c084ae5dc; From d38ceaf99ed015f2a0b9af3499791bd3a3daae21 · fixed in 0c01c811be47e6b146552dd59bfedbea8f09b8f4

• Linux Linux

  4.2

• KernelLinux

  From 4.2.0 · fixed in 5.10.265; From 5.11.0 · fixed in 5.15.216; From 5.16.0 · fixed in 6.1.183; From 6.2.0 · fixed in 6.6.148; From 6.7.0 · fixed in 6.12.101; From 6.13.0 · fixed in 6.18.42; From 6.19.0 · fixed in 7.1.6

References 8