CVE-2026-68106

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)

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxd38ceaf99ed015f2a0b9af3499791bd3a3daae21 < 004d0453cfef16f056cb7b8bc04f69f19cf9df32affected
LinuxLinuxd38ceaf99ed015f2a0b9af3499791bd3a3daae21 < 00ee64910ecf748cc15b23bbcbea472c203ec1e8affected
LinuxLinuxd38ceaf99ed015f2a0b9af3499791bd3a3daae21 < 81c9b4921f62d1642b9d775524ae9240e521a5edaffected
LinuxLinuxd38ceaf99ed015f2a0b9af3499791bd3a3daae21 < 52f9a588296432accf2982f7d258192a37562f4faffected
LinuxLinuxd38ceaf99ed015f2a0b9af3499791bd3a3daae21 < a00946b5ab7c25da5685ca9c58f50ff6f43c0fdfaffected
LinuxLinuxd38ceaf99ed015f2a0b9af3499791bd3a3daae21 < ffb33d466a68cea3e8a3dbed04d79037a3cbabd1affected
LinuxLinuxd38ceaf99ed015f2a0b9af3499791bd3a3daae21 < be725ab23aa45c11a5afef3e2a9f6d8c084ae5dcaffected
LinuxLinuxd38ceaf99ed015f2a0b9af3499791bd3a3daae21 < 0c01c811be47e6b146552dd59bfedbea8f09b8f4affected
LinuxLinux4.2affected
LinuxLinux0 < 4.2unaffected
LinuxLinux5.10.265 <= 5.10.*unaffected
LinuxLinux5.15.216 <= 5.15.*unaffected
LinuxLinux6.1.183 <= 6.1.*unaffected
LinuxLinux6.6.148 <= 6.6.*unaffected
LinuxLinux6.12.101 <= 6.12.*unaffected
LinuxLinux6.18.42 <= 6.18.*unaffected
LinuxLinux7.1.6 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References