CVE-2026-46276

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A flaw exists in the drm/amdgpu component where the kernel crashes during the modprobe of the amdgpu driver on RDNA4 (GFX 12) hardware, such as the RX 9070 XT. This occurs because the amdgpu ttm init() function calls amdgpu ttm init on chip() for GDS, GWS, and OA on-chip memory resources regardless of their size. On RDNA4 hardware, these resources are absent and have a size of zero. When amdgpu ttm init on chip() forwards the call to ttm range man init(), it triggers drm mm init(mm, 0, 0), which leads to a DRM MM BUG ON() assertion and a subsequent kernel crash if CONFIG DRM DEBUG MM is enabled.

Recommendations Update to the kernel-devel-7.0.12-1.1 package or a newer version that includes the fix.