CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's handling of the cleaner shader in the AMD GPU driver, where an incorrect allocation leads to a buffer overflow due to excessive data being written into a 64-byte buffer. This can result in a kernel page fault, potentially leading to system instability or crashes. Organizations utilizing Linux systems with AMD GPUs should prioritize addressing this issue to maintain system integrity and prevent potential disruptions.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/gfx: fix cleaner shader IB buffer overflow The cleaner shader sysfs path allocates a 16-dword (64 byte) IB but incorrectly fills (align_mask + 1) dwords. On GFX rings align_mask is 0xff, so the loop wrote 256 dwords into a 64-byte buffer, causing a kernel page fault. The IB only needs to be a minimal NOP shell to schedule the job; the cleaner shader itself is emitted on the ring via emit_cleaner_shader(). Fill 16 dwords to match the allocation. v2: Use ib_size_dw variable (Lijo) (cherry picked from commit bf21af331ebf72d0935fd70c73192414a422c03a)