Vulnerability 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)
References
- https://git.kernel.org/stable/c/201633f47b542a99bb7baafdfcda7781249fb3d9
- https://git.kernel.org/stable/c/3e864bf2a32a1cbdf1e0f9c5a5a4176e8575f4a3
- https://git.kernel.org/stable/c/9cd9a983769a4d0e9cc80a287316ee79685d38b3
- https://git.kernel.org/stable/c/e28420e36542ae8b66a5bdcec419525f521bddf8
FAQ
What is CVE-2026-68276?
CVE-2026-68276 is a documented vulnerability. 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 incorrec...
How severe is CVE-2026-68276?
CVSS scoring is not yet available for CVE-2026-68276. Check NVD for updates.
Is there a patch for CVE-2026-68276?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.