CVE-2026-68276

Summary

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)

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxd361ad5d2fc0e4d59d5d538092c9b37889756642 < 201633f47b542a99bb7baafdfcda7781249fb3d9affected
LinuxLinuxd361ad5d2fc0e4d59d5d538092c9b37889756642 < e28420e36542ae8b66a5bdcec419525f521bddf8affected
LinuxLinuxd361ad5d2fc0e4d59d5d538092c9b37889756642 < 9cd9a983769a4d0e9cc80a287316ee79685d38b3affected
LinuxLinuxd361ad5d2fc0e4d59d5d538092c9b37889756642 < 3e864bf2a32a1cbdf1e0f9c5a5a4176e8575f4a3affected
LinuxLinux6.12affected
LinuxLinux0 < 6.12unaffected
LinuxLinux6.12.103 <= 6.12.*unaffected
LinuxLinux6.18.42 <= 6.18.*unaffected
LinuxLinux7.1.6 <= 7.1.*unaffected
LinuxLinux7.2-rc1 <= *unaffected

Weaknesses

References