CVE-2026-68276 (GCVE-0-2026-68276)

Vulnerability from cvelistv5 – Published: 2026-08-10 12:01 – Updated: 2026-08-17 05:02
VLAI
Title
drm/amdgpu/gfx: fix cleaner shader IB buffer overflow
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)
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6641 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: d361ad5d2fc0e4d59d5d538092c9b37889756642 , < 201633f47b542a99bb7baafdfcda7781249fb3d9 (git)
Affected: d361ad5d2fc0e4d59d5d538092c9b37889756642 , < e28420e36542ae8b66a5bdcec419525f521bddf8 (git)
Affected: d361ad5d2fc0e4d59d5d538092c9b37889756642 , < 9cd9a983769a4d0e9cc80a287316ee79685d38b3 (git)
Affected: d361ad5d2fc0e4d59d5d538092c9b37889756642 , < 3e864bf2a32a1cbdf1e0f9c5a5a4176e8575f4a3 (git)
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Linux Linux Affected: 6.12
Unaffected: 0 , < 6.12 (semver)
Unaffected: 6.12.103 , ≤ 6.12.* (semver)
Unaffected: 6.18.42 , ≤ 6.18.* (semver)
Unaffected: 7.1.6 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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    "dateReserved": "2026-07-30T09:28:09.379Z",
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu/gfx: fix cleaner shader IB buffer overflow\n\nThe cleaner shader sysfs path allocates a 16-dword (64 byte) IB but\nincorrectly fills (align_mask + 1) dwords. On GFX rings align_mask is\n0xff, so the loop wrote 256 dwords into a 64-byte buffer, causing a\nkernel page fault.\n\nThe IB only needs to be a minimal NOP shell to schedule the job; the\ncleaner shader itself is emitted on the ring via emit_cleaner_shader().\nFill 16 dwords to match the allocation.\n\nv2: Use ib_size_dw variable (Lijo)\n\n(cherry picked from commit bf21af331ebf72d0935fd70c73192414a422c03a)"
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        "lastModified": "2026-08-17T05:18:30.190",
        "metrics": {},
        "published": "2026-08-10T13:20:16.693",
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  }
}



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