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
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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{
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    "datePublished": "2026-08-10T12:01:51.789Z",
    "dateReserved": "2026-07-30T09:28:09.379Z",
    "dateUpdated": "2026-08-17T05:02:10.194Z",
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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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      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-68276.json",
      "version": "4"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.