FKIE_CVE-2026-53139

Vulnerability from fkie_nvd - Published: 2026-06-25 09:16 - Updated: 2026-06-30 14:44
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/v3d: Skip CSD when it has zeroed workgroups A compute shader dispatch encodes its workgroup counts in the CFG0..CFG2 registers. Kicking off a dispatch with a zero count in any of the three dimensions is invalid. First, the hardware will process 0 as 65536, while the user-space driver exposes a maximum of 65535. Over that, a submission with a zeroed workgroup dimension should be a no-op. These zeroed counts can reach the dispatch path through an indirect CSD job, whose workgroup counts are only known once the indirect buffer is read and may legitimately be zero, but such scenario should only result in a no-op. Overwrite the indirect CSD job workgroup counts with the indirect BO ones, even if they are zeroed, and don't submit the job to the hardware when any of the workgroup counts is zero, so the job completes immediately instead of running the shader.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/11e6432836394e00d39e468cd514f9ddb66f1e49
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7f93fad5ea0affc9e1505dd0f7596c0fdb496213
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9655b56b6de918e1c22b92f3880ae41b052cbd00
Impacted products
Vendor Product Version
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{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/v3d/v3d_sched.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "9655b56b6de918e1c22b92f3880ae41b052cbd00",
              "status": "affected",
              "version": "d223f98f02099b002903b9b22b56febae16ef80d",
              "versionType": "git"
            },
            {
              "lessThan": "11e6432836394e00d39e468cd514f9ddb66f1e49",
              "status": "affected",
              "version": "d223f98f02099b002903b9b22b56febae16ef80d",
              "versionType": "git"
            },
            {
              "lessThan": "7f93fad5ea0affc9e1505dd0f7596c0fdb496213",
              "status": "affected",
              "version": "d223f98f02099b002903b9b22b56febae16ef80d",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/v3d/v3d_sched.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.3"
            },
            {
              "lessThan": "5.3",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.36",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/v3d: Skip CSD when it has zeroed workgroups\n\nA compute shader dispatch encodes its workgroup counts in the CFG0..CFG2\nregisters. Kicking off a dispatch with a zero count in any of the three\ndimensions is invalid. First, the hardware will process 0 as 65536,\nwhile the user-space driver exposes a maximum of 65535. Over that, a\nsubmission with a zeroed workgroup dimension should be a no-op.\n\nThese zeroed counts can reach the dispatch path through an indirect CSD\njob, whose workgroup counts are only known once the indirect buffer is\nread and may legitimately be zero, but such scenario should only result in\na no-op.\n\nOverwrite the indirect CSD job workgroup counts with the indirect BO\nones, even if they are zeroed, and don\u0027t submit the job to the hardware\nwhen any of the workgroup counts is zero, so the job completes immediately\ninstead of running the shader."
    }
  ],
  "id": "CVE-2026-53139",
  "lastModified": "2026-06-30T14:44:27.313",
  "metrics": {},
  "published": "2026-06-25T09:16:31.247",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/11e6432836394e00d39e468cd514f9ddb66f1e49"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7f93fad5ea0affc9e1505dd0f7596c0fdb496213"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9655b56b6de918e1c22b92f3880ae41b052cbd00"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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