CVE-2026-53139 (GCVE-0-2026-53139)
Vulnerability from cvelistv5
Published
2026-06-25 08:38
Modified
2026-07-04 11:50
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
Impacted products
Vendor Product Version
Linux Linux Version: d223f98f02099b002903b9b22b56febae16ef80d
Version: d223f98f02099b002903b9b22b56febae16ef80d
Version: d223f98f02099b002903b9b22b56febae16ef80d
Version: d223f98f02099b002903b9b22b56febae16ef80d
Version: d223f98f02099b002903b9b22b56febae16ef80d
Version: d223f98f02099b002903b9b22b56febae16ef80d
Version: d223f98f02099b002903b9b22b56febae16ef80d
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{
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      "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-04T11:50:52.146Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
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          "url": "https://git.kernel.org/stable/c/abb069fdf51a9ddabcc1ed125dafe54e2089900b"
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          "url": "https://git.kernel.org/stable/c/ad166139d123dc162e8636f0c7962516d04074e1"
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        {
          "url": "https://git.kernel.org/stable/c/7f93fad5ea0affc9e1505dd0f7596c0fdb496213"
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      "title": "drm/v3d: Skip CSD when it has zeroed workgroups",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53139",
    "datePublished": "2026-06-25T08:38:27.738Z",
    "dateReserved": "2026-06-09T07:44:35.387Z",
    "dateUpdated": "2026-07-04T11:50:52.146Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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