CVE-2026-31767 (GCVE-0-2026-31767)
Vulnerability from cvelistv5
Published
2026-05-01 14:14
Modified
2026-05-11 22:15
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/i915/dsi: Don't do DSC horizontal timing adjustments in command mode Stop adjusting the horizontal timing values based on the compression ratio in command mode. Bspec seems to be telling us to do this only in video mode, and this is also how the Windows driver does things. This should also fix a div-by-zero on some machines because the adjusted htotal ends up being so small that we end up with line_time_us==0 when trying to determine the vtotal value in command mode. Note that this doesn't actually make the display on the Huawei Matebook E work, but at least the kernel no longer explodes when the driver loads. (cherry picked from commit 0b475e91ecc2313207196c6d7fd5c53e1a878525)
References
Impacted products
Vendor Product Version
Linux Linux Version: 53693f02d80e0a909e76c2a25f8aac8515f959db
Version: 53693f02d80e0a909e76c2a25f8aac8515f959db
Version: 53693f02d80e0a909e76c2a25f8aac8515f959db
Version: 53693f02d80e0a909e76c2a25f8aac8515f959db
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{
  "containers": {
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        {
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          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/i915/display/icl_dsi.c"
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              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/i915/dsi: Don\u0027t do DSC horizontal timing adjustments in command mode\n\nStop adjusting the horizontal timing values based on the\ncompression ratio in command mode. Bspec seems to be telling\nus to do this only in video mode, and this is also how the\nWindows driver does things.\n\nThis should also fix a div-by-zero on some machines because\nthe adjusted htotal ends up being so small that we end up with\nline_time_us==0 when trying to determine the vtotal value in\ncommand mode.\n\nNote that this doesn\u0027t actually make the display on the\nHuawei Matebook E work, but at least the kernel no longer\nexplodes when the driver loads.\n\n(cherry picked from commit 0b475e91ecc2313207196c6d7fd5c53e1a878525)"
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T22:15:25.089Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/55efe8402f46af8399c8b634a18b130a05fd7820"
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          "url": "https://git.kernel.org/stable/c/86e926b108880c0109b8635e459450447156aeb7"
        },
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        },
        {
          "url": "https://git.kernel.org/stable/c/4dfce79e098915d8e5fc2b9e1d980bc3251dd32c"
        }
      ],
      "title": "drm/i915/dsi: Don\u0027t do DSC horizontal timing adjustments in command mode",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31767",
    "datePublished": "2026-05-01T14:14:57.287Z",
    "dateReserved": "2026-03-09T15:48:24.140Z",
    "dateUpdated": "2026-05-11T22:15:25.089Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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