CVE-2026-93234 (GCVE-0-2026-93234)
Vulnerability from cvelistv5
Published
2026-09-24 15:33
Modified
2026-10-19 09:07
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/gud: validate TV mode names before creating enum property The GUD protocol returns TV mode names as fixed-size GUD_CONNECTOR_TV_MODE_NAME_LEN entries and requires each name to be NUL-terminated. gud_connector_add_tv_mode() currently passes each fixed-size entry directly to drm_mode_create_tv_properties_legacy(), which eventually reaches drm_property_add_enum() and strlen(). If a device returns an entry without a terminating NUL byte, strlen() reads past the end of the slot and can run beyond the allocated buffer, triggering an out-of-bounds read. Validate that each returned TV mode name contains a NUL terminator within its fixed-size slot before passing it to the DRM property code. If a malformed entry is found, reject the device response with -EIO. This fixes the out-of-bounds read without changing the handling of valid devices, and avoids silently truncating malformed protocol data.
References
Impacted products
Vendor Product Version
Linux Linux Version: 40e1a70b4aedf2859a1829991b48ef0ebe650bf2
Version: 40e1a70b4aedf2859a1829991b48ef0ebe650bf2
Version: 40e1a70b4aedf2859a1829991b48ef0ebe650bf2
Version: 40e1a70b4aedf2859a1829991b48ef0ebe650bf2
Version: 40e1a70b4aedf2859a1829991b48ef0ebe650bf2
Version: 40e1a70b4aedf2859a1829991b48ef0ebe650bf2
Version: 40e1a70b4aedf2859a1829991b48ef0ebe650bf2
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{
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/gud: validate TV mode names before creating enum property\n\nThe GUD protocol returns TV mode names as fixed-size\nGUD_CONNECTOR_TV_MODE_NAME_LEN entries and requires each name to be\nNUL-terminated.\n\ngud_connector_add_tv_mode() currently passes each fixed-size entry\ndirectly to drm_mode_create_tv_properties_legacy(), which eventually\nreaches drm_property_add_enum() and strlen(). If a device returns an\nentry without a terminating NUL byte, strlen() reads past the end of\nthe slot and can run beyond the allocated buffer, triggering an\nout-of-bounds read.\n\nValidate that each returned TV mode name contains a NUL terminator\nwithin its fixed-size slot before passing it to the DRM property code.\nIf a malformed entry is found, reject the device response with -EIO.\n\nThis fixes the out-of-bounds read without changing the handling of\nvalid devices, and avoids silently truncating malformed protocol data."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:07:45.893Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/06fcaf21c18ac88f57fee3803554f48c6026b95f"
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        },
        {
          "url": "https://git.kernel.org/stable/c/da1ea35fea67ad841f4ada28dd61b41be65e5437"
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      "title": "drm/gud: validate TV mode names before creating enum property",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-93234",
    "datePublished": "2026-09-24T15:33:31.617Z",
    "dateReserved": "2026-09-17T16:02:15.095Z",
    "dateUpdated": "2026-10-19T09:07:45.893Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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