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CVE-2026-93234

Estado: RecibidaSin puntuar—

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.

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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.

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-93234",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "40e1a70b4aedf2859a1829991b48ef0ebe650bf2",
              "lessThan": "676f1fb3632bbc9ce83be7938e93fe6bfc9510fd",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "40e1a70b4aedf2859a1829991b48ef0ebe650bf2",
              "lessThan": "06fcaf21c18ac88f57fee3803554f48c6026b95f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "40e1a70b4aedf2859a1829991b48ef0ebe650bf2",
              "lessThan": "082e378886547b5b1c4075ed307f7c68547868dc",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "40e1a70b4aedf2859a1829991b48ef0ebe650bf2",
              "lessThan": "70cffc31a380b3eae45027101647aa94c242aa0e",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "40e1a70b4aedf2859a1829991b48ef0ebe650bf2",
              "lessThan": "72a95df6bbc7d20c7af1e39d86b3e910cccd01ad",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "40e1a70b4aedf2859a1829991b48ef0ebe650bf2",
              "lessThan": "eab46d9629807db1b5647d17227e16110a18227f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "40e1a70b4aedf2859a1829991b48ef0ebe650bf2",
              "lessThan": "da1ea35fea67ad841f4ada28dd61b41be65e5437",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/gpu/drm/gud/gud_connector.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.13"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "5.13",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.51",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.5",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3-rc2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/gpu/drm/gud/gud_connector.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-24T16:17:19.007",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/06fcaf21c18ac88f57fee3803554f48c6026b95f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/082e378886547b5b1c4075ed307f7c68547868dc",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/676f1fb3632bbc9ce83be7938e93fe6bfc9510fd",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/70cffc31a380b3eae45027101647aa94c242aa0e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/72a95df6bbc7d20c7af1e39d86b3e910cccd01ad",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/da1ea35fea67ad841f4ada28dd61b41be65e5437",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/eab46d9629807db1b5647d17227e16110a18227f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "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."
    }
  ],
  "lastModified": "2026-09-24T16:17:19.007",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}