{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "bdc62f2bae8fb0e8e99574de5232f0a3c54a27df"
            },
            {
              "fixed": "f6dcbf2b024d55549959402f1db6c614e51d52cb"
            },
            {
              "fixed": "f4e608fe12b7ac6a4a57176ab0296bb5a110a078"
            },
            {
              "fixed": "98429e9ec89a5e3a204112dfaa2dbe6ca28493a0"
            },
            {
              "fixed": "d2d8c17ac01a1b1f638ea5d340a884ccc5015186"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.5.0"
            },
            {
              "fixed": "6.12.81"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.22"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.12"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31729.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: ucsi: validate connector number in ucsi_notify_common()\n\nThe connector number extracted from CCI via UCSI_CCI_CONNECTOR() is a\n7-bit field (0-127) that is used to index into the connector array in\nucsi_connector_change(). However, the array is only allocated for the\nnumber of connectors reported by the device (typically 2-4 entries).\n\nA malicious or malfunctioning device could report an out-of-range\nconnector number in the CCI, causing an out-of-bounds array access in\nucsi_connector_change().\n\nAdd a bounds check in ucsi_notify_common(), the central point where CCI\nis parsed after arriving from hardware, so that bogus connector numbers\nare rejected before they propagate further.",
  "id": "CVE-2026-31729",
  "modified": "2026-08-12T03:51:08.721658355Z",
  "published": "2026-05-01T14:14:28.868Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/98429e9ec89a5e3a204112dfaa2dbe6ca28493a0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d2d8c17ac01a1b1f638ea5d340a884ccc5015186"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f4e608fe12b7ac6a4a57176ab0296bb5a110a078"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f6dcbf2b024d55549959402f1db6c614e51d52cb"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31729.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31729"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "usb: typec: ucsi: validate connector number in ucsi_notify_common()"
}