{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "8cc44579d1bd77ba3a32f2cb76fd9669c229c5fd"
            },
            {
              "fixed": "975a84fd741440853380d37465b6e226cf47254c"
            },
            {
              "fixed": "672f0f3b8f875ffe6525a37847eafa7648c4c0c6"
            },
            {
              "fixed": "95bda3eac0b1454c2cee98d58d9ba6dd8391e843"
            },
            {
              "fixed": "07a18f5c90dd3d586b73242f5a5bbf0a72f2fdc6"
            },
            {
              "fixed": "71c52da13c3737493b42d20d9f33de34e03b3156"
            },
            {
              "fixed": "0c4bb32ad7fdc2dc6a8050f41eb04d4bda56b6c8"
            },
            {
              "fixed": "ccfe292a966079c61ea68a2da303b2a336170993"
            },
            {
              "fixed": "9772589b57e44aedc240211c5c3f7a684a034d3a"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.25"
            },
            {
              "fixed": "5.10.259"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.210"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.176"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.143"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.94"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.36"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.13"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53238.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetlabel: validate unlabeled address and mask attribute lengths\n\nnetlbl_unlabel_addrinfo_get() used the address attribute length to\ndetermine whether the attribute data could be read as an IPv4 or IPv6\naddress, but did not independently validate the corresponding mask\nattribute length.  A crafted Generic Netlink request could therefore\nprovide a valid IPv4/IPv6 address attribute with a shorter mask\nattribute, which would later be read as a full struct in_addr or\nstruct in6_addr.\n\nNLA_BINARY policy lengths are maximum lengths by default, so use\nNLA_POLICY_EXACT_LEN() for the unlabeled IPv4/IPv6 address and mask\nattributes.  This rejects short attributes during policy validation and\nalso exposes the exact length requirements through policy introspection.",
  "id": "CVE-2026-53238",
  "modified": "2026-07-15T01:48:51.161893362Z",
  "published": "2026-06-25T08:39:34.492Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/07a18f5c90dd3d586b73242f5a5bbf0a72f2fdc6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0c4bb32ad7fdc2dc6a8050f41eb04d4bda56b6c8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/672f0f3b8f875ffe6525a37847eafa7648c4c0c6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/71c52da13c3737493b42d20d9f33de34e03b3156"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/95bda3eac0b1454c2cee98d58d9ba6dd8391e843"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/975a84fd741440853380d37465b6e226cf47254c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9772589b57e44aedc240211c5c3f7a684a034d3a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ccfe292a966079c61ea68a2da303b2a336170993"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53238.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53238"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "netlabel: validate unlabeled address and mask attribute lengths"
}