{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2"
            },
            {
              "fixed": "3747de241a66ef2c7032d2cc2b826a47c5fa0f6a"
            },
            {
              "fixed": "ecfe9171b26ae3eed0cd8bab7a943e9e2c9e51ba"
            },
            {
              "fixed": "82b3e7ce10c53fc12aab8904745603efc74f8c07"
            },
            {
              "fixed": "ede69b8f6670600e534591664584f810d7c385f9"
            },
            {
              "fixed": "c68517a3e18e20997808821c5559d0cba4d776c1"
            },
            {
              "fixed": "5d39580f68e6ddeedd15e587282207489dfb3da2"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.12"
            },
            {
              "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-2026-53236.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: restrict SO_ATTACH_FILTER to priv users\n\nThis patch restricts the use of SO_ATTACH_FILTER (cBPF) on TCP sockets\nto users with CAP_NET_ADMIN capability.\n\nThis blocks potential side-channel attack where an unprivileged application\nattaches a filter to leak TCP sequence/acknowledgment numbers.",
  "id": "CVE-2026-53236",
  "modified": "2026-07-08T05:36:04.225095439Z",
  "published": "2026-06-25T08:39:33.170Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3747de241a66ef2c7032d2cc2b826a47c5fa0f6a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5d39580f68e6ddeedd15e587282207489dfb3da2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/82b3e7ce10c53fc12aab8904745603efc74f8c07"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c68517a3e18e20997808821c5559d0cba4d776c1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ecfe9171b26ae3eed0cd8bab7a943e9e2c9e51ba"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ede69b8f6670600e534591664584f810d7c385f9"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53236.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53236"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "summary": "tcp: restrict SO_ATTACH_FILTER to priv users"
}