{"id":"CVE-2026-72243","title":"selinux: check connect-related permissions on TCP Fast Open","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nselinux: check connect-related permissions on TCP Fast Open\n\nSimilar to Landlock, SELinux was not updated when TCP Fast Open\nsupport was introduced to ensure connect-re…","severity":"high","cvss":8.4,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= cf60af03ca4e71134206809ea892e49b92a88896 < 11406d0d7e11b4e525bb2ace2c70107031d058da","Linux >= cf60af03ca4e71134206809ea892e49b92a88896 < e507633bf76bccf1a6af27771fb0d6e2862b7eac","Linux >= cf60af03ca4e71134206809ea892e49b92a88896 < d028bc080a0dcd6a7f8e1ae1bd32dda696505ba3","Linux >= cf60af03ca4e71134206809ea892e49b92a88896 < fc633a598206d4f23af782db7c0b5f3a82751d2c","Linux >= cf60af03ca4e71134206809ea892e49b92a88896 < 646ebbc5f2ff9147d084e1213143f091026a611c","Linux >= cf60af03ca4e71134206809ea892e49b92a88896 < 44c74d27d1b9aaa99fa8a83640c1223575262b80","Linux 3.6"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T18:44:53.438037Z"},"published":"2026-08-15","updated":"2026-10-16","sourceUpdated":"2026-10-16T18:45:04.616Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-72243","references":[{"url":"https://git.kernel.org/stable/c/11406d0d7e11b4e525bb2ace2c70107031d058da"},{"url":"https://git.kernel.org/stable/c/e507633bf76bccf1a6af27771fb0d6e2862b7eac"},{"url":"https://git.kernel.org/stable/c/d028bc080a0dcd6a7f8e1ae1bd32dda696505ba3"},{"url":"https://git.kernel.org/stable/c/fc633a598206d4f23af782db7c0b5f3a82751d2c"},{"url":"https://git.kernel.org/stable/c/646ebbc5f2ff9147d084e1213143f091026a611c"},{"url":"https://git.kernel.org/stable/c/44c74d27d1b9aaa99fa8a83640c1223575262b80"}],"tags":["cve.org"],"epss":0.00166,"epssPercentile":0.05427,"ingestedAt":"2026-10-16T19:46:24.420Z","slug":"CVE-2026-72243","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nselinux: check connect-related permissions on TCP Fast Open\n\nSimilar to Landlock, SELinux was not updated when TCP Fast Open\nsupport was introduced to ensure connect-related permissions are\nchecked when using TCP Fast Open. Update its socket_sendmsg() hook to\ncall selinux_socket_connect() when MSG_FASTOPEN is passed.\n\n## Affected\n\n- `Linux >= cf60af03ca4e71134206809ea892e49b92a88896 < 11406d0d7e11b4e525bb2ace2c70107031d058da`\n- `Linux >= cf60af03ca4e71134206809ea892e49b92a88896 < e507633bf76bccf1a6af27771fb0d6e2862b7eac`\n- `Linux >= cf60af03ca4e71134206809ea892e49b92a88896 < d028bc080a0dcd6a7f8e1ae1bd32dda696505ba3`\n- `Linux >= cf60af03ca4e71134206809ea892e49b92a88896 < fc633a598206d4f23af782db7c0b5f3a82751d2c`\n- `Linux >= cf60af03ca4e71134206809ea892e49b92a88896 < 646ebbc5f2ff9147d084e1213143f091026a611c`\n- `Linux >= cf60af03ca4e71134206809ea892e49b92a88896 < 44c74d27d1b9aaa99fa8a83640c1223575262b80`\n- `Linux 3.6`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":46,"depthScoreParts":{"impact":46.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}