{"id":"CVE-2026-72243","summary":"selinux: check connect-related permissions on TCP Fast Open","details":"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-related permissions are\nchecked when using TCP Fast Open. Update its socket_sendmsg() hook to\ncall selinux_socket_connect() when MSG_FASTOPEN is passed.","modified":"2026-08-20T03:30:58.339245687Z","published":"2026-08-15T05:54:31.117Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72243.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/11406d0d7e11b4e525bb2ace2c70107031d058da"},{"type":"WEB","url":"https://git.kernel.org/stable/c/44c74d27d1b9aaa99fa8a83640c1223575262b80"},{"type":"WEB","url":"https://git.kernel.org/stable/c/646ebbc5f2ff9147d084e1213143f091026a611c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d028bc080a0dcd6a7f8e1ae1bd32dda696505ba3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e507633bf76bccf1a6af27771fb0d6e2862b7eac"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fc633a598206d4f23af782db7c0b5f3a82751d2c"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72243.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72243"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"cf60af03ca4e71134206809ea892e49b92a88896"},{"fixed":"11406d0d7e11b4e525bb2ace2c70107031d058da"},{"fixed":"e507633bf76bccf1a6af27771fb0d6e2862b7eac"},{"fixed":"d028bc080a0dcd6a7f8e1ae1bd32dda696505ba3"},{"fixed":"fc633a598206d4f23af782db7c0b5f3a82751d2c"},{"fixed":"646ebbc5f2ff9147d084e1213143f091026a611c"},{"fixed":"44c74d27d1b9aaa99fa8a83640c1223575262b80"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-72243.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.6.0"},{"fixed":"6.1.178"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.145"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.97"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.40"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-72243.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N"}]}