{"id":"CVE-2026-72243","aliases":[],"url":"https://o3.security/vulnerability/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.","published":"2026-08-15T05:54:31.117Z","modified":"2026-08-18T03:56:39.484914851Z","cvss":{"score":8.4,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"6.1.178"}],"fix":null,"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"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-18T03:56:39.484914851Z"}}