Description
In the Linux kernel, the following vulnerability has been resolved: selinux: check connect-related permissions on TCP Fast Open Similar to Landlock, SELinux was not updated when TCP Fast Open support was introduced to ensure connect-related permissions are checked when using TCP Fast Open. Update its socket_sendmsg() hook to call selinux_socket_connect() when MSG_FASTOPEN is passed.
References6
- git.kernel.org/stable/c/11406d0d7e11b4e525bb2ace2c70107031d058da
- git.kernel.org/stable/c/44c74d27d1b9aaa99fa8a83640c1223575262b80
- git.kernel.org/stable/c/646ebbc5f2ff9147d084e1213143f091026a611c
- git.kernel.org/stable/c/d028bc080a0dcd6a7f8e1ae1bd32dda696505ba3
- git.kernel.org/stable/c/e507633bf76bccf1a6af27771fb0d6e2862b7eac
- git.kernel.org/stable/c/fc633a598206d4f23af782db7c0b5f3a82751d2c
Metrics
- CVSS 3.1
-
8.4
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N - EPSS — exploit probability
- 0% percentile: 6 · as of 11 November 2026
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.