CVE-2026-72243

HIGH 8.4

selinux: check connect-related permissions on TCP Fast Open

CVSS Score

8.4

EPSS Score

0.2%

EPSS Percentile

6th

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.

Vendor	linux
Product	linux
Ecosystems	Linux Kernel
Industries	Technology
Published	Aug 15, 2026
Last Updated	Aug 18, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

Linux / Linux

cf60af03ca4e71134206809ea892e49b92a88896 < 11406d0d7e11b4e525bb2ace2c70107031d058da cf60af03ca4e71134206809ea892e49b92a88896 < e507633bf76bccf1a6af27771fb0d6e2862b7eac cf60af03ca4e71134206809ea892e49b92a88896 < d028bc080a0dcd6a7f8e1ae1bd32dda696505ba3 cf60af03ca4e71134206809ea892e49b92a88896 < fc633a598206d4f23af782db7c0b5f3a82751d2c cf60af03ca4e71134206809ea892e49b92a88896 < 646ebbc5f2ff9147d084e1213143f091026a611c cf60af03ca4e71134206809ea892e49b92a88896 < 44c74d27d1b9aaa99fa8a83640c1223575262b80

Linux / Linux

3.6

References

NVD ↗ CVE.org ↗ EPSS Data ↗

git.kernel.org: https://git.kernel.org/stable/c/11406d0d7e11b4e525bb2ace2c70107031d058da git.kernel.org: https://git.kernel.org/stable/c/e507633bf76bccf1a6af27771fb0d6e2862b7eac git.kernel.org: https://git.kernel.org/stable/c/d028bc080a0dcd6a7f8e1ae1bd32dda696505ba3 git.kernel.org: https://git.kernel.org/stable/c/fc633a598206d4f23af782db7c0b5f3a82751d2c git.kernel.org: https://git.kernel.org/stable/c/646ebbc5f2ff9147d084e1213143f091026a611c git.kernel.org: https://git.kernel.org/stable/c/44c74d27d1b9aaa99fa8a83640c1223575262b80