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CVE-2026-72243

selinux: check connect-related permissions on TCP Fast Open

HIGH

8.4

CVSS Score

Published: August 15, 2026 at 05:54 AM UTC

Updated: October 16, 2026 at 07:17 PM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

HIGH8.4

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

90%

3.6cf60af03ca4e71134206809ea892e49b92a88896

Vendor states this is fixed in 11406d0d7e11b4e525bb2ace2c70107031d058da (fixed)

Vendor states this is fixed in 44c74d27d1b9aaa99fa8a83640c1223575262b80 (fixed)

Vendor states this is fixed in 646ebbc5f2ff9147d084e1213143f091026a611c (fixed)

Vendor states this is fixed in d028bc080a0dcd6a7f8e1ae1bd32dda696505ba3 (fixed)

Vendor states this is fixed in e507633bf76bccf1a6af27771fb0d6e2862b7eac (fixed)

Vendor states this is fixed in fc633a598206d4f23af782db7c0b5f3a82751d2c (fixed)

Vendor states this is fixed in 3.6 (unaffected)

Vendor states this is fixed in 6.1.178 (unaffected)

Vendor states this is fixed in 6.12.97 (unaffected)

Vendor states this is fixed in 6.18.40 (unaffected)

Vendor states this is fixed in 6.6.145 (unaffected)

Vendor states this is fixed in 7.1.5 (unaffected)

Vendor states this is fixed in 7.2 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (6)

Source: cverecord

https://git.kernel.org/stable/c/11406d0d7e11b4e525bb2ace2c70107031d058da

Source: cverecord

https://git.kernel.org/stable/c/e507633bf76bccf1a6af27771fb0d6e2862b7eac

Source: cverecord

https://git.kernel.org/stable/c/d028bc080a0dcd6a7f8e1ae1bd32dda696505ba3

Source: cverecord

https://git.kernel.org/stable/c/fc633a598206d4f23af782db7c0b5f3a82751d2c

Source: cverecord

https://git.kernel.org/stable/c/646ebbc5f2ff9147d084e1213143f091026a611c

Source: cverecord

https://git.kernel.org/stable/c/44c74d27d1b9aaa99fa8a83640c1223575262b80

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.4HIGHLinux

Vector?

Quick Info

StatusRECEIVED

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