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CVE-2026-72243

HIGHCVSS 8.4/10EPSS 0.16%

Last modified

CVE-2026-72243 is a high-severity vulnerability rated 8.4/10 on the CVSS scale. 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.. EPSS estimates a 0.16% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
8.4/10

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

EPSS Probability
0.16%

5.8th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= cf60af03ca4e71134206809ea892e49b92a88896, < 11406d0d7e11b4e525bb2ace2c70107031d058da; >= cf60af03ca4e71134206809ea892e49b92a88896, < e507633bf76bccf1a6af27771fb0d6e2862b7eac; >= cf60af03ca4e71134206809ea892e49b92a88896, < d028bc080a0dcd6a7f8e1ae1bd32dda696505ba3; >= cf60af03ca4e71134206809ea892e49b92a88896, < fc633a598206d4f23af782db7c0b5f3a82751d2c; >= cf60af03ca4e71134206809ea892e49b92a88896, < 646ebbc5f2ff9147d084e1213143f091026a611c; >= cf60af03ca4e71134206809ea892e49b92a88896, < 44c74d27d1b9aaa99fa8a83640c1223575262b80
LinuxLinux3.6

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-72243?
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.
How severe is CVE-2026-72243?
CVE-2026-72243 has a CVSS score of 8.4/10 (HIGH severity). The EPSS model estimates a 0.16% probability of exploitation in the next 30 days.
How do I fix CVE-2026-72243?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST