Bug 2516684 (CVE-2026-72243) - CVE-2026-72243 kernel: selinux: check connect-related permissions on TCP Fast Open
Summary: CVE-2026-72243 kernel: selinux: check connect-related permissions on TCP Fast...
Keywords:
Status: NEW
Alias: CVE-2026-72243
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-15 06:25 UTC by OSIDB Bzimport
Modified: 2026-08-18 17:13 UTC (History)
2 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-08-15 06:25:42 UTC 
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.
Comment 1 Keith Grant 2026-08-18 17:10:42 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081551-CVE-2026-72243-04e7@gregkh/T
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