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
high
high
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: 2026-09-24 03:01 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:68570 0 None None None 2026-09-17 12:16:33 UTC
Red Hat Product Errata RHSA-2026:71233 0 None None None 2026-09-24 03:01:05 UTC

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
Comment 7 Jon Orris 2026-09-17 12:16:32 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:68570 https://access.redhat.com/errata/RHSA-2026:68570
Comment 8 Jon Orris 2026-09-24 03:01:04 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:71233 https://access.redhat.com/errata/RHSA-2026:71233
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