CVE-2026-72450
In the Linux kernel, the following vulnerability has been resolved: xfrm: validate selector family and prefixlen during match syzbot reported a shift-out-of-bounds in xfrm_selector_match() due to AF_UNSPEC selector with large prefixlen (e.g. 128) matched against IPv4 flow (when XFRM_STATE_AF_UNSPEC is set). Fix this by: - Rejecting mismatched families in xfrm_selector_match. - Returning false in addr4_match if prefixlen > 32. - Returning false in addr_match if prefixlen > 128 (prevents overflow).
Affected versions
Linux kernel versions
5.10.229,
5.15.170,
6.1.115,
6.6.59,
4.19.323,
5.4.285,
6.11.6,
6.12
and later are affected. Fixed in
5.10.261,
5.15.212,
6.1.178,
6.6.145,
6.12.97,
6.18.40,
7.1.5,
7.2-rc1
and their respective stable series.
References
8 totalFrequently asked questions
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What is CVE-2026-72450?
CVE-2026-72450 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.10.229 onward and has been patched in 5.10.261, 5.15.212, 6.1.178 and others. CVE-2026-72450 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-72450?
Yes. CVE-2026-72450 has been patched. Fixed versions include 5.10.261, 5.15.212, 6.1.178 and others. If you are running Linux kernel 5.10.229 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-72450 actively exploited?
No. CVE-2026-72450 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.