CVE-2026-72350
In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_u32: reject invalid shift counts u32_match_it() executes rule-supplied shift operands on a 32-bit value. A malformed u32 rule can provide a shift count of 32 or more, triggering an undefined shift out-of-bounds during packet evaluation. Validate XT_U32_LEFTSH and XT_U32_RIGHTSH operands in u32_mt_checkentry() and reject malformed rules before they reach the packet path.
Affected versions
Linux kernel versions
2.6.23
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-rc3
and their respective stable series.
References
8 totalFrequently asked questions
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What is CVE-2026-72350?
CVE-2026-72350 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 2.6.23 onward and has been patched in 5.10.261, 5.15.212, 6.1.178 and others. CVE-2026-72350 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-2026-72350?
Yes. CVE-2026-72350 has been patched. Fixed versions include 5.10.261, 5.15.212, 6.1.178 and others. If you are running Linux kernel 2.6.23 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-72350 actively exploited?
No. CVE-2026-72350 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.