CVE-2026-72350

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinux1b50b8a371e90a5e110f466e4ac02cf6b5f681de < ca7c92d9701249e6daf132087756a88cbf2bb2a3affected
LinuxLinux1b50b8a371e90a5e110f466e4ac02cf6b5f681de < b33b44250d57ab0e5a1e2571b5285fb0d0a7f382affected
LinuxLinux1b50b8a371e90a5e110f466e4ac02cf6b5f681de < 728f479dc0447ae7eaef87926ff49142e415a811affected
LinuxLinux1b50b8a371e90a5e110f466e4ac02cf6b5f681de < 0a8b7a6d763775709c601f584e709ae48bcc000aaffected
LinuxLinux1b50b8a371e90a5e110f466e4ac02cf6b5f681de < cce42014415cecd98aa49b3950e7b02ee7c81268affected
LinuxLinux1b50b8a371e90a5e110f466e4ac02cf6b5f681de < a597a722fb71a534138c20359b655726622b5f17affected
LinuxLinux1b50b8a371e90a5e110f466e4ac02cf6b5f681de < 00d034fe8230dfc5832fe011ff2d81c1a2cc7a29affected
LinuxLinux1b50b8a371e90a5e110f466e4ac02cf6b5f681de < 64cdf7d30ac18e43df6c48004435febb965809a8affected
LinuxLinux2.6.23affected
LinuxLinux0 < 2.6.23unaffected
LinuxLinux5.10.261 <= 5.10.*unaffected
LinuxLinux5.15.212 <= 5.15.*unaffected
LinuxLinux6.1.178 <= 6.1.*unaffected
LinuxLinux6.6.145 <= 6.6.*unaffected
LinuxLinux6.12.97 <= 6.12.*unaffected
LinuxLinux6.18.40 <= 6.18.*unaffected
LinuxLinux7.1.5 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References