CVE-2026-72350
netfilter: xt_u32: reject invalid shift counts
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Aug 15, 2026 |
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Affected Versions
Linux / Linux
1b50b8a371e90a5e110f466e4ac02cf6b5f681de < ca7c92d9701249e6daf132087756a88cbf2bb2a3 1b50b8a371e90a5e110f466e4ac02cf6b5f681de < b33b44250d57ab0e5a1e2571b5285fb0d0a7f382 1b50b8a371e90a5e110f466e4ac02cf6b5f681de < 728f479dc0447ae7eaef87926ff49142e415a811 1b50b8a371e90a5e110f466e4ac02cf6b5f681de < 0a8b7a6d763775709c601f584e709ae48bcc000a 1b50b8a371e90a5e110f466e4ac02cf6b5f681de < cce42014415cecd98aa49b3950e7b02ee7c81268 1b50b8a371e90a5e110f466e4ac02cf6b5f681de < a597a722fb71a534138c20359b655726622b5f17 1b50b8a371e90a5e110f466e4ac02cf6b5f681de < 00d034fe8230dfc5832fe011ff2d81c1a2cc7a29 1b50b8a371e90a5e110f466e4ac02cf6b5f681de < 64cdf7d30ac18e43df6c48004435febb965809a8
Linux / Linux
2.6.23
References
git.kernel.org: https://git.kernel.org/stable/c/ca7c92d9701249e6daf132087756a88cbf2bb2a3 git.kernel.org: https://git.kernel.org/stable/c/b33b44250d57ab0e5a1e2571b5285fb0d0a7f382 git.kernel.org: https://git.kernel.org/stable/c/728f479dc0447ae7eaef87926ff49142e415a811 git.kernel.org: https://git.kernel.org/stable/c/0a8b7a6d763775709c601f584e709ae48bcc000a git.kernel.org: https://git.kernel.org/stable/c/cce42014415cecd98aa49b3950e7b02ee7c81268 git.kernel.org: https://git.kernel.org/stable/c/a597a722fb71a534138c20359b655726622b5f17 git.kernel.org: https://git.kernel.org/stable/c/00d034fe8230dfc5832fe011ff2d81c1a2cc7a29 git.kernel.org: https://git.kernel.org/stable/c/64cdf7d30ac18e43df6c48004435febb965809a8