{"id":"CVE-2026-72350","summary":"netfilter: xt_u32: reject invalid shift counts","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: xt_u32: reject invalid shift counts\n\nu32_match_it() executes rule-supplied shift operands on a 32-bit\nvalue. A malformed u32 rule can provide a shift count of 32 or more,\ntriggering an undefined shift out-of-bounds during packet evaluation.\n\nValidate XT_U32_LEFTSH and XT_U32_RIGHTSH operands in\nu32_mt_checkentry() and reject malformed rules before they reach the\npacket path.","modified":"2026-08-18T03:56:41.890077776Z","published":"2026-08-15T05:55:53.532Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72350.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/00d034fe8230dfc5832fe011ff2d81c1a2cc7a29"},{"type":"WEB","url":"https://git.kernel.org/stable/c/0a8b7a6d763775709c601f584e709ae48bcc000a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/64cdf7d30ac18e43df6c48004435febb965809a8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/728f479dc0447ae7eaef87926ff49142e415a811"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a597a722fb71a534138c20359b655726622b5f17"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b33b44250d57ab0e5a1e2571b5285fb0d0a7f382"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ca7c92d9701249e6daf132087756a88cbf2bb2a3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cce42014415cecd98aa49b3950e7b02ee7c81268"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72350.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72350"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"1b50b8a371e90a5e110f466e4ac02cf6b5f681de"},{"fixed":"ca7c92d9701249e6daf132087756a88cbf2bb2a3"},{"fixed":"b33b44250d57ab0e5a1e2571b5285fb0d0a7f382"},{"fixed":"728f479dc0447ae7eaef87926ff49142e415a811"},{"fixed":"0a8b7a6d763775709c601f584e709ae48bcc000a"},{"fixed":"cce42014415cecd98aa49b3950e7b02ee7c81268"},{"fixed":"a597a722fb71a534138c20359b655726622b5f17"},{"fixed":"00d034fe8230dfc5832fe011ff2d81c1a2cc7a29"},{"fixed":"64cdf7d30ac18e43df6c48004435febb965809a8"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72350.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.6.23"},{"fixed":"5.10.261"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.212"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.178"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.145"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.97"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.40"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72350.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}