{"id":"CVE-2026-72181","summary":"mips: sched: Fix CPUMASK_OFFSTACK memory corruption","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nmips: sched: Fix CPUMASK_OFFSTACK memory corruption\n\nThis patch addresses a critical memory management flaw. When\nCONFIG_CPUMASK_OFFSTACK is enabled, cpumask_var_t is a pointer.\nConsequently, sizeof(new_mask) evaluates to the pointer size, causing\ncopy_from_user() to clobber the mask pointer. Furthermore, the old\nlogic performed copy_from_user() before allocating the mask.\n\nFix this by allocating new_mask first. To handle variable-sized user\nmasks correctly, use cpumask_size() to truncate overly large user masks\nor pad undersized masks with zeros before copying the data directly into\nthe allocated buffer.","modified":"2026-08-21T03:30:21.657392361Z","published":"2026-08-15T05:53:44.453Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72181.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/15ba8053fe4162c933855f1676fb321cdb6251c7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1caee6e084a96ada94658f261ced377d85af3f03"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2f7730c03a9deea3ba7a1c980070d363b4ea2046"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3446ffb5d03c36f9ce88ede7ca5be319a2968d96"},{"type":"WEB","url":"https://git.kernel.org/stable/c/87a56c1e8e36d06ebe8640432f911538ded7827d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/98e37db4a34d3af3fb2f4648295c25b5e40b20e3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a1dd41d00c57efb1fbc6f361c5f48c9d00cca51c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d20ee42f8226607b5693b2bc2f115ca2d270221a"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72181.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72181"},{"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":"295cbf6d63165fe4253cf1d9ceadcda47a318b48"},{"fixed":"2f7730c03a9deea3ba7a1c980070d363b4ea2046"},{"fixed":"d20ee42f8226607b5693b2bc2f115ca2d270221a"},{"fixed":"15ba8053fe4162c933855f1676fb321cdb6251c7"},{"fixed":"3446ffb5d03c36f9ce88ede7ca5be319a2968d96"},{"fixed":"87a56c1e8e36d06ebe8640432f911538ded7827d"},{"fixed":"1caee6e084a96ada94658f261ced377d85af3f03"},{"fixed":"a1dd41d00c57efb1fbc6f361c5f48c9d00cca51c"},{"fixed":"98e37db4a34d3af3fb2f4648295c25b5e40b20e3"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72181.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.6.23"},{"fixed":"5.10.265"}]},{"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-2026-72181.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"}]}