{"id":"CVE-2025-40216","summary":"io_uring/rsrc: don't rely on user vaddr alignment","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/rsrc: don't rely on user vaddr alignment\n\nThere is no guaranteed alignment for user pointers, however the\ncalculation of an offset of the first page into a folio after coalescing\nuses some weird bit mask logic, get rid of it.","modified":"2026-04-02T12:48:19.665713Z","published":"2025-12-04T14:14:14.690Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/40xxx/CVE-2025-40216.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/3a3c6d61577dbb23c09df3e21f6f9eda1ecd634b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/50998b0ae7d9d552e96d8b7239981cf05f65eff5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f16769241594be59387b56ab525e327f54377e60"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/40xxx/CVE-2025-40216.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-40216"},{"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":"a8edbb424b1391b077407c75d8f5d2ede77aa70d"},{"fixed":"50998b0ae7d9d552e96d8b7239981cf05f65eff5"},{"fixed":"f16769241594be59387b56ab525e327f54377e60"},{"fixed":"3a3c6d61577dbb23c09df3e21f6f9eda1ecd634b"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-40216.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.12.0"},{"fixed":"6.12.36"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.15.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-40216.json"}}],"schema_version":"1.7.5"}