{"id":"CVE-2025-21724","summary":"iommufd/iova_bitmap: Fix shift-out-of-bounds in iova_bitmap_offset_to_index()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\niommufd/iova_bitmap: Fix shift-out-of-bounds in iova_bitmap_offset_to_index()\n\nResolve a UBSAN shift-out-of-bounds issue in iova_bitmap_offset_to_index()\nwhere shifting the constant \"1\" (of type int) by bitmap-\u003emapped.pgshift\n(an unsigned long value) could result in undefined behavior.\n\nThe constant \"1\" defaults to a 32-bit \"int\", and when \"pgshift\" exceeds\n31 (e.g., pgshift = 63) the shift operation overflows, as the result\ncannot be represented in a 32-bit type.\n\nTo resolve this, the constant is updated to \"1UL\", promoting it to an\nunsigned long type to match the operand's type.","modified":"2026-04-02T12:45:11.955921Z","published":"2025-02-27T02:07:31.630Z","related":["SUSE-SU-2025:01919-1","SUSE-SU-2025:0847-1","SUSE-SU-2025:0856-1","SUSE-SU-2025:0955-1","SUSE-SU-2025:20190-1","SUSE-SU-2025:20192-1","SUSE-SU-2025:20260-1","SUSE-SU-2025:20270-1","USN-7521-2"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21724.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/38ac76fc06bc6826a3e4b12a98efbe98432380a9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/44d9c94b7a3f29a3e07c4753603a35e9b28842a3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b1f8453b8ff1ab79a03820ef608256c499769cb6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d5d33f01b86af44b23eea61ee309e4ef22c0cdfe"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e24c1551059268b37f6f40639883eafb281b8b9c"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21724.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-21724"},{"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":"58ccf0190d19d9a8a41f8a02b9e06742b58df4a1"},{"fixed":"44d9c94b7a3f29a3e07c4753603a35e9b28842a3"},{"fixed":"38ac76fc06bc6826a3e4b12a98efbe98432380a9"},{"fixed":"d5d33f01b86af44b23eea61ee309e4ef22c0cdfe"},{"fixed":"b1f8453b8ff1ab79a03820ef608256c499769cb6"},{"fixed":"e24c1551059268b37f6f40639883eafb281b8b9c"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-21724.json"}}],"schema_version":"1.7.5"}