{"cve":"CVE-2025-21724","nvd":{"published":"2025-02-27T02:15:16.113","modified":"2026-10-15T02:17:30.170","status":"Modified","description":"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->mapped.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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8},"cwes":["CWE-787"],"references":["https://git.kernel.org/stable/c/38ac76fc06bc6826a3e4b12a98efbe98432380a9","https://git.kernel.org/stable/c/44d9c94b7a3f29a3e07c4753603a35e9b28842a3","https://git.kernel.org/stable/c/b1f8453b8ff1ab79a03820ef608256c499769cb6","https://git.kernel.org/stable/c/d5d33f01b86af44b23eea61ee309e4ef22c0cdfe","https://git.kernel.org/stable/c/e24c1551059268b37f6f40639883eafb281b8b9c"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:59:48.811064707+00:00"},"epss":{"cve":"CVE-2025-21724","score":0.00191,"percentile":0.08713,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}