{"cve":"CVE-2025-38688","nvd":{"published":"2025-09-04T16:15:36.863","modified":"2026-10-19T21:10:00.160","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\niommufd: Prevent ALIGN() overflow\n\nWhen allocating IOVA the candidate range gets aligned to the target\nalignment. If the range is close to ULONG_MAX then the ALIGN() can\nwrap resulting in a corrupted iova.\n\nOpen code the ALIGN() using get_add_overflow() to prevent this.\nThis simplifies the checks as we don't need to check for length earlier\neither.\n\nConsolidate the two copies of this code under a single helper.\n\nThis bug would allow userspace to create a mapping that overlaps with some\nother mapping or a reserved range.","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":[],"references":["https://git.kernel.org/stable/c/79fad1917802c28de51a479318a056a6fbe3e2f2","https://git.kernel.org/stable/c/b42497e3c0e74db061eafad41c0cd7243c46436b","https://git.kernel.org/stable/c/d19b817540c0abe84854a64ee9ee34cecc3bbeef","https://git.kernel.org/stable/c/e42a046bb41dcdde4f766a17d8211842007ed537","https://git.kernel.org/stable/c/ebb6021560b94649bec6b8faba6fe0dca2218e81"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-21T03:43:09.190223697+00:00"},"epss":{"cve":"CVE-2025-38688","score":0.00169,"percentile":0.06243,"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."]}