{"cve":"CVE-2025-38686","nvd":{"published":"2025-09-04T16:15:36.557","modified":"2026-10-19T21:10:00.160","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nuserfaultfd: fix a crash in UFFDIO_MOVE when PMD is a migration entry\n\nWhen UFFDIO_MOVE encounters a migration PMD entry, it proceeds with\nobtaining a folio and accessing it even though the entry is swp_entry_t. \nAdd the missing check and let split_huge_pmd() handle migration entries. \nWhile at it also remove unnecessary folio check.\n\n[surenb@google.com: remove extra folio check, per David]","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":[],"references":["https://git.kernel.org/stable/c/1202abad7a7ccd28c426d2844771a387b07629a4","https://git.kernel.org/stable/c/7f1101a0a181243ad587ececdffc4845f035549f","https://git.kernel.org/stable/c/aba6faec0103ed8f169be8dce2ead41fcb689446","https://git.kernel.org/stable/c/bb81c18dbd42650c844e160cafa7cbb20243a96a"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-21T03:43:09.190223697+00:00"},"epss":{"cve":"CVE-2025-38686","score":0.00159,"percentile":0.05006,"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."]}