{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-38686","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-04-16T04:51:24.032Z","datePublished":"2025-09-04T15:32:40.771Z","dateUpdated":"2026-05-11T21:33:01.310Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T21:33:01.310Z"},"descriptions":[{"lang":"en","value":"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]"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["mm/userfaultfd.c"],"versions":[{"version":"adef440691bab824e39c1b17382322d195e1fab0","lessThan":"bb81c18dbd42650c844e160cafa7cbb20243a96a","status":"affected","versionType":"git"},{"version":"adef440691bab824e39c1b17382322d195e1fab0","lessThan":"1202abad7a7ccd28c426d2844771a387b07629a4","status":"affected","versionType":"git"},{"version":"adef440691bab824e39c1b17382322d195e1fab0","lessThan":"7f1101a0a181243ad587ececdffc4845f035549f","status":"affected","versionType":"git"},{"version":"adef440691bab824e39c1b17382322d195e1fab0","lessThan":"aba6faec0103ed8f169be8dce2ead41fcb689446","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["mm/userfaultfd.c"],"versions":[{"version":"6.8","status":"affected"},{"version":"0","lessThan":"6.8","status":"unaffected","versionType":"semver"},{"version":"6.12.43","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.15.11","lessThanOrEqual":"6.15.*","status":"unaffected","versionType":"semver"},{"version":"6.16.2","lessThanOrEqual":"6.16.*","status":"unaffected","versionType":"semver"},{"version":"6.17","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"6.12.43"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"6.15.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"6.16.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"6.17"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/bb81c18dbd42650c844e160cafa7cbb20243a96a"},{"url":"https://git.kernel.org/stable/c/1202abad7a7ccd28c426d2844771a387b07629a4"},{"url":"https://git.kernel.org/stable/c/7f1101a0a181243ad587ececdffc4845f035549f"},{"url":"https://git.kernel.org/stable/c/aba6faec0103ed8f169be8dce2ead41fcb689446"}],"title":"userfaultfd: fix a crash in UFFDIO_MOVE when PMD is a migration entry","x_generator":{"engine":"bippy-1.2.0"}}}}