{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-38579","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-04-16T04:51:24.026Z","datePublished":"2025-08-19T17:03:02.308Z","dateUpdated":"2026-05-11T21:30:53.506Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T21:30:53.506Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix KMSAN uninit-value in extent_info usage\n\nKMSAN reported a use of uninitialized value in `__is_extent_mergeable()`\n and `__is_back_mergeable()` via the read extent tree path.\n\nThe root cause is that `get_read_extent_info()` only initializes three\nfields (`fofs`, `blk`, `len`) of `struct extent_info`, leaving the\nremaining fields uninitialized. This leads to undefined behavior\nwhen those fields are accessed later, especially during\nextent merging.\n\nFix it by zero-initializing the `extent_info` struct before population."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/f2fs/extent_cache.c"],"versions":[{"version":"94afd6d6e5253179c9b891d02081cc8355a11768","lessThan":"08e8ab00a6d20d5544c932ee85a297d833895141","status":"affected","versionType":"git"},{"version":"94afd6d6e5253179c9b891d02081cc8355a11768","lessThan":"e68b751ec2b15d866967812c57cfdfc1eba6a269","status":"affected","versionType":"git"},{"version":"94afd6d6e5253179c9b891d02081cc8355a11768","lessThan":"dabfa3952c8e6bfe6414dbf32e8b6c5f349dc898","status":"affected","versionType":"git"},{"version":"94afd6d6e5253179c9b891d02081cc8355a11768","lessThan":"44a79437309e0ee2276ac17aaedc71253af253a8","status":"affected","versionType":"git"},{"version":"94afd6d6e5253179c9b891d02081cc8355a11768","lessThan":"cc1615d5aba4f396cf412579928539a2b124c8a0","status":"affected","versionType":"git"},{"version":"94afd6d6e5253179c9b891d02081cc8355a11768","lessThan":"01b6f5955e0008af6bc3a181310d2744bb349800","status":"affected","versionType":"git"},{"version":"94afd6d6e5253179c9b891d02081cc8355a11768","lessThan":"154467f4ad033473e5c903a03e7b9bca7df9a0fa","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/f2fs/extent_cache.c"],"versions":[{"version":"5.15","status":"affected"},{"version":"0","lessThan":"5.15","status":"unaffected","versionType":"semver"},{"version":"5.15.190","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.148","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.102","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.42","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.15.10","lessThanOrEqual":"6.15.*","status":"unaffected","versionType":"semver"},{"version":"6.16.1","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":"5.15","versionEndExcluding":"5.15.190"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.1.148"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.6.102"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.12.42"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.15.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.16.1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.17"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/08e8ab00a6d20d5544c932ee85a297d833895141"},{"url":"https://git.kernel.org/stable/c/e68b751ec2b15d866967812c57cfdfc1eba6a269"},{"url":"https://git.kernel.org/stable/c/dabfa3952c8e6bfe6414dbf32e8b6c5f349dc898"},{"url":"https://git.kernel.org/stable/c/44a79437309e0ee2276ac17aaedc71253af253a8"},{"url":"https://git.kernel.org/stable/c/cc1615d5aba4f396cf412579928539a2b124c8a0"},{"url":"https://git.kernel.org/stable/c/01b6f5955e0008af6bc3a181310d2744bb349800"},{"url":"https://git.kernel.org/stable/c/154467f4ad033473e5c903a03e7b9bca7df9a0fa"}],"title":"f2fs: fix KMSAN uninit-value in extent_info usage","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2025-11-03T17:40:08.639Z"}}]}}