{"id":"CVE-2025-71295","state":"PUBLISHED","title":"fs/buffer: add alert in try_to_free_buffers() for folios without buffers","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs/buffer: add alert in try_to_free_buffers() for folios without buffers\n\ntry_to_free_buffers() can be called on folios with no buffers attached\nwhen filemap_release_folio() is invoked on a folio belonging to a mapping\nwith AS_RELEASE_ALWAYS set but no release_folio operation defined.\n\nIn such cases, folio_needs_release() returns true because of the\nAS_RELEASE_ALWAYS flag, but the folio has no private buffer data. This\ncauses try_to_free_buffers() to call drop_buffers() on a folio with no\nbuffers, leading to a null pointer dereference.\n\nAdding a check in try_to_free_buffers() to return early if the folio has no\nbuffers attached, with WARN_ON_ONCE() to alert about the misconfiguration.\nThis provides defensive hardening.","publishedAt":"2026-05-06T11:32:25.917Z","updatedAt":"2026-05-23T16:03:35.695Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"d0eafc763135508be118dac208887a26c0adb74d","status":"affected","lessThan":"1b111a69a6e33a922622bf9870e4e63fb2b649c8","versionType":"git"},{"version":"b4fa966f03b7401ceacd4ffd7227197afb2b8376","status":"affected","lessThan":"c1b6227555c52781178132b7a06466711855795c","versionType":"git"},{"version":"b4fa966f03b7401ceacd4ffd7227197afb2b8376","status":"affected","lessThan":"727e5140e0cf83b4ce6a11b89bb73bff5d96f8f3","versionType":"git"},{"version":"b4fa966f03b7401ceacd4ffd7227197afb2b8376","status":"affected","lessThan":"42c32d7571ccd8ef32351cac506f00b0fae99fd2","versionType":"git"},{"version":"b4fa966f03b7401ceacd4ffd7227197afb2b8376","status":"affected","lessThan":"c6246ca15999053d2632fbcc7b86e6eef7f077cb","versionType":"git"},{"version":"b4fa966f03b7401ceacd4ffd7227197afb2b8376","status":"affected","lessThan":"b68f91ef3b3fe82ad78c417de71b675699a8467c","versionType":"git"},{"version":"6.1.72","status":"affected","lessThan":"6.1.165","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/buffer.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.6","versionType":"semver"},{"version":"6.1.165","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.128","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.75","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.16","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.6","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/buffer.c"]}],"references":["https://git.kernel.org/stable/c/1b111a69a6e33a922622bf9870e4e63fb2b649c8","https://git.kernel.org/stable/c/c1b6227555c52781178132b7a06466711855795c","https://git.kernel.org/stable/c/727e5140e0cf83b4ce6a11b89bb73bff5d96f8f3","https://git.kernel.org/stable/c/42c32d7571ccd8ef32351cac506f00b0fae99fd2","https://git.kernel.org/stable/c/c6246ca15999053d2632fbcc7b86e6eef7f077cb","https://git.kernel.org/stable/c/b68f91ef3b3fe82ad78c417de71b675699a8467c"],"weaknesses":[],"ingestedAt":"2026-10-29T20:10:04.440Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/71xxx/CVE-2025-71295.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-71295","state":"PUBLISHED","datePublished":"2026-05-06T11:32:25.917Z","dateUpdated":"2026-05-23T16:03:35.695Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-06T11:31:45.510Z"},"containers":{"cna":{"title":"fs/buffer: add alert in try_to_free_buffers() for folios without buffers","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nfs/buffer: add alert in try_to_free_buffers() for folios without buffers\n\ntry_to_free_buffers() can be called on folios with no buffers attached\nwhen filemap_release_folio() is invoked on a folio belonging to a mapping\nwith AS_RELEASE_ALWAYS set but no release_folio operation defined.\n\nIn such cases, folio_needs_release() returns true because of the\nAS_RELEASE_ALWAYS flag, but the folio has no private buffer data. This\ncauses try_to_free_buffers() to call drop_buffers() on a folio with no\nbuffers, leading to a null pointer dereference.\n\nAdding a check in try_to_free_buffers() to return early if the folio has no\nbuffers attached, with WARN_ON_ONCE() to alert about the misconfiguration.\nThis provides defensive hardening."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"d0eafc763135508be118dac208887a26c0adb74d","status":"affected","lessThan":"1b111a69a6e33a922622bf9870e4e63fb2b649c8","versionType":"git"},{"version":"b4fa966f03b7401ceacd4ffd7227197afb2b8376","status":"affected","lessThan":"c1b6227555c52781178132b7a06466711855795c","versionType":"git"},{"version":"b4fa966f03b7401ceacd4ffd7227197afb2b8376","status":"affected","lessThan":"727e5140e0cf83b4ce6a11b89bb73bff5d96f8f3","versionType":"git"},{"version":"b4fa966f03b7401ceacd4ffd7227197afb2b8376","status":"affected","lessThan":"42c32d7571ccd8ef32351cac506f00b0fae99fd2","versionType":"git"},{"version":"b4fa966f03b7401ceacd4ffd7227197afb2b8376","status":"affected","lessThan":"c6246ca15999053d2632fbcc7b86e6eef7f077cb","versionType":"git"},{"version":"b4fa966f03b7401ceacd4ffd7227197afb2b8376","status":"affected","lessThan":"b68f91ef3b3fe82ad78c417de71b675699a8467c","versionType":"git"},{"version":"6.1.72","status":"affected","lessThan":"6.1.165","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/buffer.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.6","versionType":"semver"},{"version":"6.1.165","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.128","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.75","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.16","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.6","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/buffer.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/1b111a69a6e33a922622bf9870e4e63fb2b649c8"},{"url":"https://git.kernel.org/stable/c/c1b6227555c52781178132b7a06466711855795c"},{"url":"https://git.kernel.org/stable/c/727e5140e0cf83b4ce6a11b89bb73bff5d96f8f3"},{"url":"https://git.kernel.org/stable/c/42c32d7571ccd8ef32351cac506f00b0fae99fd2"},{"url":"https://git.kernel.org/stable/c/c6246ca15999053d2632fbcc7b86e6eef7f077cb"},{"url":"https://git.kernel.org/stable/c/b68f91ef3b3fe82ad78c417de71b675699a8467c"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-23T16:03:35.695Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.72","versionEndExcluding":"6.1.165"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.6.128"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.12.75"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.18.16"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.19.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"7.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}