{"api_version":"1","generated_at":"2026-10-03T03:19:12+00:00","cve":"CVE-2026-90418","urls":{"html":"https://cve.report/CVE-2026-90418","api":"https://cve.report/api/cve/CVE-2026-90418.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-90418","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-90418"},"summary":{"title":"nilfs2: fix BUG in nilfs_copy_dirty_pages() on dirty state mismatch","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: fix BUG in nilfs_copy_dirty_pages() on dirty state mismatch\n\nSyzbot reported a kernel BUG triggered within nilfs_copy_dirty_pages(),\nwhich copies dirty DAT file folios/pages to its shadow page cache.  The\nBUG occurs when a retrieved dirty folio/page unexpectedly loses its\n'dirty' status.\n\nThis issue arises because, since the commit referenced below, the 'dirty'\nflag of a folio/page can be cleared asynchronously after the filesystem\ndetects metadata corruption and transitions to read-only mode.\n\nResolve the issue by returning an -EROFS error if the filesystem has\ntransitioned to read-only mode.  Also change the behavior to issue a\nkernel warning only once instead of triggering a kernel BUG when this\nunexpected 'dirty' state is detected while the filesystem is not in\nread-only mode.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-17 17:17:46","updated_at":"2026-09-17 17:17:46"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/66f4ad3ce158902e5f98afea93189972ed8750c2","name":"https://git.kernel.org/stable/c/66f4ad3ce158902e5f98afea93189972ed8750c2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3904fb0ee741ebbbc27ec8f50a9bb6cd31e8af05","name":"https://git.kernel.org/stable/c/3904fb0ee741ebbbc27ec8f50a9bb6cd31e8af05","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f181155baf0c93a74ebe804c6cecbe970e78ee9e","name":"https://git.kernel.org/stable/c/f181155baf0c93a74ebe804c6cecbe970e78ee9e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5166a21b12f549774f2983fa86d2526ea9e66ace","name":"https://git.kernel.org/stable/c/5166a21b12f549774f2983fa86d2526ea9e66ace","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4e1f21e7540b25d83f86b50780836ed7d2afcc93","name":"https://git.kernel.org/stable/c/4e1f21e7540b25d83f86b50780836ed7d2afcc93","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90418","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90418","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8c26c4e2694a163d525976e804d81cd955bbb40c 5166a21b12f549774f2983fa86d2526ea9e66ace git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8c26c4e2694a163d525976e804d81cd955bbb40c 4e1f21e7540b25d83f86b50780836ed7d2afcc93 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8c26c4e2694a163d525976e804d81cd955bbb40c 3904fb0ee741ebbbc27ec8f50a9bb6cd31e8af05 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8c26c4e2694a163d525976e804d81cd955bbb40c f181155baf0c93a74ebe804c6cecbe970e78ee9e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8c26c4e2694a163d525976e804d81cd955bbb40c 66f4ad3ce158902e5f98afea93189972ed8750c2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3.10","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 3.10 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.157 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.110 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.52 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.6 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"90418","cve":"CVE-2026-90418","epss":"0.001680000","percentile":"0.064930000","score_date":"2026-09-18","updated_at":"2026-09-19 00:06:17"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/nilfs2/page.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"5166a21b12f549774f2983fa86d2526ea9e66ace","status":"affected","version":"8c26c4e2694a163d525976e804d81cd955bbb40c","versionType":"git"},{"lessThan":"4e1f21e7540b25d83f86b50780836ed7d2afcc93","status":"affected","version":"8c26c4e2694a163d525976e804d81cd955bbb40c","versionType":"git"},{"lessThan":"3904fb0ee741ebbbc27ec8f50a9bb6cd31e8af05","status":"affected","version":"8c26c4e2694a163d525976e804d81cd955bbb40c","versionType":"git"},{"lessThan":"f181155baf0c93a74ebe804c6cecbe970e78ee9e","status":"affected","version":"8c26c4e2694a163d525976e804d81cd955bbb40c","versionType":"git"},{"lessThan":"66f4ad3ce158902e5f98afea93189972ed8750c2","status":"affected","version":"8c26c4e2694a163d525976e804d81cd955bbb40c","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["fs/nilfs2/page.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.10"},{"lessThan":"3.10","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.157","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.110","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.52","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.157","versionStartIncluding":"3.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.110","versionStartIncluding":"3.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.52","versionStartIncluding":"3.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.6","versionStartIncluding":"3.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"3.10","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: fix BUG in nilfs_copy_dirty_pages() on dirty state mismatch\n\nSyzbot reported a kernel BUG triggered within nilfs_copy_dirty_pages(),\nwhich copies dirty DAT file folios/pages to its shadow page cache.  The\nBUG occurs when a retrieved dirty folio/page unexpectedly loses its\n'dirty' status.\n\nThis issue arises because, since the commit referenced below, the 'dirty'\nflag of a folio/page can be cleared asynchronously after the filesystem\ndetects metadata corruption and transitions to read-only mode.\n\nResolve the issue by returning an -EROFS error if the filesystem has\ntransitioned to read-only mode.  Also change the behavior to issue a\nkernel warning only once instead of triggering a kernel BUG when this\nunexpected 'dirty' state is detected while the filesystem is not in\nread-only mode."}],"providerMetadata":{"dateUpdated":"2026-09-17T16:09:43.223Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/5166a21b12f549774f2983fa86d2526ea9e66ace"},{"url":"https://git.kernel.org/stable/c/4e1f21e7540b25d83f86b50780836ed7d2afcc93"},{"url":"https://git.kernel.org/stable/c/3904fb0ee741ebbbc27ec8f50a9bb6cd31e8af05"},{"url":"https://git.kernel.org/stable/c/f181155baf0c93a74ebe804c6cecbe970e78ee9e"},{"url":"https://git.kernel.org/stable/c/66f4ad3ce158902e5f98afea93189972ed8750c2"}],"title":"nilfs2: fix BUG in nilfs_copy_dirty_pages() on dirty state mismatch","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-90418","datePublished":"2026-09-17T16:09:43.223Z","dateReserved":"2026-09-11T19:38:34.813Z","dateUpdated":"2026-09-17T16:09:43.223Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-17 17:17:46","lastModifiedDate":"2026-09-17 17:17:46","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"90418","Ordinal":"1","Title":"nilfs2: fix BUG in nilfs_copy_dirty_pages() on dirty state misma","CVE":"CVE-2026-90418","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"90418","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: fix BUG in nilfs_copy_dirty_pages() on dirty state mismatch\n\nSyzbot reported a kernel BUG triggered within nilfs_copy_dirty_pages(),\nwhich copies dirty DAT file folios/pages to its shadow page cache.  The\nBUG occurs when a retrieved dirty folio/page unexpectedly loses its\n'dirty' status.\n\nThis issue arises because, since the commit referenced below, the 'dirty'\nflag of a folio/page can be cleared asynchronously after the filesystem\ndetects metadata corruption and transitions to read-only mode.\n\nResolve the issue by returning an -EROFS error if the filesystem has\ntransitioned to read-only mode.  Also change the behavior to issue a\nkernel warning only once instead of triggering a kernel BUG when this\nunexpected 'dirty' state is detected while the filesystem is not in\nread-only mode.","Type":"Description","Title":"nilfs2: fix BUG in nilfs_copy_dirty_pages() on dirty state misma"}]}}}