{"api_version":"1","generated_at":"2026-10-24T15:26:43+00:00","cve":"CVE-2026-90420","urls":{"html":"https://cve.report/CVE-2026-90420","api":"https://cve.report/api/cve/CVE-2026-90420.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-90420","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-90420"},"summary":{"title":"nilfs2: fix infinite loop in nilfs_clean_segments()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: fix infinite loop in nilfs_clean_segments()\n\nsyzbot reported a hung task in nilfs_transaction_begin(). This occurs\nbecause the cleaner ioctl falls into an infinite loop if\nnilfs_segctor_construct() repeatedly returns -EROFS (e.g. the device\nis remounted as read-only after an I/O error).\n\nCurrently in nilfs_clean_segments(), if err is non-zero, it logs the\nerror and sleeps but doesn't abort when it encounters a terminal error\nlike -EROFS. This causes the thread to loop forever.\n\nFix this by breaking out of the loop if nilfs_segctor_construct()\nreturns -EROFS. This matches the behaviour in\nnilfs_segctor_write_out(), which also handles -EROFS.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-17 17:17:46","updated_at":"2026-10-19 09:19:36"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/3bcdbdaac884a4baa59716cf9bd9470c75276e2d","name":"https://git.kernel.org/stable/c/3bcdbdaac884a4baa59716cf9bd9470c75276e2d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1fc6df85b4954b6fda9c351843aaca3c06f66d8d","name":"https://git.kernel.org/stable/c/1fc6df85b4954b6fda9c351843aaca3c06f66d8d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e3e9367dae1a6392cbb14ab0b2ab5edbf39735c3","name":"https://git.kernel.org/stable/c/e3e9367dae1a6392cbb14ab0b2ab5edbf39735c3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/8cea0bc78ac64cb88da49c07f80bf2cf9fb7aff8","name":"https://git.kernel.org/stable/c/8cea0bc78ac64cb88da49c07f80bf2cf9fb7aff8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d7afca8e4efbf4c455b4663c29ae59fde2f1b671","name":"https://git.kernel.org/stable/c/d7afca8e4efbf4c455b4663c29ae59fde2f1b671","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c07e5ad6539e7e9350d5c65cbf8adb69d1711b15","name":"https://git.kernel.org/stable/c/c07e5ad6539e7e9350d5c65cbf8adb69d1711b15","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ce5a5ad1a8330a2fcfdd9ec2ab341be739e89a18","name":"https://git.kernel.org/stable/c/ce5a5ad1a8330a2fcfdd9ec2ab341be739e89a18","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/217b967ad7887a3e1ebc08f46f6484e081acd4b4","name":"https://git.kernel.org/stable/c/217b967ad7887a3e1ebc08f46f6484e081acd4b4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90420","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90420","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 e3e9367dae1a6392cbb14ab0b2ab5edbf39735c3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 217b967ad7887a3e1ebc08f46f6484e081acd4b4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 3bcdbdaac884a4baa59716cf9bd9470c75276e2d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 d7afca8e4efbf4c455b4663c29ae59fde2f1b671 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.221 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.188 6.1.* 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 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/nilfs2/segment.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"e3e9367dae1a6392cbb14ab0b2ab5edbf39735c3","status":"affected","version":"9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453","versionType":"git"},{"lessThan":"217b967ad7887a3e1ebc08f46f6484e081acd4b4","status":"affected","version":"9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453","versionType":"git"},{"lessThan":"3bcdbdaac884a4baa59716cf9bd9470c75276e2d","status":"affected","version":"9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453","versionType":"git"},{"lessThan":"d7afca8e4efbf4c455b4663c29ae59fde2f1b671","status":"affected","version":"9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453","versionType":"git"},{"lessThan":"c07e5ad6539e7e9350d5c65cbf8adb69d1711b15","status":"affected","version":"9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453","versionType":"git"},{"lessThan":"1fc6df85b4954b6fda9c351843aaca3c06f66d8d","status":"affected","version":"9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453","versionType":"git"},{"lessThan":"8cea0bc78ac64cb88da49c07f80bf2cf9fb7aff8","status":"affected","version":"9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453","versionType":"git"},{"lessThan":"ce5a5ad1a8330a2fcfdd9ec2ab341be739e89a18","status":"affected","version":"9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["fs/nilfs2/segment.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.30"},{"lessThan":"2.6.30","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.270","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.221","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.188","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","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.270","versionStartIncluding":"2.6.30","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.221","versionStartIncluding":"2.6.30","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.188","versionStartIncluding":"2.6.30","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.157","versionStartIncluding":"2.6.30","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.110","versionStartIncluding":"2.6.30","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.52","versionStartIncluding":"2.6.30","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.6","versionStartIncluding":"2.6.30","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"2.6.30","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: fix infinite loop in nilfs_clean_segments()\n\nsyzbot reported a hung task in nilfs_transaction_begin(). This occurs\nbecause the cleaner ioctl falls into an infinite loop if\nnilfs_segctor_construct() repeatedly returns -EROFS (e.g. the device\nis remounted as read-only after an I/O error).\n\nCurrently in nilfs_clean_segments(), if err is non-zero, it logs the\nerror and sleeps but doesn't abort when it encounters a terminal error\nlike -EROFS. This causes the thread to loop forever.\n\nFix this by breaking out of the loop if nilfs_segctor_construct()\nreturns -EROFS. This matches the behaviour in\nnilfs_segctor_write_out(), which also handles -EROFS."}],"providerMetadata":{"dateUpdated":"2026-10-19T09:03:24.266Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/e3e9367dae1a6392cbb14ab0b2ab5edbf39735c3"},{"url":"https://git.kernel.org/stable/c/217b967ad7887a3e1ebc08f46f6484e081acd4b4"},{"url":"https://git.kernel.org/stable/c/3bcdbdaac884a4baa59716cf9bd9470c75276e2d"},{"url":"https://git.kernel.org/stable/c/d7afca8e4efbf4c455b4663c29ae59fde2f1b671"},{"url":"https://git.kernel.org/stable/c/c07e5ad6539e7e9350d5c65cbf8adb69d1711b15"},{"url":"https://git.kernel.org/stable/c/1fc6df85b4954b6fda9c351843aaca3c06f66d8d"},{"url":"https://git.kernel.org/stable/c/8cea0bc78ac64cb88da49c07f80bf2cf9fb7aff8"},{"url":"https://git.kernel.org/stable/c/ce5a5ad1a8330a2fcfdd9ec2ab341be739e89a18"}],"title":"nilfs2: fix infinite loop in nilfs_clean_segments()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-90420","datePublished":"2026-09-17T16:09:44.558Z","dateReserved":"2026-09-11T19:38:34.813Z","dateUpdated":"2026-10-19T09:03:24.266Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-17 17:17:46","lastModifiedDate":"2026-10-19 09:19:36","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"90420","Ordinal":"1","Title":"nilfs2: fix infinite loop in nilfs_clean_segments()","CVE":"CVE-2026-90420","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"90420","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: fix infinite loop in nilfs_clean_segments()\n\nsyzbot reported a hung task in nilfs_transaction_begin(). This occurs\nbecause the cleaner ioctl falls into an infinite loop if\nnilfs_segctor_construct() repeatedly returns -EROFS (e.g. the device\nis remounted as read-only after an I/O error).\n\nCurrently in nilfs_clean_segments(), if err is non-zero, it logs the\nerror and sleeps but doesn't abort when it encounters a terminal error\nlike -EROFS. This causes the thread to loop forever.\n\nFix this by breaking out of the loop if nilfs_segctor_construct()\nreturns -EROFS. This matches the behaviour in\nnilfs_segctor_write_out(), which also handles -EROFS.","Type":"Description","Title":"nilfs2: fix infinite loop in nilfs_clean_segments()"}]}}}