{"api_version":"1","generated_at":"2026-09-15T05:44:08+00:00","cve":"CVE-2026-89566","urls":{"html":"https://cve.report/CVE-2026-89566","api":"https://cve.report/api/cve/CVE-2026-89566.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-89566","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-89566"},"summary":{"title":"jbd2: check need_resched() when skipping busy checkpoint buffers","description":"In the Linux kernel, the following vulnerability has been resolved:\n\njbd2: check need_resched() when skipping busy checkpoint buffers\n\njournal_shrink_one_cp_list() skips busy checkpoint buffers when called\nwith JBD2_SHRINK_BUSY_SKIP.  The continue statement on this path also\nskips the need_resched() check at the end of the loop body.\n\nConsequently, when a checkpoint list contains mostly busy buffers, the\nshrinker can walk the entire list while holding journal->j_list_lock,\neven when a reschedule has been requested.  Large checkpoint lists under\nmemory pressure can therefore cause long lock hold times and leave other\nCPUs spinning on j_list_lock, resulting in soft lockups or RCU stalls.\n\nRoute the busy-buffer path through the need_resched() check so that the\nshrinker can release j_list_lock and reschedule promptly, restoring\nparity with the clean-buffer path, which already checks need_resched().\nThis does not change which checkpoint buffers are eligible for removal.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-11 20:19:40","updated_at":"2026-09-11 20:19:40"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/f213e12ff5c9590b1034ae8da0e6d09665c772d0","name":"https://git.kernel.org/stable/c/f213e12ff5c9590b1034ae8da0e6d09665c772d0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f83c23286e54180cdc83a36463a60003534cc290","name":"https://git.kernel.org/stable/c/f83c23286e54180cdc83a36463a60003534cc290","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f9182a85991a0ad5cd2940df6db75f40ad90028c","name":"https://git.kernel.org/stable/c/f9182a85991a0ad5cd2940df6db75f40ad90028c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/595cac7f1b32d009b97f83dd2b2d6a1a445e9bb4","name":"https://git.kernel.org/stable/c/595cac7f1b32d009b97f83dd2b2d6a1a445e9bb4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89566","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89566","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b98dba273a0e47dbfade89c9af73c5b012a4eabb f83c23286e54180cdc83a36463a60003534cc290 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b98dba273a0e47dbfade89c9af73c5b012a4eabb f9182a85991a0ad5cd2940df6db75f40ad90028c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b98dba273a0e47dbfade89c9af73c5b012a4eabb 595cac7f1b32d009b97f83dd2b2d6a1a445e9bb4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b98dba273a0e47dbfade89c9af73c5b012a4eabb f213e12ff5c9590b1034ae8da0e6d09665c772d0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9c31bb2684f8035beca0275349d19d679b679ffb git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5fda50e262e65bd553ff777c4b280afd1495a18b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 557fda9ed70ebf8eda2620ba3d746215285a1303 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.15.129 5.16 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.1.50 6.2 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.4.13 6.5 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.5","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.5 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.109 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.50 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.4 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":"89566","cve":"CVE-2026-89566","epss":"0.002000000","percentile":"0.099570000","score_date":"2026-09-14","updated_at":"2026-09-15 00:00:43"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/jbd2/checkpoint.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"f83c23286e54180cdc83a36463a60003534cc290","status":"affected","version":"b98dba273a0e47dbfade89c9af73c5b012a4eabb","versionType":"git"},{"lessThan":"f9182a85991a0ad5cd2940df6db75f40ad90028c","status":"affected","version":"b98dba273a0e47dbfade89c9af73c5b012a4eabb","versionType":"git"},{"lessThan":"595cac7f1b32d009b97f83dd2b2d6a1a445e9bb4","status":"affected","version":"b98dba273a0e47dbfade89c9af73c5b012a4eabb","versionType":"git"},{"lessThan":"f213e12ff5c9590b1034ae8da0e6d09665c772d0","status":"affected","version":"b98dba273a0e47dbfade89c9af73c5b012a4eabb","versionType":"git"},{"status":"affected","version":"9c31bb2684f8035beca0275349d19d679b679ffb","versionType":"git"},{"status":"affected","version":"5fda50e262e65bd553ff777c4b280afd1495a18b","versionType":"git"},{"status":"affected","version":"557fda9ed70ebf8eda2620ba3d746215285a1303","versionType":"git"},{"lessThan":"5.16","status":"affected","version":"5.15.129","versionType":"semver"},{"lessThan":"6.2","status":"affected","version":"6.1.50","versionType":"semver"},{"lessThan":"6.5","status":"affected","version":"6.4.13","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["fs/jbd2/checkpoint.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.5"},{"lessThan":"6.5","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.109","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.50","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.4","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":"6.12.109","versionStartIncluding":"6.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.50","versionStartIncluding":"6.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.4","versionStartIncluding":"6.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"6.5","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.129","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.50","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.4.13","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\njbd2: check need_resched() when skipping busy checkpoint buffers\n\njournal_shrink_one_cp_list() skips busy checkpoint buffers when called\nwith JBD2_SHRINK_BUSY_SKIP.  The continue statement on this path also\nskips the need_resched() check at the end of the loop body.\n\nConsequently, when a checkpoint list contains mostly busy buffers, the\nshrinker can walk the entire list while holding journal->j_list_lock,\neven when a reschedule has been requested.  Large checkpoint lists under\nmemory pressure can therefore cause long lock hold times and leave other\nCPUs spinning on j_list_lock, resulting in soft lockups or RCU stalls.\n\nRoute the busy-buffer path through the need_resched() check so that the\nshrinker can release j_list_lock and reschedule promptly, restoring\nparity with the clean-buffer path, which already checks need_resched().\nThis does not change which checkpoint buffers are eligible for removal."}],"providerMetadata":{"dateUpdated":"2026-09-11T19:44:36.599Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/f83c23286e54180cdc83a36463a60003534cc290"},{"url":"https://git.kernel.org/stable/c/f9182a85991a0ad5cd2940df6db75f40ad90028c"},{"url":"https://git.kernel.org/stable/c/595cac7f1b32d009b97f83dd2b2d6a1a445e9bb4"},{"url":"https://git.kernel.org/stable/c/f213e12ff5c9590b1034ae8da0e6d09665c772d0"}],"title":"jbd2: check need_resched() when skipping busy checkpoint buffers","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-89566","datePublished":"2026-09-11T19:44:36.599Z","dateReserved":"2026-09-11T19:38:34.726Z","dateUpdated":"2026-09-11T19:44:36.599Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-11 20:19:40","lastModifiedDate":"2026-09-11 20:19:40","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"89566","Ordinal":"1","Title":"jbd2: check need_resched() when skipping busy checkpoint buffers","CVE":"CVE-2026-89566","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"89566","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\njbd2: check need_resched() when skipping busy checkpoint buffers\n\njournal_shrink_one_cp_list() skips busy checkpoint buffers when called\nwith JBD2_SHRINK_BUSY_SKIP.  The continue statement on this path also\nskips the need_resched() check at the end of the loop body.\n\nConsequently, when a checkpoint list contains mostly busy buffers, the\nshrinker can walk the entire list while holding journal->j_list_lock,\neven when a reschedule has been requested.  Large checkpoint lists under\nmemory pressure can therefore cause long lock hold times and leave other\nCPUs spinning on j_list_lock, resulting in soft lockups or RCU stalls.\n\nRoute the busy-buffer path through the need_resched() check so that the\nshrinker can release j_list_lock and reschedule promptly, restoring\nparity with the clean-buffer path, which already checks need_resched().\nThis does not change which checkpoint buffers are eligible for removal.","Type":"Description","Title":"jbd2: check need_resched() when skipping busy checkpoint buffers"}]}}}