{"api_version":"1","generated_at":"2026-07-23T14:15:22+00:00","cve":"CVE-2026-23267","urls":{"html":"https://cve.report/CVE-2026-23267","api":"https://cve.report/api/cve/CVE-2026-23267.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-23267","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-23267"},"summary":{"title":"f2fs: fix IS_CHECKPOINTED flag inconsistency issue caused by concurrent atomic commit and checkpoint writes","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix IS_CHECKPOINTED flag inconsistency issue caused by concurrent atomic commit and checkpoint writes\n\nDuring SPO tests, when mounting F2FS, an -EINVAL error was returned from\nf2fs_recover_inode_page. The issue occurred under the following scenario\n\nThread A                                     Thread B\nf2fs_ioc_commit_atomic_write\n - f2fs_do_sync_file // atomic = true\n  - f2fs_fsync_node_pages\n    : last_folio = inode folio\n    : schedule before folio_lock(last_folio) f2fs_write_checkpoint\n                                              - block_operations// writeback last_folio\n                                              - schedule before f2fs_flush_nat_entries\n    : set_fsync_mark(last_folio, 1)\n    : set_dentry_mark(last_folio, 1)\n    : folio_mark_dirty(last_folio)\n    - __write_node_folio(last_folio)\n      : f2fs_down_read(&sbi->node_write)//block\n                                              - f2fs_flush_nat_entries\n                                                : {struct nat_entry}->flag |= BIT(IS_CHECKPOINTED)\n                                              - unblock_operations\n                                                : f2fs_up_write(&sbi->node_write)\n                                             f2fs_write_checkpoint//return\n      : f2fs_do_write_node_page()\nf2fs_ioc_commit_atomic_write//return\n                                             SPO\n\nThread A calls f2fs_need_dentry_mark(sbi, ino), and the last_folio has\nalready been written once. However, the {struct nat_entry}->flag did not\nhave the IS_CHECKPOINTED set, causing set_dentry_mark(last_folio, 1) and\nwrite last_folio again after Thread B finishes f2fs_write_checkpoint.\n\nAfter SPO and reboot, it was detected that {struct node_info}->blk_addr\nwas not NULL_ADDR because Thread B successfully write the checkpoint.\n\nThis issue only occurs in atomic write scenarios. For regular file\nfsync operations, the folio must be dirty. If\nblock_operations->f2fs_sync_node_pages successfully submit the folio\nwrite, this path will not be executed. Otherwise, the\nf2fs_write_checkpoint will need to wait for the folio write submission\nto complete, as sbi->nr_pages[F2FS_DIRTY_NODES] > 0. Therefore, the\nsituation where f2fs_need_dentry_mark checks that the {struct\nnat_entry}->flag /wo the IS_CHECKPOINTED flag, but the folio write has\nalready been submitted, will not occur.\n\nTherefore, for atomic file fsync, sbi->node_write should be acquired\nthrough __write_node_folio to ensure that the IS_CHECKPOINTED flag\ncorrectly indicates that the checkpoint write has been completed.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-03-18 18:16:25","updated_at":"2026-05-29 18:41:58"},"problem_types":["NVD-CWE-noinfo"],"metrics":[{"version":"3.1","source":"nvd@nist.gov","type":"Primary","score":"5.5","severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}}],"references":[{"url":"https://git.kernel.org/stable/c/bd66b4c487d5091d2a65d6089e0de36f0c26a4c7","name":"https://git.kernel.org/stable/c/bd66b4c487d5091d2a65d6089e0de36f0c26a4c7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/962c167b0f262b9962207fbeaa531721d55ea00e","name":"https://git.kernel.org/stable/c/962c167b0f262b9962207fbeaa531721d55ea00e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/32bc3c9fe18881d50dd51fd5f26d19fe1190dc0d","name":"https://git.kernel.org/stable/c/32bc3c9fe18881d50dd51fd5f26d19fe1190dc0d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/75e19da068adf0dc5dd269dd157392434b9117d4","name":"https://git.kernel.org/stable/c/75e19da068adf0dc5dd269dd157392434b9117d4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7633a7387eb4d0259d6bea945e1d3469cd135bbc","name":"https://git.kernel.org/stable/c/7633a7387eb4d0259d6bea945e1d3469cd135bbc","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ed81bc5885460905f9160e7b463e5708fd056324","name":"https://git.kernel.org/stable/c/ed81bc5885460905f9160e7b463e5708fd056324","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-23267","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23267","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 608514deba38c8611ad330d6a3c8e2b9a1f68e4b 32bc3c9fe18881d50dd51fd5f26d19fe1190dc0d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 608514deba38c8611ad330d6a3c8e2b9a1f68e4b 75e19da068adf0dc5dd269dd157392434b9117d4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 608514deba38c8611ad330d6a3c8e2b9a1f68e4b 962c167b0f262b9962207fbeaa531721d55ea00e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 608514deba38c8611ad330d6a3c8e2b9a1f68e4b bd66b4c487d5091d2a65d6089e0de36f0c26a4c7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 608514deba38c8611ad330d6a3c8e2b9a1f68e4b ed81bc5885460905f9160e7b463e5708fd056324 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 608514deba38c8611ad330d6a3c8e2b9a1f68e4b 7633a7387eb4d0259d6bea945e1d3469cd135bbc git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.7","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.7 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.164 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.127 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.74 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.13 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.3 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2026","cve_id":"23267","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"linux","cpe5":"linux_kernel","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/f2fs/node.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"32bc3c9fe18881d50dd51fd5f26d19fe1190dc0d","status":"affected","version":"608514deba38c8611ad330d6a3c8e2b9a1f68e4b","versionType":"git"},{"lessThan":"75e19da068adf0dc5dd269dd157392434b9117d4","status":"affected","version":"608514deba38c8611ad330d6a3c8e2b9a1f68e4b","versionType":"git"},{"lessThan":"962c167b0f262b9962207fbeaa531721d55ea00e","status":"affected","version":"608514deba38c8611ad330d6a3c8e2b9a1f68e4b","versionType":"git"},{"lessThan":"bd66b4c487d5091d2a65d6089e0de36f0c26a4c7","status":"affected","version":"608514deba38c8611ad330d6a3c8e2b9a1f68e4b","versionType":"git"},{"lessThan":"ed81bc5885460905f9160e7b463e5708fd056324","status":"affected","version":"608514deba38c8611ad330d6a3c8e2b9a1f68e4b","versionType":"git"},{"lessThan":"7633a7387eb4d0259d6bea945e1d3469cd135bbc","status":"affected","version":"608514deba38c8611ad330d6a3c8e2b9a1f68e4b","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["fs/f2fs/node.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.7"},{"lessThan":"4.7","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.164","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.127","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.74","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.13","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.3","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.164","versionStartIncluding":"4.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.127","versionStartIncluding":"4.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.74","versionStartIncluding":"4.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.13","versionStartIncluding":"4.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.3","versionStartIncluding":"4.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"4.7","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix IS_CHECKPOINTED flag inconsistency issue caused by concurrent atomic commit and checkpoint writes\n\nDuring SPO tests, when mounting F2FS, an -EINVAL error was returned from\nf2fs_recover_inode_page. The issue occurred under the following scenario\n\nThread A                                     Thread B\nf2fs_ioc_commit_atomic_write\n - f2fs_do_sync_file // atomic = true\n  - f2fs_fsync_node_pages\n    : last_folio = inode folio\n    : schedule before folio_lock(last_folio) f2fs_write_checkpoint\n                                              - block_operations// writeback last_folio\n                                              - schedule before f2fs_flush_nat_entries\n    : set_fsync_mark(last_folio, 1)\n    : set_dentry_mark(last_folio, 1)\n    : folio_mark_dirty(last_folio)\n    - __write_node_folio(last_folio)\n      : f2fs_down_read(&sbi->node_write)//block\n                                              - f2fs_flush_nat_entries\n                                                : {struct nat_entry}->flag |= BIT(IS_CHECKPOINTED)\n                                              - unblock_operations\n                                                : f2fs_up_write(&sbi->node_write)\n                                             f2fs_write_checkpoint//return\n      : f2fs_do_write_node_page()\nf2fs_ioc_commit_atomic_write//return\n                                             SPO\n\nThread A calls f2fs_need_dentry_mark(sbi, ino), and the last_folio has\nalready been written once. However, the {struct nat_entry}->flag did not\nhave the IS_CHECKPOINTED set, causing set_dentry_mark(last_folio, 1) and\nwrite last_folio again after Thread B finishes f2fs_write_checkpoint.\n\nAfter SPO and reboot, it was detected that {struct node_info}->blk_addr\nwas not NULL_ADDR because Thread B successfully write the checkpoint.\n\nThis issue only occurs in atomic write scenarios. For regular file\nfsync operations, the folio must be dirty. If\nblock_operations->f2fs_sync_node_pages successfully submit the folio\nwrite, this path will not be executed. Otherwise, the\nf2fs_write_checkpoint will need to wait for the folio write submission\nto complete, as sbi->nr_pages[F2FS_DIRTY_NODES] > 0. Therefore, the\nsituation where f2fs_need_dentry_mark checks that the {struct\nnat_entry}->flag /wo the IS_CHECKPOINTED flag, but the folio write has\nalready been submitted, will not occur.\n\nTherefore, for atomic file fsync, sbi->node_write should be acquired\nthrough __write_node_folio to ensure that the IS_CHECKPOINTED flag\ncorrectly indicates that the checkpoint write has been completed."}],"providerMetadata":{"dateUpdated":"2026-05-11T22:03:33.438Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/32bc3c9fe18881d50dd51fd5f26d19fe1190dc0d"},{"url":"https://git.kernel.org/stable/c/75e19da068adf0dc5dd269dd157392434b9117d4"},{"url":"https://git.kernel.org/stable/c/962c167b0f262b9962207fbeaa531721d55ea00e"},{"url":"https://git.kernel.org/stable/c/bd66b4c487d5091d2a65d6089e0de36f0c26a4c7"},{"url":"https://git.kernel.org/stable/c/ed81bc5885460905f9160e7b463e5708fd056324"},{"url":"https://git.kernel.org/stable/c/7633a7387eb4d0259d6bea945e1d3469cd135bbc"}],"title":"f2fs: fix IS_CHECKPOINTED flag inconsistency issue caused by concurrent atomic commit and checkpoint writes","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-23267","datePublished":"2026-03-18T17:46:09.116Z","dateReserved":"2026-01-13T15:37:45.991Z","dateUpdated":"2026-05-11T22:03:33.438Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-03-18 18:16:25","lastModifiedDate":"2026-05-29 18:41:58","problem_types":["NVD-CWE-noinfo"],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":3.6}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.7","versionEndExcluding":"6.1.164","matchCriteriaId":"BE35EE84-2282-476E-BE47-D8C91A42BD5C"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.6.127","matchCriteriaId":"4A9F36A3-A685-48A0-84B4-6217052BD058"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"6.12.74","matchCriteriaId":"C2968F55-D03F-42BE-A694-F0A37BC8CBE3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"6.18.13","matchCriteriaId":"6BDEF9FB-423E-49F6-991B-9277CC3AF400"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19","versionEndExcluding":"6.19.3","matchCriteriaId":"7853A337-FB2A-4E19-AB47-4E38343532AA"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"23267","Ordinal":"1","Title":"f2fs: fix IS_CHECKPOINTED flag inconsistency issue caused by con","CVE":"CVE-2026-23267","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"23267","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix IS_CHECKPOINTED flag inconsistency issue caused by concurrent atomic commit and checkpoint writes\n\nDuring SPO tests, when mounting F2FS, an -EINVAL error was returned from\nf2fs_recover_inode_page. The issue occurred under the following scenario\n\nThread A                                     Thread B\nf2fs_ioc_commit_atomic_write\n - f2fs_do_sync_file // atomic = true\n  - f2fs_fsync_node_pages\n    : last_folio = inode folio\n    : schedule before folio_lock(last_folio) f2fs_write_checkpoint\n                                              - block_operations// writeback last_folio\n                                              - schedule before f2fs_flush_nat_entries\n    : set_fsync_mark(last_folio, 1)\n    : set_dentry_mark(last_folio, 1)\n    : folio_mark_dirty(last_folio)\n    - __write_node_folio(last_folio)\n      : f2fs_down_read(&sbi->node_write)//block\n                                              - f2fs_flush_nat_entries\n                                                : {struct nat_entry}->flag |= BIT(IS_CHECKPOINTED)\n                                              - unblock_operations\n                                                : f2fs_up_write(&sbi->node_write)\n                                             f2fs_write_checkpoint//return\n      : f2fs_do_write_node_page()\nf2fs_ioc_commit_atomic_write//return\n                                             SPO\n\nThread A calls f2fs_need_dentry_mark(sbi, ino), and the last_folio has\nalready been written once. However, the {struct nat_entry}->flag did not\nhave the IS_CHECKPOINTED set, causing set_dentry_mark(last_folio, 1) and\nwrite last_folio again after Thread B finishes f2fs_write_checkpoint.\n\nAfter SPO and reboot, it was detected that {struct node_info}->blk_addr\nwas not NULL_ADDR because Thread B successfully write the checkpoint.\n\nThis issue only occurs in atomic write scenarios. For regular file\nfsync operations, the folio must be dirty. If\nblock_operations->f2fs_sync_node_pages successfully submit the folio\nwrite, this path will not be executed. Otherwise, the\nf2fs_write_checkpoint will need to wait for the folio write submission\nto complete, as sbi->nr_pages[F2FS_DIRTY_NODES] > 0. Therefore, the\nsituation where f2fs_need_dentry_mark checks that the {struct\nnat_entry}->flag /wo the IS_CHECKPOINTED flag, but the folio write has\nalready been submitted, will not occur.\n\nTherefore, for atomic file fsync, sbi->node_write should be acquired\nthrough __write_node_folio to ensure that the IS_CHECKPOINTED flag\ncorrectly indicates that the checkpoint write has been completed.","Type":"Description","Title":"f2fs: fix IS_CHECKPOINTED flag inconsistency issue caused by con"}]}}}