{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-23267","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-01-13T15:37:45.991Z","datePublished":"2026-03-18T17:46:09.116Z","dateUpdated":"2026-05-11T22:03:33.438Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T22:03:33.438Z"},"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."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/f2fs/node.c"],"versions":[{"version":"608514deba38c8611ad330d6a3c8e2b9a1f68e4b","lessThan":"32bc3c9fe18881d50dd51fd5f26d19fe1190dc0d","status":"affected","versionType":"git"},{"version":"608514deba38c8611ad330d6a3c8e2b9a1f68e4b","lessThan":"75e19da068adf0dc5dd269dd157392434b9117d4","status":"affected","versionType":"git"},{"version":"608514deba38c8611ad330d6a3c8e2b9a1f68e4b","lessThan":"962c167b0f262b9962207fbeaa531721d55ea00e","status":"affected","versionType":"git"},{"version":"608514deba38c8611ad330d6a3c8e2b9a1f68e4b","lessThan":"bd66b4c487d5091d2a65d6089e0de36f0c26a4c7","status":"affected","versionType":"git"},{"version":"608514deba38c8611ad330d6a3c8e2b9a1f68e4b","lessThan":"ed81bc5885460905f9160e7b463e5708fd056324","status":"affected","versionType":"git"},{"version":"608514deba38c8611ad330d6a3c8e2b9a1f68e4b","lessThan":"7633a7387eb4d0259d6bea945e1d3469cd135bbc","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/f2fs/node.c"],"versions":[{"version":"4.7","status":"affected"},{"version":"0","lessThan":"4.7","status":"unaffected","versionType":"semver"},{"version":"6.1.164","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.127","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.74","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.13","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19.3","lessThanOrEqual":"6.19.*","status":"unaffected","versionType":"semver"},{"version":"7.0","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.7","versionEndExcluding":"6.1.164"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.7","versionEndExcluding":"6.6.127"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.7","versionEndExcluding":"6.12.74"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.7","versionEndExcluding":"6.18.13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.7","versionEndExcluding":"6.19.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.7","versionEndExcluding":"7.0"}]}]}],"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"}}}}