{ "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" } } } }