CVE-2026-53368

{"id": "CVE-2026-53368", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.1, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 5.2, "exploitabilityScore": 1.8}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "88bd02c9472a166b706284a34a84f1243322d782", "lessThan": "bedb710b63ae1bd617e65d0a8cf6cea1200b3753", "versionType": "git"}, {"status": "affected", "version": "88bd02c9472a166b706284a34a84f1243322d782", "lessThan": "b28a83ea4934215b5de906c3ee4fbfbc651573e0", "versionType": "git"}, {"status": "affected", "version": "88bd02c9472a166b706284a34a84f1243322d782", "lessThan": "019f9dda7f66e55eb94cd32e1d3fff5835f73fbc", "versionType": "git"}], "programFiles": ["fs/f2fs/node.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "3.18"}, {"status": "unaffected", "version": "0", "lessThan": "3.18", "versionType": "semver"}, {"status": "unaffected", "version": "6.18.30", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.0.7", "versionType": "semver", "lessThanOrEqual": "7.0.*"}, {"status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["fs/f2fs/node.c"], "defaultStatus": "affected"}]}], "published": "2026-07-19T09:17:01.903", "references": [{"url": "https://git.kernel.org/stable/c/019f9dda7f66e55eb94cd32e1d3fff5835f73fbc", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/b28a83ea4934215b5de906c3ee4fbfbc651573e0", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/bedb710b63ae1bd617e65d0a8cf6cea1200b3753", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix fsck inconsistency caused by incorrect nat_entry flag usage\n\nf2fs_need_dentry_mark() reads nat_entry flags without mutual exclusion\nwith the checkpoint path, which can result in an incorrect inode block\nmarking state. The scenario is as follows:\n\ncreate & write & fsync 'file A' write checkpoint\n- f2fs_do_sync_file // inline inode\n - f2fs_write_inode // inode folio is dirty\n - f2fs_write_checkpoint\n - f2fs_flush_merged_writes\n - f2fs_sync_node_pages\n - f2fs_fsync_node_pages // no dirty node\n - f2fs_need_inode_block_update // return true\n - f2fs_fsync_node_pages // inode dirtied\n - f2fs_need_dentry_mark //return true\n - f2fs_flush_nat_entries\n - f2fs_write_checkpoint end\n - __write_node_folio // inode with DENT_BIT_SHIFT set\n SPO, \"fsck --dry-run\" find inode has already checkpointed but still\n with DENT_BIT_SHIFT set\n\nThe state observed by f2fs_need_dentry_mark() can differ from the state\nobserved in __write_node_folio() after acquiring sbi->node_write. The\nroot cause is that the semantics of IS_CHECKPOINTED and\nHAS_FSYNCED_INODE are only guaranteed after the checkpoint write has\nfully completed.\n\nThis patch moves set_dentry_mark() into __write_node_folio() and\nprotects it with the sbi->node_write lock."}], "lastModified": "2026-07-29T16:55:46.613", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1D338BAC-AB8F-4767-B816-F8E37E140F88", "versionEndExcluding": "6.18.30", "versionStartIncluding": "3.18"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D0893CA7-9AE6-4DFE-AC75-48967D73AD8E", "versionEndExcluding": "7.0.7", "versionStartIncluding": "6.19"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}