{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-53311","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-09-16T16:08:59.562Z","datePublished":"2025-09-16T16:11:49.099Z","dateUpdated":"2026-05-11T19:42:29.661Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T19:42:29.661Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: fix use-after-free of nilfs_root in dirtying inodes via iput\n\nDuring unmount process of nilfs2, nothing holds nilfs_root structure after\nnilfs2 detaches its writer in nilfs_detach_log_writer().  Previously,\nnilfs_evict_inode() could cause use-after-free read for nilfs_root if\ninodes are left in \"garbage_list\" and released by nilfs_dispose_list at\nthe end of nilfs_detach_log_writer(), and this bug was fixed by commit\n9b5a04ac3ad9 (\"nilfs2: fix use-after-free bug of nilfs_root in\nnilfs_evict_inode()\").\n\nHowever, it turned out that there is another possibility of UAF in the\ncall path where mark_inode_dirty_sync() is called from iput():\n\nnilfs_detach_log_writer()\n  nilfs_dispose_list()\n    iput()\n      mark_inode_dirty_sync()\n        __mark_inode_dirty()\n          nilfs_dirty_inode()\n            __nilfs_mark_inode_dirty()\n              nilfs_load_inode_block() --> causes UAF of nilfs_root struct\n\nThis can happen after commit 0ae45f63d4ef (\"vfs: add support for a\nlazytime mount option\"), which changed iput() to call\nmark_inode_dirty_sync() on its final reference if i_state has I_DIRTY_TIME\nflag and i_nlink is non-zero.\n\nThis issue appears after commit 28a65b49eb53 (\"nilfs2: do not write dirty\ndata after degenerating to read-only\") when using the syzbot reproducer,\nbut the issue has potentially existed before.\n\nFix this issue by adding a \"purging flag\" to the nilfs structure, setting\nthat flag while disposing the \"garbage_list\" and checking it in\n__nilfs_mark_inode_dirty().\n\nUnlike commit 9b5a04ac3ad9 (\"nilfs2: fix use-after-free bug of nilfs_root\nin nilfs_evict_inode()\"), this patch does not rely on ns_writer to\ndetermine whether to skip operations, so as not to break recovery on\nmount.  The nilfs_salvage_orphan_logs routine dirties the buffer of\nsalvaged data before attaching the log writer, so changing\n__nilfs_mark_inode_dirty() to skip the operation when ns_writer is NULL\nwill cause recovery write to fail.  The purpose of using the cleanup-only\nflag is to allow for narrowing of such conditions."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/nilfs2/inode.c","fs/nilfs2/segment.c","fs/nilfs2/the_nilfs.h"],"versions":[{"version":"0ae45f63d4ef8d8eeec49c7d8b44a1775fff13e8","lessThan":"11afd67f1b3c28eb216e50a3ca8dbcb69bb71793","status":"affected","versionType":"git"},{"version":"0ae45f63d4ef8d8eeec49c7d8b44a1775fff13e8","lessThan":"a3c3b4cbf9b8554120fb230e6516e980c6277487","status":"affected","versionType":"git"},{"version":"0ae45f63d4ef8d8eeec49c7d8b44a1775fff13e8","lessThan":"d2c539c216cce74837a9cf5804eb205939b82227","status":"affected","versionType":"git"},{"version":"0ae45f63d4ef8d8eeec49c7d8b44a1775fff13e8","lessThan":"37207240872456fbab44a110bde6640445233963","status":"affected","versionType":"git"},{"version":"0ae45f63d4ef8d8eeec49c7d8b44a1775fff13e8","lessThan":"3645510cf926e6af2f4d44899370d7e5331c93bd","status":"affected","versionType":"git"},{"version":"0ae45f63d4ef8d8eeec49c7d8b44a1775fff13e8","lessThan":"7532ff6edbf5242376b24a95a2fefb59bb653e5a","status":"affected","versionType":"git"},{"version":"0ae45f63d4ef8d8eeec49c7d8b44a1775fff13e8","lessThan":"5828d5f5dc877dcfdd7b23102e978e2ecfd86d82","status":"affected","versionType":"git"},{"version":"0ae45f63d4ef8d8eeec49c7d8b44a1775fff13e8","lessThan":"f8654743a0e6909dc634cbfad6db6816f10f3399","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/nilfs2/inode.c","fs/nilfs2/segment.c","fs/nilfs2/the_nilfs.h"],"versions":[{"version":"4.0","status":"affected"},{"version":"0","lessThan":"4.0","status":"unaffected","versionType":"semver"},{"version":"4.14.323","lessThanOrEqual":"4.14.*","status":"unaffected","versionType":"semver"},{"version":"4.19.292","lessThanOrEqual":"4.19.*","status":"unaffected","versionType":"semver"},{"version":"5.4.254","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.191","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.127","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.46","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.4.11","lessThanOrEqual":"6.4.*","status":"unaffected","versionType":"semver"},{"version":"6.5","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":"4.0","versionEndExcluding":"4.14.323"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.0","versionEndExcluding":"4.19.292"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.0","versionEndExcluding":"5.4.254"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.0","versionEndExcluding":"5.10.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.0","versionEndExcluding":"5.15.127"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.0","versionEndExcluding":"6.1.46"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.0","versionEndExcluding":"6.4.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.0","versionEndExcluding":"6.5"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/11afd67f1b3c28eb216e50a3ca8dbcb69bb71793"},{"url":"https://git.kernel.org/stable/c/a3c3b4cbf9b8554120fb230e6516e980c6277487"},{"url":"https://git.kernel.org/stable/c/d2c539c216cce74837a9cf5804eb205939b82227"},{"url":"https://git.kernel.org/stable/c/37207240872456fbab44a110bde6640445233963"},{"url":"https://git.kernel.org/stable/c/3645510cf926e6af2f4d44899370d7e5331c93bd"},{"url":"https://git.kernel.org/stable/c/7532ff6edbf5242376b24a95a2fefb59bb653e5a"},{"url":"https://git.kernel.org/stable/c/5828d5f5dc877dcfdd7b23102e978e2ecfd86d82"},{"url":"https://git.kernel.org/stable/c/f8654743a0e6909dc634cbfad6db6816f10f3399"}],"title":"nilfs2: fix use-after-free of nilfs_root in dirtying inodes via iput","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.8,"attackVector":"LOCAL","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"id":"CVE-2023-53311","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-01-14T18:24:44.425794Z"}}}],"problemTypes":[{"descriptions":[{"lang":"en","type":"CWE","cweId":"CWE-416","description":"CWE-416 Use After Free"}]}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-01-14T18:32:57.096Z"}}]}}