Show plain JSON{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2021-46972", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-27T18:42:55.943Z", "datePublished": "2024-02-27T18:47:07.276Z", "dateUpdated": "2025-05-04T07:01:26.878Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-05-04T07:01:26.878Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\novl: fix leaked dentry\n\nSince commit 6815f479ca90 (\"ovl: use only uppermetacopy state in\novl_lookup()\"), overlayfs doesn't put temporary dentry when there is a\nmetacopy error, which leads to dentry leaks when shutting down the related\nsuperblock:\n\n overlayfs: refusing to follow metacopy origin for (/file0)\n ...\n BUG: Dentry (____ptrval____){i=3f33,n=file3} still in use (1) [unmount of overlay overlay]\n ...\n WARNING: CPU: 1 PID: 432 at umount_check.cold+0x107/0x14d\n CPU: 1 PID: 432 Comm: unmount-overlay Not tainted 5.12.0-rc5 #1\n ...\n RIP: 0010:umount_check.cold+0x107/0x14d\n ...\n Call Trace:\n d_walk+0x28c/0x950\n ? dentry_lru_isolate+0x2b0/0x2b0\n ? __kasan_slab_free+0x12/0x20\n do_one_tree+0x33/0x60\n shrink_dcache_for_umount+0x78/0x1d0\n generic_shutdown_super+0x70/0x440\n kill_anon_super+0x3e/0x70\n deactivate_locked_super+0xc4/0x160\n deactivate_super+0xfa/0x140\n cleanup_mnt+0x22e/0x370\n __cleanup_mnt+0x1a/0x30\n task_work_run+0x139/0x210\n do_exit+0xb0c/0x2820\n ? __kasan_check_read+0x1d/0x30\n ? find_held_lock+0x35/0x160\n ? lock_release+0x1b6/0x660\n ? mm_update_next_owner+0xa20/0xa20\n ? reacquire_held_locks+0x3f0/0x3f0\n ? __sanitizer_cov_trace_const_cmp4+0x22/0x30\n do_group_exit+0x135/0x380\n __do_sys_exit_group.isra.0+0x20/0x20\n __x64_sys_exit_group+0x3c/0x50\n do_syscall_64+0x45/0x70\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n ...\n VFS: Busy inodes after unmount of overlay. Self-destruct in 5 seconds. Have a nice day...\n\nThis fix has been tested with a syzkaller reproducer."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/overlayfs/namei.c"], "versions": [{"version": "6815f479ca90ee7fd2e28b2a420f796b974155fe", "lessThan": "71d58457a8afc650da5d3292a7f7029317654d95", "status": "affected", "versionType": "git"}, {"version": "6815f479ca90ee7fd2e28b2a420f796b974155fe", "lessThan": "cf3e3330bc5719fa9d658e3e2f596bde89344a94", "status": "affected", "versionType": "git"}, {"version": "6815f479ca90ee7fd2e28b2a420f796b974155fe", "lessThan": "d587cfaef72b1b6f4b2774827123bce91f497cc8", "status": "affected", "versionType": "git"}, {"version": "6815f479ca90ee7fd2e28b2a420f796b974155fe", "lessThan": "eaab1d45cdb4bb0c846bd23c3d666d5b90af7b41", "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/overlayfs/namei.c"], "versions": [{"version": "5.8", "status": "affected"}, {"version": "0", "lessThan": "5.8", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.35", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.11.19", "lessThanOrEqual": "5.11.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.12.2", "lessThanOrEqual": "5.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.13", "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": "5.8", "versionEndExcluding": "5.10.35"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "5.11.19"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "5.12.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "5.13"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/71d58457a8afc650da5d3292a7f7029317654d95"}, {"url": "https://git.kernel.org/stable/c/cf3e3330bc5719fa9d658e3e2f596bde89344a94"}, {"url": "https://git.kernel.org/stable/c/d587cfaef72b1b6f4b2774827123bce91f497cc8"}, {"url": "https://git.kernel.org/stable/c/eaab1d45cdb4bb0c846bd23c3d666d5b90af7b41"}], "title": "ovl: fix leaked dentry", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2024-06-28T17:00:35.229463Z", "id": "CVE-2021-46972", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-28T17:00:43.713Z"}}, {"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:17:42.888Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/71d58457a8afc650da5d3292a7f7029317654d95", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/cf3e3330bc5719fa9d658e3e2f596bde89344a94", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/d587cfaef72b1b6f4b2774827123bce91f497cc8", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/eaab1d45cdb4bb0c846bd23c3d666d5b90af7b41", "tags": ["x_transferred"]}]}]}}