[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"repo-stars":3,"vuln-CVE-2021-46972":6},{"stargazers_count":4,"fetched_at":5},7,"2026-06-04T08:53:30.047Z",{"id":7,"descriptions":8,"cisa":9,"weaknesses":10,"exploits":20,"aliases":21,"duplicate_of":9,"upstream":22,"downstream":23,"duplicates":32,"related":33,"reserved_at":9,"published_at":34,"modified_at":35,"state":36,"summary":37,"references_raw":46,"kevs":65,"epss":66,"epss_history":69,"metrics":296,"affected":302},"CVE-2021-46972","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.",null,[11],{"_key":12,"id":12,"name":13,"description":14,"type":15,"status":16,"abstraction":17,"likelihood_of_exploit":18,"capec":19},"CWE-401","Missing Release of Memory after Effective Lifetime","The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and 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