{"id":"CVE-2021-4149","details":"A vulnerability was found in btrfs_alloc_tree_b in fs/btrfs/extent-tree.c in the Linux kernel due to an improper lock operation in btrfs. In this flaw, a user with a local privilege may cause a denial of service (DOS) due to a deadlock problem.","modified":"2026-03-14T11:14:37.951200Z","published":"2022-03-23T20:15:09.997Z","related":["SUSE-SU-2022:0080-1","SUSE-SU-2022:0169-1","SUSE-SU-2022:0197-1","SUSE-SU-2022:0198-1","SUSE-SU-2022:0288-1","SUSE-SU-2022:0289-1","SUSE-SU-2022:0362-1","SUSE-SU-2022:0364-1","SUSE-SU-2022:0366-1","SUSE-SU-2022:0367-1","SUSE-SU-2022:0371-1","SUSE-SU-2022:0477-1","SUSE-SU-2022:0555-1","openSUSE-SU-2022:0169-1","openSUSE-SU-2022:0198-1","openSUSE-SU-2022:0366-1"],"references":[{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2022/07/msg00000.html"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2026485"},{"type":"FIX","url":"https://lkml.org/lkml/2021/10/18/885"},{"type":"EVIDENCE","url":"https://lkml.org/lkml/2021/9/13/2565"}],"affected":[{"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"5.15"}]},{"events":[{"introduced":"0"},{"last_affected":"5.15-NA"}]},{"events":[{"introduced":"0"},{"last_affected":"5.15-rc1"}]},{"events":[{"introduced":"0"},{"last_affected":"5.15-rc2"}]},{"events":[{"introduced":"0"},{"last_affected":"5.15-rc3"}]},{"events":[{"introduced":"0"},{"last_affected":"5.15-rc4"}]},{"events":[{"introduced":"0"},{"last_affected":"5.15-rc5"}]},{"events":[{"introduced":"0"},{"last_affected":"9.0"}]}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-4149.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}