Vulnerability CVE-2021-4149
Published: 2022-03-23

Description:
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.

Type:

CWE-667

 (Improper Locking)

CVSS2 => (AV:L/AC:L/Au:N/C:N/I:N/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
2.1/10
2.9/10
3.9/10
Exploit range
Attack complexity
Authentication
Local
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Partial
Affected software
Linux -> Linux kernel 

 References:
https://lkml.org/lkml/2021/9/13/2565
https://bugzilla.redhat.com/show_bug.cgi?id=2026485
https://lkml.org/lkml/2021/10/18/885
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