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CVE-2021-4149

Date: March 23, 2022

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.

Severity Score

Related Resources (9)

https://security-tracker.debian.org/tracker/CVE-2021-4149
https://lists.debian.org/debian-lts-announce/2022/07/msg00000.html
https://bugzilla.redhat.com/show_bug.cgi?id=2026485
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-4149
https://lkml.org/lkml/2021/9/13/2565
https://access.redhat.com/security/cve/CVE-2021-4149
https://lkml.org/lkml/2021/10/18/885
https://nvd.nist.gov/vuln/detail/CVE-2021-4149
https://www.mend.io/vulnerability-database/CVE-2021-4149

Severity Score

Weakness Type (CWE)

Improper Locking

CWE-667

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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