CVE-2021-4149 describes a denial-of-service vulnerability in the Linux kernel's btrfs filesystem, specifically within the btrfs_alloc_tree_b function, affecting Debian and other Linux distributions. This flaw, rated Medium severity (CVSS 5.5), allows a local attacker with low privileges to cause a system deadlock due to an improper lock operation. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 5.15CPE matchmatch criteria | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | ||
5.15CPE matchmatch criteria | cpe:2.3:o:linux:linux_kernel:5.15:-:*:*:*:*:*:* | ||
5.15CPE matchmatch criteria | cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:* | ||
5.15CPE matchmatch criteria | cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:* | ||
5.15CPE matchmatch criteria | cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
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.
Mar 8, 2022kernel: Improper lock operation in btrfs
Oct 18, 2021