CVE-2021-4149 — Improper Locking in Kernel

CWE-667 — Improper Locking14 documents8 sources
Severity
5.5MEDIUMNVD
OSV6.5OSV5.9
EPSS
0.1%
top 70.32%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
Linux KernelDebian LinuxDebian Linux+1 more
Timeline
PublishedMar 23
Latest updateApr 12

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.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 1.8 | Impact: 3.6

Affected Packages6 packages

▶NVDlinux/linux_kernel< 5.15+1
▶Debianlinux/linux_kernel< 5.14.16-1+2
▶Ubuntulinux/linux_kernel< 4.15.0-184.194+1
▶CVEListV5linux/linux_kernelkernel 5.15 rc6
▶debiandebian/linux< linux 5.14.16-1 (bookworm)

Also affects: Debian Linux 9.0

Patches

Patch: lkml.org ↗Patch: lkml.org ↗

🔴Vulnerability Details

5
OSV
linux, linux-kvm, linux-lts-xenial vulnerabilities↗2023-04-12
▶
OSV
linux-aws vulnerabilities↗2023-04-06
▶
OSV
linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-gcp, linux-gcp-4.15, linux-hwe, linux-kvm, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities↗2022-06-08
▶
GHSA
GHSA-j26f-m94f-4hr4: A vulnerability was found in btrfs_alloc_tree_b in fs/btrfs/extent-tree↗2022-03-24
▶
OSV
CVE-2021-4149: A vulnerability was found in btrfs_alloc_tree_b in fs/btrfs/extent-tree↗2022-03-23
▶

📋Vendor Advisories

8
Ubuntu
Linux kernel (AWS) vulnerabilities↗2023-04-12
▶
Ubuntu
Linux kernel vulnerabilities↗2023-04-12
▶
Ubuntu
Linux kernel (AWS) vulnerabilities↗2023-04-06
▶
CISA ICS
Siemens SCALANCE, RUGGEDCOM Third-Party↗2023-03-16
▶
Ubuntu
Linux kernel vulnerabilities↗2022-06-08
▶