PT-2021-7231 · Linux+5 · Linux Kernel+5

Hao Sun · Published 2021-10-18 · Updated 2023-08-14 · CVE-2021-4149

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A flaw in the btrfs alloc tree b function in the Linux kernel's btrfs file system, specifically in fs/btrfs/extent-tree.c, is due to an improper lock operation. This issue can cause a denial of service (DOS) due to a deadlock problem, potentially allowing a user with local privileges to exploit it.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

DoS

Improper Locking

Weakness Enumeration

CWE-667

Related Identifiers

ALT-PU-2021-3330

ALT-PU-2021-3358

ALT-PU-2021-3563

ALT-PU-2021-3573

ALT-PU-2021-3660

ALT-PU-2022-1240

ALT-PU-2022-1419

ALT-PU-2022-1421

ALT-PU-2023-1814

ALT-PU-2023-4894

BDU:2022-03928

CVE-2021-4149

DLA-3065-1

OESA-2021-1475

OPENSUSE-SU-2022:0169-1

OPENSUSE-SU-2022:0198-1

OPENSUSE-SU-2022:0366-1

OPENSUSE-SU-2022_0169-1

OPENSUSE-SU-2022_0198-1

OPENSUSE-SU-2022_0366-1

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

USN-5466-1

USN-6001-1

USN-6013-1

USN-6014-1

Affected Products

Alt Linux

Astra Linux

Debian

Linux Kernel

Suse

Ubuntu

References · 347

• 🔥 https://lkml.org/lkml/2021/9/13/2565 · Exploit
• 🔥 https://lkml.org/lkml/2021/10/18/885 · Exploit
• https://ubuntu.com/security/CVE-2021-28713 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-4037 · Security Note
• https://ubuntu.com/security/CVE-2021-3772 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-4149 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-3646 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-4203 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2022:0169-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-1095 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-47929 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-0617 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-1516 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-21499 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2022:0371-1 · Vendor Advisory