Denial of service in Linux kernel hfsplus

Published: 2024-05-08 | Updated: 2025-05-14

Risk	Low
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2021-46989
CWE-ID	CWE-833
Exploitation vector	Local
Public exploit	N/A
Vulnerable software	Linux kernel Operating systems & Components / Operating system
Vendor	Linux Foundation

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Deadlock

EUVDB-ID: #VU89261

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-46989

CWE-ID: CWE-833 - Deadlock

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to deadlock within the inhfsplus_file_truncate() function in fs/hfsplus/extents.c. A local user can crash the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Linux kernel: 4.19 - 5.13 rc5

CPE2.3

External links

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.