#VU59084 Race condition


Published: 2021-12-22

Vulnerability identifier: #VU59084

Vulnerability risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-20321

CWE-ID: CWE-362

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

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

The vulnerability exists due to a race condition when accessing file object in the Linux kernel OverlayFS subsystem. A local user can rename files in specific way with OverlayFS and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Linux kernel: 5.15 rc1 - 5.15 rc4


CPE

External links
http://bugzilla.redhat.com/show_bug.cgi?id=2013242


Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?


Latest bulletins with this vulnerability