SB2021122207 - Race condition in Linux kernel
Published: December 22, 2021
Security Bulletin ID
SB2021122207
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Race condition (CVE-ID: CVE-2021-20321)
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.
Remediation
Install update from vendor's website.