SB2022122720 - Denial of service in Linux kernel x86 KVM
Published: December 27, 2022
Security Bulletin ID
SB2022122720
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote 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-2022-45869)
The vulnerability allows a remote user to escalate privileges on the system.
The vulnerability exists due to a race condition within the x86 KVM subsystem in the Linux kernel when nested virtualisation and the TDP MMU are enabled. A remote user on the guest OS can exploit the race and crash the host OS.
Remediation
Install update from vendor's website.