SB2023012646 - Denial of service in Linux kernel SVM
Published: January 26, 2023
Security Bulletin ID
SB2023012646
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) Expected behavior violation (CVE-ID: CVE-2022-3344)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to an error in the KVM's AMD nested virtualization (SVM). A malicious L1 guest can purposely fail to intercept the shutdown of a cooperative nested guest (L2), possibly leading to a page fault and kernel panic in the host (L0).
Remediation
Install update from vendor's website.