SB2021120922 - Advanced Virtualization for RHEL 8 update for the virt:8.2 and virt-devel:8.2 modules
Published: December 9, 2021
Security Bulletin ID
SB2021120922
Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Adjecent network
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Use-after-free (CVE-ID: CVE-2021-3748)
The vulnerability allows a remote guest to compromise vulnerable system.
The vulnerability exists due to a use-after-free error when in the virtio-net device of QEMU. A malicious guest can trigger the use-after-free error and execute arbitrary code on the host system with QEMU privileges.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
Remediation
Install update from vendor's website.