SB2018062215 - Fedora 27 update for kernel, kernel-tools
Published: June 22, 2018 Updated: April 24, 2025
Security Bulletin ID
SB2018062215
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Privilege escalation (CVE-ID: CVE-2018-12904)
The vulnerability allows a local attacker to gain elevated privileges on the target system.
The vulnerability exists due to insufficient checking of the current privilege level (CPL) for Virtual Machine Extensions (VMX) instructions by the arch/x86/kvm/vmx.c source code file when nested virtualization is used. A local attacker can cause a targeted L1 Kernel-based Virtual Machine (KVM) guest to exit and gain elevated privileges on the targeted L1 system, which could be used to conduct further attacks.
Remediation
Install update from vendor's website.