SB2018100519 - Fedora 27 update for kernel, kernel-headers
Published: October 5, 2018 Updated: April 24, 2025
Security Bulletin ID
SB2018100519
CSH 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 vulnerability.
1) Improper input validation (CVE-ID: CVE-2018-18021)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local attacker to cause DoS condition on the target system.
The vulnerability exists in the arch/arm64/kvm/guest.c source code file due to the mishandling of the sanity check for the KVM_SET_ON_REG IOCTL function. A local attacker can create a malicious Kernel-based Virtual Machine (KVM), cause an illegal exception return and cause the system to crash.
Remediation
Install update from vendor's website.