SB2026050939 - Improper Initialization in Linux kernel kvm vgic
Published: May 9, 2026
Security Bulletin ID
SB2026050939
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 Initialization (CVE-ID: CVE-2026-43351)
CWE-ID: CWE-665 - Improper Initialization
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 user to cause a denial of service.
The vulnerability exists due to improper initialization in the KVM arm64 vgic distributor/redistributor initialization logic when creating a virtual GIC device. A local user can trigger an error during vgic creation to cause a denial of service.
The issue occurs because teardown may access uninitialized rd_regions after an early failure in kvm_vgic_create().
Remediation
Install update from vendor's website.