SB20260816206 - Use-after-free in Linux kernel x86 kvm
Published: August 16, 2026
Security Bulletin ID
SB20260816206
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) Use-after-free (CVE-ID: CVE-2026-74517)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 6.8 [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]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to use-after-free in KVM x86 I/O APIC delayed EOI handling when processing delayed EOI work during VM destruction after vCPUs have been destroyed. A local user can trigger VM teardown while delayed EOI work is still pending to cause a denial of service.
The issue occurs in the KVM x86 virtualization subsystem during the pre-VM-destroy sequence.
Remediation
Install update from vendor's website.