SB20261022325 - Double free in Linux kernel kvm svm
Published: October 22, 2026
Security Bulletin ID
SB20261022325
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) Double free (CVE-ID: CVE-2026-98719)
CWE-ID: CWE-415 - Double 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 potentially cause a denial of service through kernel memory corruption.
The vulnerability exists due to a double free in the Linux kernel KVM SEV component when cleaning up after a failed SEV guest initialization and subsequently destroying the virtual machine. A local user can trigger this failure and destruction sequence to cause the have_run_cpus mask to be freed twice, potentially crashing the host kernel.
Remediation
Install update from vendor's website.