CVE-2026-98472
kernel: KVM: SEV: Free have_run_cpus during VM destruction even if VM is no longer SEV
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 18, 2026
Updated · October 20, 2026
Description
A flaw was found in the Linux kernel's KVM (Kernel-based Virtual Machine) AMD SEV (Secure Encrypted Virtualization) implementation. This flaw allows a local user with permissions to manage virtual machines to cause a denial of service (DoS) through memory exhaustion. When an SEV guest is destroyed after undergoing an intra-host migration, the kernel fails to release allocated CPU tracking memory, resulting in an unrecoverable memory leak each time a migrated guest is terminated.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 3.3CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
CWE-772 · Missing Release of Resource after Effective Lifetime