CVE-2026-64172

A flaw was found in the Linux kernel's Kernel-based Virtual Machine (KVM) subsystem, specifically affecting Hygon Family 18h processors. Due to an erratum, the hardware may incorrectly read a stale status bit during interrupt processing, preventing the virtual machine from exiting as expected. This issue can cause KVM to miss critical wakeup signals for virtual CPUs, leading to guest virtual machines becoming unresponsive and experiencing unbounded delays, effectively resulting in a denial of service.

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 for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.