Kazuki Takiguchi

**Name of the Vulnerable Software and Affected Versions** Linux kernel versions through 6.1-rc6 **Description** A race condition in the x86 KVM subsystem allows guest OS users to cause a denial of service, resulting in a host OS crash or host OS memory corruption when nested virtualisation and the TDP MMU are enabled. **Recommendations** For Linux kernel versions through 6.1-rc6, as a temporary workaround, consider disabling nested virtualisation and the TDP MMU to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.