KVM: x86: Load DR6 with guest value only before entering .vcpu_run() loop

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Astra Linux – vulnerability in linux-6.1, linux-6.12

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Load DR6 with guest value only before entering .vcpurun loop Move the conditional loading of hardware DR6 with the guest’s DR6 value out of the core .vcpurun loop to fix a bug where KVM can load hardware with a stale...

Linux Kernel Security Vulnerabilities

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. Linux kernel has a security vulnerability that stems from DR6 being loaded only before entering the .vcpurun loop...

PT-2025-10071

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A bug in the Linux kernel's KVM Kernel-based Virtual Machine implementation allows the guest's DR6 value to be clobbered when the guest modifies DR6 and then a fastpath VM-Exit occurs...