The vulnerability of the vcpu_block() function in the arch/x86/kvm/x86.c module of the virtualization subsystem on the x86 architecture of the Linux operating system allows a hacker to cause a service failure.

The vulnerability of the vcpublock function in the arch/x86/kvm/x86.c module of the virtualization subsystem on the x86 architecture of the Linux operating system is related to incorrect checks for consistency in input data. Exploiting this vulnerability could allow an attacker to cause a service...

CVE-2026-43265: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Ignore -EBUSY when checking nested events from vcpublock Ignore -EBUSY when checking nested events after exiting a blocking state while L2 is active, as exiting to userspace will generate a spurious userspace exit,...