CVE-2026-64562

Description

In the Linux kernel, the following vulnerability has been resolved: KVM: nVMX: Hide shadow VMCS right after VMCLEAR free_nested() frees the shadow VMCS while vmcs01 still points to it. But because it is asynchronous with respect to loaded_vmcs_clear(), the vCPU might migrate before the pointer is cleared and __loaded_vmcs_clear() may then execute VMCLEAR. The VMCS needs to stay attached until its explicit VMCLEAR completes, but then it can be hidden and the page safely freed.

References

• https://git.kernel.org/stable/c/1dabef6e206568bf9d9ade74f6e56a48ea35695d
• https://git.kernel.org/stable/c/589419470030a89f16cf19300658b6dc644ca946
• https://git.kernel.org/stable/c/622ebfac01ba4f9c0060cebd41257fe46fc4a0b3
• https://git.kernel.org/stable/c/8001d2ce9d9bd09118ce523aef595aa094573ae3
• https://git.kernel.org/stable/c/af56298e9d86e6098cd1d2e155cb2949b7c45412