VULNERABILITY INTELLIGENCE
CVE-2026-64562
CVSS score8.8 HIGH
EPSS probability0.16%
CISA KEVNot currently listed
Published2026-08-04
Last modified2026-10-19
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
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.
Weakness classification
- 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-416