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CVE-2026-64562

HIGHCVSS 8.8/10EPSS 0.16%

Last modified

CVE-2026-64562 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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.. EPSS estimates a 0.16% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
8.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS Probability
0.16%

5.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5, < b82c3144d8264265448292ca406f60bafeba3b6f; >= 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5, < 4f50e6aec16f69627dbad5704d1e90a255d766a7; >= 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5, < dc3eecfa219ebc9d01eaf7d1abd1441efe884dab; >= 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5, < af56298e9d86e6098cd1d2e155cb2949b7c45412; >= 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5, < 589419470030a89f16cf19300658b6dc644ca946; >= 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5, < 8001d2ce9d9bd09118ce523aef595aa094573ae3; >= 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5, < 1dabef6e206568bf9d9ade74f6e56a48ea35695d; >= 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5, < 622ebfac01ba4f9c0060cebd41257fe46fc4a0b3
LinuxLinux4.9

References

Timeline

Published
Last Modified
Status
Awaiting Analysis

Frequently Asked Questions

What is CVE-2026-64562?
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.
How severe is CVE-2026-64562?
CVE-2026-64562 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.16% probability of exploitation in the next 30 days.
How do I fix CVE-2026-64562?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST