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CVE-2026-64562

KVM: nVMX: Hide shadow VMCS right after VMCLEAR

HIGH
8.8
CVSS Score
Published: August 4, 2026 at 06:23 AM UTC
Updated: October 19, 2026 at 09:17 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH8.8
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
90%
355f4fb1405ec29d0fac49b4d41fcd78cbd455d54.9
Vendor states this is fixed in 1dabef6e206568bf9d9ade74f6e56a48ea35695d (fixed)
Vendor states this is fixed in 4f50e6aec16f69627dbad5704d1e90a255d766a7 (fixed)
Vendor states this is fixed in 589419470030a89f16cf19300658b6dc644ca946 (fixed)
Vendor states this is fixed in 622ebfac01ba4f9c0060cebd41257fe46fc4a0b3 (fixed)
Vendor states this is fixed in 8001d2ce9d9bd09118ce523aef595aa094573ae3 (fixed)
Vendor states this is fixed in af56298e9d86e6098cd1d2e155cb2949b7c45412 (fixed)
Vendor states this is fixed in b82c3144d8264265448292ca406f60bafeba3b6f (fixed)
Vendor states this is fixed in dc3eecfa219ebc9d01eaf7d1abd1441efe884dab (fixed)
Vendor states this is fixed in 4.9 (unaffected)
Vendor states this is fixed in 5.10.265 (unaffected)
Vendor states this is fixed in 5.15.216 (unaffected)
Vendor states this is fixed in 6.1.183 (unaffected)
Vendor states this is fixed in 6.12.101 (unaffected)
Vendor states this is fixed in 6.18.42 (unaffected)
Vendor states this is fixed in 6.6.148 (unaffected)
Vendor states this is fixed in 7.1.6 (unaffected)
Vendor states this is fixed in 7.2 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (8)

Source: cverecord
https://git.kernel.org/stable/c/af56298e9d86e6098cd1d2e155cb2949b7c45412
Source: cverecord
https://git.kernel.org/stable/c/589419470030a89f16cf19300658b6dc644ca946
Source: cverecord
https://git.kernel.org/stable/c/8001d2ce9d9bd09118ce523aef595aa094573ae3
Source: cverecord
https://git.kernel.org/stable/c/1dabef6e206568bf9d9ade74f6e56a48ea35695d
Source: cverecord
https://git.kernel.org/stable/c/622ebfac01ba4f9c0060cebd41257fe46fc4a0b3
Source: cverecord
https://git.kernel.org/stable/c/b82c3144d8264265448292ca406f60bafeba3b6f
Source: cverecord
https://git.kernel.org/stable/c/4f50e6aec16f69627dbad5704d1e90a255d766a7
Source: cverecord
https://git.kernel.org/stable/c/dc3eecfa219ebc9d01eaf7d1abd1441efe884dab

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHLinux
Vector?

Quick Info

StatusRECEIVED
CWE
CWE-416

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