CVE-2026-64562
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.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
No affected-product ranges reported in collected sources.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 8.8 high |
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H | NVD: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://git.kernel.org/stable/c/1dabef6e206568bf9d9ade74f6e56a48ea35695d416baaa9-dc9f-4396-8d5f-8c081fb06d67
- https://git.kernel.org/stable/c/4f50e6aec16f69627dbad5704d1e90a255d766a7416baaa9-dc9f-4396-8d5f-8c081fb06d67
- https://git.kernel.org/stable/c/589419470030a89f16cf19300658b6dc644ca946416baaa9-dc9f-4396-8d5f-8c081fb06d67
- https://git.kernel.org/stable/c/622ebfac01ba4f9c0060cebd41257fe46fc4a0b3416baaa9-dc9f-4396-8d5f-8c081fb06d67
- https://git.kernel.org/stable/c/8001d2ce9d9bd09118ce523aef595aa094573ae3416baaa9-dc9f-4396-8d5f-8c081fb06d67
- https://git.kernel.org/stable/c/af56298e9d86e6098cd1d2e155cb2949b7c45412416baaa9-dc9f-4396-8d5f-8c081fb06d67
- https://git.kernel.org/stable/c/b82c3144d8264265448292ca406f60bafeba3b6f416baaa9-dc9f-4396-8d5f-8c081fb06d67
- https://git.kernel.org/stable/c/dc3eecfa219ebc9d01eaf7d1abd1441efe884dab416baaa9-dc9f-4396-8d5f-8c081fb06d67
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