CVE-2026-64562
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/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5, < af56298e9d86e6098cd1d2e155cb2949b7c45412; >= 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5, < 589419470030a89f16cf19300658b6dc644ca946; >= 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5, < 8001d2ce9d9bd09118ce523aef595aa094573ae3; >= 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5, < 1dabef6e206568bf9d9ade74f6e56a48ea35695d; >= 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5, < 622ebfac01ba4f9c0060cebd41257fe46fc4a0b3 |
| Linux | Linux | 4.9 |
References
Timeline
- Published
- Last Modified
- Status
- Received
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