CVE-2026-64562KVM: nVMX: Hide shadow VMCS right after VMCLEAR
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 before b82c3144d8264265448292ca406f60bafeba3b6f; 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 builds before 4f50e6aec16f69627dbad5704d1e90a255d766a7; from 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 before dc3eecfa219ebc9d01eaf7d1abd1441efe884dab; from 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 before af56298e9d86e6098cd1d2e155cb2949b7c45412; from 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 before 589419470030a89f16cf19300658b6dc644ca946; from 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 before 8001d2ce9d9bd09118ce523aef595aa094573ae3; 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 builds before 1dabef6e206568bf9d9ade74f6e56a48ea35695d; from 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 before 622ebfac01ba4f9c0060cebd41257fe46fc4a0b3 | CNA record |
References
- https://git.kernel.org/stable/c/b82c3144d8264265448292ca406f60bafeba3b6f
- https://git.kernel.org/stable/c/4f50e6aec16f69627dbad5704d1e90a255d766a7
- https://git.kernel.org/stable/c/dc3eecfa219ebc9d01eaf7d1abd1441efe884dab
- https://git.kernel.org/stable/c/af56298e9d86e6098cd1d2e155cb2949b7c45412
- https://git.kernel.org/stable/c/589419470030a89f16cf19300658b6dc644ca946
- https://git.kernel.org/stable/c/8001d2ce9d9bd09118ce523aef595aa094573ae3
- https://git.kernel.org/stable/c/1dabef6e206568bf9d9ade74f6e56a48ea35695d
- https://git.kernel.org/stable/c/622ebfac01ba4f9c0060cebd41257fe46fc4a0b3
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.