CVE-2026-64562
8.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 < b82c3144d8264265448292ca406f60bafeba3b6f | affected |
| Linux | Linux | 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 < 4f50e6aec16f69627dbad5704d1e90a255d766a7 | affected |
| Linux | Linux | 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 < dc3eecfa219ebc9d01eaf7d1abd1441efe884dab | affected |
| Linux | Linux | 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 < af56298e9d86e6098cd1d2e155cb2949b7c45412 | affected |
| Linux | Linux | 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 < 589419470030a89f16cf19300658b6dc644ca946 | affected |
| Linux | Linux | 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 < 8001d2ce9d9bd09118ce523aef595aa094573ae3 | affected |
| Linux | Linux | 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 < 1dabef6e206568bf9d9ade74f6e56a48ea35695d | affected |
| Linux | Linux | 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 < 622ebfac01ba4f9c0060cebd41257fe46fc4a0b3 | affected |
| Linux | Linux | 4.9 | affected |
| Linux | Linux | 0 < 4.9 | unaffected |
| Linux | Linux | 5.10.265 <= 5.10.* | unaffected |
| Linux | Linux | 5.15.216 <= 5.15.* | unaffected |
| Linux | Linux | 6.1.183 <= 6.1.* | unaffected |
| Linux | Linux | 6.6.148 <= 6.6.* | unaffected |
| Linux | Linux | 6.12.101 <= 6.12.* | unaffected |
| Linux | Linux | 6.18.42 <= 6.18.* | unaffected |
| Linux | Linux | 7.1.6 <= 7.1.* | unaffected |
| Linux | Linux | 7.2 <= * | unaffected |
Weaknesses
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
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