PT-2026-67669 · Linux · Linux

CVE-2026-64562 · Published 2026-08-04 · Updated 2026-08-04

NVD

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.

Related Identifiers

CVE-2026-64562

Affected Products

Linux

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-64562 · Security Note
• https://git.kernel.org/stable/c/589419470030a89f16cf19300658b6dc644ca946 · Note
• https://git.kernel.org/stable/c/1dabef6e206568bf9d9ade74f6e56a48ea35695d · Note
• https://git.kernel.org/stable/c/8001d2ce9d9bd09118ce523aef595aa094573ae3 · Note
• https://git.kernel.org/stable/c/af56298e9d86e6098cd1d2e155cb2949b7c45412 · Note
• https://git.kernel.org/stable/c/622ebfac01ba4f9c0060cebd41257fe46fc4a0b3 · Note