CVEvulnerability
CVE-2026-89931
- Status
- Received
- Published
- 2026-09-16
- Last modified
- 2026-10-19
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Description
In the Linux kernel, the following vulnerability has been resolved:
KVM: nVMX: Ensure KVM_REQ_GET_NESTED_STATE_PAGES is cleared on VM-Exit
Always check and clear KVM_REQ_GET_NESTED_STATE_PAGES when emulating a
nested VM-Exit to ensure the request is cleared, even when KVM was built
with CONFIG_KVM_HYPERV=n, as KVM subtly relies on the "check" to clear
the flag and thus avoid double-mapping the vmcs12 pages, e.g. if KVM
manages to bail from VM-Enter without processing the request, and then
emulates VMLAUNCH or VMRESUME.
References
- https://git.kernel.org/stable/c/11722439fb206c88e6f31be54173efa9880b4ccb git.kernel.org
- https://git.kernel.org/stable/c/674a3244f07f323f21a106a7bdcaebb6db6a5058 git.kernel.org
- https://git.kernel.org/stable/c/ae190f2439ca30067927077bf570d4c5edf07a0f git.kernel.org
- https://git.kernel.org/stable/c/bbec4adc2f340d85f4a77a9ddcddaa6b1f4639c5 git.kernel.org