Vulnerability 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
- https://git.kernel.org/stable/c/674a3244f07f323f21a106a7bdcaebb6db6a5058
- https://git.kernel.org/stable/c/ae190f2439ca30067927077bf570d4c5edf07a0f
- https://git.kernel.org/stable/c/bbec4adc2f340d85f4a77a9ddcddaa6b1f4639c5
FAQ
What is CVE-2026-89931?
CVE-2026-89931 is a documented vulnerability. 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 ...
How severe is CVE-2026-89931?
CVSS scoring is not yet available for CVE-2026-89931. Check NVD for updates.
Is there a patch for CVE-2026-89931?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.