CVE-2026-89931

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxb4f69df0f65e97fec439130a0d0a8b9c7cc02df2 < ae190f2439ca30067927077bf570d4c5edf07a0faffected
LinuxLinuxb4f69df0f65e97fec439130a0d0a8b9c7cc02df2 < 674a3244f07f323f21a106a7bdcaebb6db6a5058affected
LinuxLinuxb4f69df0f65e97fec439130a0d0a8b9c7cc02df2 < bbec4adc2f340d85f4a77a9ddcddaa6b1f4639c5affected
LinuxLinuxb4f69df0f65e97fec439130a0d0a8b9c7cc02df2 < 11722439fb206c88e6f31be54173efa9880b4ccbaffected
LinuxLinux6.8affected
LinuxLinux0 < 6.8unaffected
LinuxLinux6.12.110 <= 6.12.*unaffected
LinuxLinux6.18.51 <= 6.18.*unaffected
LinuxLinux7.2.5 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References