CVE-2026-46131
MediumCVSS 5.5Exploitation Probability (EPSS)
Low risk7th percentile - higher than 7% of all known CVEs
Summary
A vulnerability has been identified in the Linux kernel related to checking nEPT/nNPT in slow hypercall flushes. The issue lies in the incorrect checking of guest mode, which may lead to improper functioning of address translation features.
Risk Assessment
This vulnerability could lead to security issues in virtualized environments using nested EPT/NPT, potentially allowing unauthorized access to guest memory.
Recommendation
It is recommended to update the Linux kernel to the latest version to mitigate this vulnerability and ensure proper functioning of virtualization features.
Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: KVM: x86: check for nEPT/nNPT in slow flush hypercalls Checking is_guest_mode(vcpu) is incorrect, because translate_nested_gpa() is only valid if an L2 guest is running *with nested EPT/NPT enabled*. Instead use the same condition as translate_nested_gpa() itself.