CVE-2026-46131 Details
Description
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.
A vulnerability in the Linux kernel's KVM component for x86 architecture has been addressed. The issue arose in the handling of slow flush hypercalls, where the check for nested EPT/NPT was incorrectly based on the guest mode of the virtual CPU. This misalignment could lead to improper translation of nested guest physical addresses, potentially causing issues in memory management for virtual machines. The vulnerability affects the Linux kernel stable tree.
Users can upgrade to the latest version of the Linux kernel stable tree, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/45fc766bc756ff1d66f8ca026a9c4f7f764adfae | kernel.org | Patch |
| https://git.kernel.org/stable/c/464af6fc2b1dcc74005b7f58ee3812b17777efee | kernel.org | Patch |
| https://git.kernel.org/stable/c/4c7f8436b19a2a3acc0cb6b6e3becd6796ae5c57 | kernel.org | Patch |
| https://git.kernel.org/stable/c/971f17f5d91045404e3914029ea57c3da90179a4 | kernel.org | Patch |
| https://git.kernel.org/stable/c/d6f4e217d663ede5becc2fd6cb612c749677387b | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-noinfo | Insufficient Information to Classify Weakness | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 6.2, < 6.6.140 >= 6.7, < 6.12.88 >= 6.13, < 6.18.30 >= 6.19, < 7.0.7 7.1 rc1 7.1 rc2 |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 24, 2026 | Initial Analysis | [email protected] |
| Jun 17, 2026 | CVE Modified | kernel.org |
| May 28, 2026 | New CVE Received | kernel.org |