CVE Database›Document archive›CVE-2022-50224

CVE-2022-50224

kernel: Linux kernel KVM: Denial of Service via incorrect NX bit handling in NPT

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · June 18, 2025

Updated · June 30, 2026

Description

A flaw was found in the Linux kernel's Kernel-based Virtual Machine (KVM) component. When KVM uses Nested Page Tables (NPT) with NX huge page mitigation enabled, it incorrectly handles the No-Execute (NX) bit in Shadow Page Table Entries (SPTE). This improper handling can be triggered by a local attacker with low privileges, leading to a system warning. The consequence is a denial of service, as the system may become unstable or crash.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

CVSS / CWE

CVSS 3.1 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-480 · Use of Incorrect Operator