CVE-2022-50224
kernel: Linux kernel KVM: Denial of Service via incorrect NX bit handling in NPT
Severity
ModerateRed Hat Product Security
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 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-480 · Use of Incorrect Operator