CVE-2022-50224

Host denial of service via NPT NX validation

Published Jun 18, 2025 · Updated May 23, 2026

Denial of service in Linux KVM allows local users to destabilize or crash a host by triggering an AMD NPT guest page fault. In make_spte, the reserved-SPTE-bit mask omits NX for nested page tables even though the NX huge-page mitigation sets that bit, causing the kernel WARN path to reject a valid entry. When AMD SVM uses NPT with the mitigation enabled, low-privileged local access is sufficient; the documented consequence is host instability or a crash, not data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Denial of service in Linux KVM allows local users to destabilize or crash a host by triggering an AMD NPT guest page fault. In make_spte, the reserved-SPTE-bit mask omits NX for nested page tables even though the NX huge-page mitigation sets that bit, causing the kernel WARN path to reject a valid entry. When AMD SVM uses NPT with the mitigation enabled, low-privileged local access is sufficient; the documented consequence is host instability or a crash, not data disclosure or modification.

The record

CVE
CVE-2022-50224
Published
Jun 18, 2025
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-480, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 2025CVE publishedPublication date reported by the CVE source.
  2. May 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.14.154 <4.15
  2. Affected versionversion=4.19.84 <4.20
  3. Affected versionversion=4.9.202 <4.10
  4. Affected versionversion=5219505fcbb640e273a0d51c19c38de0100ec5a9
  5. Affected versionversion=5.3.11 <5.4
  6. Affected versionversion=5.4
  7. Affected versionversion=78ffa84f00ff6b19f00c0e6dfe1870aba0db4025
  8. Affected versionversion=a7ad7943b84fae87f5be18f05025c51ae103f732
  9. Affected versionversion=b8e8c8303ff28c61046a4d0f6ea99aea609a7dc0 <6271f2854b9233702e236e576b885a876dde4889
  10. Affected versionversion=b8e8c8303ff28c61046a4d0f6ea99aea609a7dc0 <6c6ab524cfae0799e55c82b2c1d61f1af0156f8d
  11. Affected versionversion=bb16a6ba5d1ed79b40caea8d924e237f63205b7c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.14.154 <4.15; version=4.19.84 <4.20; version=4.9.202 <4.10; version=5219505fcbb640e273a0d51c19c38de0100ec5a9; version=5.3.11 <5.4; version=5.4; version=78ffa84f00ff6b19f00c0e6dfe1870aba0db4025; version=a7ad7943b84fae87f5be18f05025c51ae103f732; version=b8e8c8303ff28c61046a4d0f6ea99aea609a7dc0 <6271f2854b9233702e236e576b885a876dde4889; version=b8e8c8303ff28c61046a4d0f6ea99aea609a7dc0 <6c6ab524cfae0799e55c82b2c1d61f1af0156f8d; version=bb16a6ba5d1ed79b40caea8d924e237f63205b7c

Published CVSS scores

5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5CanonicalCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.0Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-480Use of Incorrect Operator
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo