CVE-2022-3523

Kernel crash via unreferenced device-private fault page

Published Oct 16, 2022 · Updated Apr 15, 2025

Use-after-free in Linux kernel device-private memory handling allows local users with device access to crash the kernel. The fault path calls the page's migrate_to_ram() callback without holding a page reference, so concurrent migration can free both the page and its pgmap and invalidate the function pointer. Triggering requires device-private ZONE_DEVICE memory and a race involving device unbinding, module unloading, or closing a device descriptor before task exit; the documented consequence is a kernel crash.

CVSS severity5.3
Medium
EPSS probability0.92%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Linux kernel device-private memory handling allows local users with device access to crash the kernel. The fault path calls the page's migrate_to_ram() callback without holding a page reference, so concurrent migration can free both the page and its pgmap and invalidate the function pointer. Triggering requires device-private ZONE_DEVICE memory and a race involving device unbinding, module unloading, or closing a device descriptor before task exit; the documented consequence is a kernel crash.

The record

CVE
CVE-2022-3523
Published
Oct 16, 2022
Updated
Apr 15, 2025
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-119, CWE-416, T1499.004
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 16, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=n/a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linux Kernelversion=n/a

Published CVSS scores

5.3VulDBCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
6.4SUSECVSS:3.1/AV:L/AC:H/PR:H/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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-416Use After Free
T1499.004Application or System Exploitation

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

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Your stack

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