CVE-2022-41222

Local code execution via unlocked PUD move

Published Sep 21, 2022 · Updated May 28, 2025

Use-after-free in the Linux kernel before 5.13.3 allows local users to crash the system or execute arbitrary code through an mremap race. The optimized PUD-move path in mm/mremap.c omits the reverse-mapping write lock, letting an rmap walk miss a moved page-table entry and leave a stale TLB mapping to freed memory. Exploitation requires low-privileged local access and winning a high-complexity race; the bounded outcomes are a system crash or kernel-context code execution.

CVSS severity7.0
High
EPSS probability0.46%
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 the Linux kernel before 5.13.3 allows local users to crash the system or execute arbitrary code through an mremap race. The optimized PUD-move path in mm/mremap.c omits the reverse-mapping write lock, letting an rmap walk miss a moved page-table entry and leave a stale TLB mapping to freed memory. Exploitation requires low-privileged local access and winning a high-complexity race; the bounded outcomes are a system crash or kernel-context code execution.

The record

CVE
CVE-2022-41222
Published
Sep 21, 2022
Updated
May 28, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-416, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 21, 2022CVE publishedPublication date reported by the CVE source.
  2. May 28, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.0SUSECVSS: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.

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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-416Use After Free
T1068Exploitation for Privilege Escalation

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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