CVE-2022-44032

Kernel memory access via PCMCIA detach race

Published Oct 30, 2022 · Updated Aug 3, 2024

Use-after-free in the Linux kernel through 6.0.6 allows physically proximate attackers to access freed memory by racing PCMCIA removal with open(). The cm4000_cs driver's cmm_open() can retain a device pointer while cm4000_detach() frees the associated structure, leaving the acquired descriptor dangling. Exploitation requires physical PCMCIA access and precise timing; a subsequent read dereferences the freed kernel object.

CVSS severity6.4
Medium
EPSS probability0.33%
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 through 6.0.6 allows physically proximate attackers to access freed memory by racing PCMCIA removal with open(). The cm4000_cs driver's cmm_open() can retain a device pointer while cm4000_detach() frees the associated structure, leaving the acquired descriptor dangling. Exploitation requires physical PCMCIA access and precise timing; a subsequent read dereferences the freed kernel object.

The record

CVE
CVE-2022-44032
Published
Oct 30, 2022
Updated
Aug 3, 2024
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-362
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 30, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=0 <=6.0.6

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=0 <=6.0.6

Published CVSS scores

6.4NIST NVDCVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
6.4CISA-ADPCVSS:3.1/AV:P/AC:H/PR:N/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)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

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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