CVE-2022-1205Public exploit

Local system crash via AX.25 timer race

Published Aug 31, 2022 · Updated Aug 2, 2024

Race condition in Linux Kernel through 5.17 allows local users to crash the system by simulating and detaching an AX.25 device. In net/ax25, ax25_kill_by_device and ax25_release can clear or free ax25_dev while heartbeat and protocol timers still dereference it. Exploitation requires local low-privileged access and winning the device-teardown race; the demonstrated consequence is a kernel crash.

CVSS severity4.7
Medium
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in Linux Kernel through 5.17 allows local users to crash the system by simulating and detaching an AX.25 device. In net/ax25, ax25_kill_by_device and ax25_release can clear or free ax25_dev while heartbeat and protocol timers still dereference it. Exploitation requires local low-privileged access and winning the device-teardown race; the demonstrated consequence is a kernel crash.

The record

CVE
CVE-2022-1205
Published
Aug 31, 2022
Updated
Aug 2, 2024
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-476, CWE-416, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 31, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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=Fixed in kernel v5.18-rc1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=Fixed in kernel v5.18-rc1

Published CVSS scores

4.7NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/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 exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
CWE-416Use After Free
T1499.004Application or System Exploitation

Public exploit references

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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