CVE-2022-1204

Local system crash via AX.25 teardown race

Published Aug 29, 2022 · Updated Aug 2, 2024

Use-after-free in Linux kernel AX.25 networking allows local users to crash the system through concurrent socket and device teardown. During ax25_dev_device_down(), AX.25 resources can be freed while ax25_bind(), ax25_connect(), ax25_release(), or related paths still dereference them without retaining valid references. Local access sufficient to emulate an AX.25 device and race bind, connect, close, and detach operations can trigger a kernel crash; no confidentiality or integrity impact is reported.

CVSS severity5.5
Medium
EPSS probability0.40%
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 AX.25 networking allows local users to crash the system through concurrent socket and device teardown. During ax25_dev_device_down(), AX.25 resources can be freed while ax25_bind(), ax25_connect(), ax25_release(), or related paths still dereference them without retaining valid references. Local access sufficient to emulate an AX.25 device and race bind, connect, close, and detach operations can trigger a kernel crash; no confidentiality or integrity impact is reported.

The record

CVE
CVE-2022-1204
Published
Aug 29, 2022
Updated
Aug 2, 2024
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 29, 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?

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  1. Affected versionversion=Not-Known.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=Not-Known.

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
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

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Your stack

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