CVE-2025-22084

Local denial of service via premature serdev activation

Published Apr 16, 2025 · Updated May 11, 2026

NULL pointer dereference in the Linux kernel w1 UART driver allows local users to crash the system during device probing. The w1_uart_probe() function opens the serdev port before installing client operations, so receive_buf dereferences a null serdev->ops pointer while the port is active. Reaching the crash requires local low-privileged access and a system using the w1 UART serdev driver; no confidentiality or integrity impact is reported.

CVSS severity5.5
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the Linux kernel w1 UART driver allows local users to crash the system during device probing. The w1_uart_probe() function opens the serdev port before installing client operations, so receive_buf dereferences a null serdev->ops pointer while the port is active. Reaching the crash requires local low-privileged access and a system using the w1 UART serdev driver; no confidentiality or integrity impact is reported.

The record

CVE
CVE-2025-22084
Published
Apr 16, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 16, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record 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=6.9
  2. Affected versionversion=a3c08804364e80328a9ffdac59bb26676b938195 <0dd6770a72f138dabea9eae87f3da6ffa68f0d06
  3. Affected versionversion=a3c08804364e80328a9ffdac59bb26676b938195 <4f750b84628080ff0d67bf1af67a4967b740acf2
  4. Affected versionversion=a3c08804364e80328a9ffdac59bb26676b938195 <64ab50577c59bb7049bec6b5c42d1c38e4029f29
  5. Affected versionversion=a3c08804364e80328a9ffdac59bb26676b938195 <cc6b0ec7cccbf66ef3621e9e93296b7bd1f52298

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.9; version=a3c08804364e80328a9ffdac59bb26676b938195 <0dd6770a72f138dabea9eae87f3da6ffa68f0d06; version=a3c08804364e80328a9ffdac59bb26676b938195 <4f750b84628080ff0d67bf1af67a4967b740acf2; version=a3c08804364e80328a9ffdac59bb26676b938195 <64ab50577c59bb7049bec6b5c42d1c38e4029f29; version=a3c08804364e80328a9ffdac59bb26676b938195 <cc6b0ec7cccbf66ef3621e9e93296b7bd1f52298

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-476NULL Pointer Dereference
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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