CVE-2025-23136

Local denial of service via missing ACPI companion

Published Apr 16, 2025 · Updated Sep 8, 2026

NULL pointer dereference in Linux 3.18 and later allows local users to crash affected systems during INT3402 device probing. int3402_thermal_probe dereferences adev without first handling devices whose firmware node has no ACPI companion. Exploitation requires low-privileged local access and applicable Intel thermal hardware; the resulting kernel fault interrupts service.

CVSS severity5.5
Medium
EPSS probability0.21%
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 Linux 3.18 and later allows local users to crash affected systems during INT3402 device probing. int3402_thermal_probe dereferences adev without first handling devices whose firmware node has no ACPI companion. Exploitation requires low-privileged local access and applicable Intel thermal hardware; the resulting kernel fault interrupts service.

The record

CVE
CVE-2025-23136
Published
Apr 16, 2025
Updated
Sep 8, 2026
Vendor
Siemens
Product
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 16, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 8, 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=V3.1.6 <*

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Siemens · SIPLUS S7-1500 CPU 1518-4 PN/DP MFPversion=V3.1.6 <*
The Linux Kernel Organization · Linuxversion=3.18; version=77e337c6e23e3b9d22e09ffec202a80f755a54c2 <0c49f12c77b77a706fd41370c11910635e491845; version=77e337c6e23e3b9d22e09ffec202a80f755a54c2 <2542a3f70e563a9e70e7ded314286535a3321bdb; version=77e337c6e23e3b9d22e09ffec202a80f755a54c2 <3155d5261b518776d1b807d9d922669991bbee56; version=77e337c6e23e3b9d22e09ffec202a80f755a54c2 <6a810c462f099353e908c70619638884cb82229c; version=77e337c6e23e3b9d22e09ffec202a80f755a54c2 <8e8f1ddf4186731649df8bc9646017369eb19186; version=77e337c6e23e3b9d22e09ffec202a80f755a54c2 <953d28a4f459fcbde2d08f51aeca19d6b0f179f3; version=77e337c6e23e3b9d22e09ffec202a80f755a54c2 <ac2eb7378319e3836cdf3a2c15a0bdf04c50e81d; version=77e337c6e23e3b9d22e09ffec202a80f755a54c2 <bc7b5f782d28942dbdfda70df30ce132694a06de; version=77e337c6e23e3b9d22e09ffec202a80f755a54c2 <d0d21c8e44216fa9afdb3809edf213f3c0a8c060
Siemens · SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPversion=V3.1.6 <*
Siemens · SIMATIC S7-1500 CPU 1518-4 PN/DP MFPversion=V3.1.6 <*

Published CVSS scores

5.5Siemens ProductCERTCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5OracleCVSS: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
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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