CVE-2025-37972

Kernel crash via absent PMIC button register

Published May 20, 2025 · Updated Sep 8, 2026

NULL pointer dereference in Linux 6.0 through affected stable-branch releases allows local users to crash the kernel during driver probe. In mtk_pmic_keys_probe, a button omitted from the device tree leaves regs unset, yet the function dereferences regs while assigning the key register. Reachability requires MediaTek PMIC-key hardware with a floating button whose node is removed; the failure interrupts availability during device initialization.

CVSS severity5.5
Medium
EPSS probability0.18%
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 6.0 through affected stable-branch releases allows local users to crash the kernel during driver probe. In mtk_pmic_keys_probe, a button omitted from the device tree leaves regs unset, yet the function dereferences regs while assigning the key register. Reachability requires MediaTek PMIC-key hardware with a floating button whose node is removed; the failure interrupts availability during device initialization.

The record

CVE
CVE-2025-37972
Published
May 20, 2025
Updated
Sep 8, 2026
Vendor
Siemens
Product
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP
Classifications
CWE-20, CWE-476
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 20, 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=6.0; version=b581acb49aec5c3b0af9ab1c537fb73481b79069 <09429ddb5a91e9e8f72cd18c012ec4171c2f85ec; version=b581acb49aec5c3b0af9ab1c537fb73481b79069 <11cdb506d0fbf5ac05bf55f5afcb3a215c316490; version=b581acb49aec5c3b0af9ab1c537fb73481b79069 <334d74a798463ceec02a41eb0e2354aaac0d6249; version=b581acb49aec5c3b0af9ab1c537fb73481b79069 <619c05fb176c272ac6cecf723446b39723ee6d97; version=b581acb49aec5c3b0af9ab1c537fb73481b79069 <90fa6015ff83ef1c373cc61b7c924ab2bcbe1801
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
5.5NIST 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-20Improper Input Validation
CWE-476NULL Pointer Dereference

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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