CVE-2025-40262

System crash via stack-address cleanup registration

Published Dec 4, 2025 · Updated Aug 5, 2026

Memory corruption in affected Linux kernels and RUGGEDCOM RST2428P before V4.0 allows local users to crash the system during teardown. During probe, devm_add_action_or_reset() registers &priv, a stack address, rather than the persistent priv pointer that imx_sc_key_action() later dereferences during cleanup. Reachability requires the i.MX System Controller key driver on applicable hardware and a local teardown path such as module unload or driver unbind.

CVSS severity7.8
High
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in affected Linux kernels and RUGGEDCOM RST2428P before V4.0 allows local users to crash the system during teardown. During probe, devm_add_action_or_reset() registers &priv, a stack address, rather than the persistent priv pointer that imx_sc_key_action() later dereferences during cleanup. Reachability requires the i.MX System Controller key driver on applicable hardware and a local teardown path such as module unload or driver unbind.

The record

CVE
CVE-2025-40262
Published
Dec 4, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-20, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 4, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=5.8
  2. Affected versionversion=768062fd1284529212daffd360314e9aa93abb62 <3e96803b169dc948847f0fc2bae729a80914eb7b
  3. Affected versionversion=768062fd1284529212daffd360314e9aa93abb62 <4ce5218b101205b3425099fe3df88a61b58f9cc2
  4. Affected versionversion=768062fd1284529212daffd360314e9aa93abb62 <56881294915a6e866d31a46f9bcb5e19167cfbaa
  5. Affected versionversion=768062fd1284529212daffd360314e9aa93abb62 <6524a15d33951b18ac408ebbcb9c16e14e21c336
  6. Affected versionversion=768062fd1284529212daffd360314e9aa93abb62 <a155292c3ce722036014da5477ee0e4c87b5e6b3
  7. Affected versionversion=768062fd1284529212daffd360314e9aa93abb62 <ca9a08de9b294422376f47ade323d69590dbc6f2
  8. Affected versionversion=768062fd1284529212daffd360314e9aa93abb62 <d83f1512758f4ef6fc5e83219fe7eeeb6b428ea4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.8; version=768062fd1284529212daffd360314e9aa93abb62 <3e96803b169dc948847f0fc2bae729a80914eb7b; version=768062fd1284529212daffd360314e9aa93abb62 <4ce5218b101205b3425099fe3df88a61b58f9cc2; version=768062fd1284529212daffd360314e9aa93abb62 <56881294915a6e866d31a46f9bcb5e19167cfbaa; version=768062fd1284529212daffd360314e9aa93abb62 <6524a15d33951b18ac408ebbcb9c16e14e21c336; version=768062fd1284529212daffd360314e9aa93abb62 <a155292c3ce722036014da5477ee0e4c87b5e6b3; version=768062fd1284529212daffd360314e9aa93abb62 <ca9a08de9b294422376f47ade323d69590dbc6f2; version=768062fd1284529212daffd360314e9aa93abb62 <d83f1512758f4ef6fc5e83219fe7eeeb6b428ea4
Siemens · RUGGEDCOM RST2428Pversion=0 <V4.0

Published CVSS scores

5.5Siemens ProductCERTCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8Linux kernel CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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
T1068Exploitation for Privilege Escalation

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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