MediumCVE-2025-23136

    Linux Kernel: NULL Pointer Dereference (CVE-2025-23136)

    Published Last modified Sources: Siemens ProductCERT, Debian LTS, SUSE, Debian, BSI, CVE.org, Msrc Update Guide, EUVD

    What is affected, what to do

    In the Linux kernel, the following vulnerability has been resolved: thermal: int340x: Add NULL check for adev Not all devices have an ACPI companion fwnode, so adev might be NULL. This is similar to the commit cd2fd6eab480 ("platform/x86: int3472: Check for adev == NULL").

    Update Linux Kernel to version 5.4.292, Linux Kernel to version 5.10.236, Linux Kernel to version 5.15.180.

    Affected
    • Linux Kernel lt 3.18..5.4.292
    • Linux Kernel lt 5.5..5.10.236
    • Linux Kernel lt 5.11..5.15.180
    • Linux Kernel lt 5.16..6.1.134
    • Linux Kernel lt 6.2..6.6.87
    • Linux Kernel lt 6.7..6.12.23
    • Linux Kernel lt 6.13..6.13.11
    • Linux Kernel lt 6.14..6.14.2
    Fixed in
    • Linux Kernel 5.4.292
    • Linux Kernel 5.10.236
    • Linux Kernel 5.15.180
    • Linux Kernel 6.1.134
    • Linux Kernel 6.6.87
    • Linux Kernel 6.12.23
    • Linux Kernel 6.13.11
    • Linux Kernel 6.14.2
    • Linux Kernel 6.15

    Not sure whether and how you are affected? Ask a question about this vulnerability

    Metrics

    5.5

    Priority

    XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.

    Source: NVD, CVSS v3

    5.5

    CVSS v3

    Severity Medium on the scale from 0 to 10.

    Source: Siemens ProductCERT, Debian LTS, SUSE, Debian, BSI, CVE.org, Msrc Update Guide, EUVD

    0.2 %

    EPSS score

    Low — model estimates < 1% exploitation likelihood.

    Source: FIRST EPSS, percentile 13.0

    Show all metrics
    Severity
    Medium
    Priority (0–325)

    The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first?

    Read in glossary
    37.42 Methodology
    Exploit maturity

    An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack.

    Read in glossary
    no public PoC known
    XIEM Effective CVSS

    XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command.

    Read in glossary
    5.5 Methodology
    CVSS v3

    CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions.

    Read in glossary
    5.5
    EPSS score

    The EPSS score is the absolute model output for an individual vulnerability: the estimated probability of real-world exploitation within the next 30 days, expressed as a value between 0 and 1 (i.e. 0 % to 100 %). A score of 0.42 means „the model estimates a 42 % chance of real-world exploitation within 30 days“.

    Read in glossary
    0.2 %
    Low — model estimates < 1% exploitation likelihood.
    EPSS percentile

    The EPSS percentile is the relative position of a vulnerability within all EPSS-scored CVEs, expressed as a value between 0 and 1. A percentile of 0.90 means „this CVE has a higher EPSS score than 90 % of all other scored CVEs“. Unlike the EPSS score, it is not a probability — but a positioning within a ranking.

    Read in glossary
    13.0
    Elevated — this CVE ranks above at least 10% of all CVEs scored today.
    KEV status

    The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching.

    Read in glossary
    —
    Published
    CISA assessment (SSVC)
    Exploitation: none known · not automatable · Technical impact: partial
    Source: CISA Vulnrichment, as of 1 October 2025
    CWE

    CWE is a catalogue of typical weakness types in software and hardware — such as flawed input validation, unsafe memory handling or poor authentication. Where a CVE names a concrete vulnerability in a concrete product, a CWE describes the underlying class of defect.

    Read in glossary
    CWE-476

    Detection rules

    No NEOSEC detection rule is available for this vulnerability yet.

    Classification under NIS2 and CRA

    Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.

    NIS2

    NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management.

    Read in glossary
    Handle the vulnerability in regular vulnerability handling under Art. 21(2)(e) NIS2.
    CRA

    The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates.

    Read in glossary
    From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
    ISO/IEC 27001

    ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security.

    Read in glossary
    Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.

    Description

    In the Linux kernel, the following vulnerability has been resolved: thermal: int340x: Add NULL check for adev Not all devices have an ACPI companion fwnode, so adev might be NULL. This is similar to the commit cd2fd6eab480 ("platform/x86: int3472: Check for adev == NULL"). Add a check for adev not being set and return -ENODEV in that case to avoid a possible NULL pointer deref in int3402_thermal_probe(). Note, under the same directory, int3400_thermal_probe() has such a check. [ rjw: Subject edit, added Fixes: ]

    Source: siemens_advisory, Debian LTS Advisories, suse_csaf, Debian Security Advisories, BSI WID Portal, BSI CSAF, NVD (NIST), Microsoft Security Update Guide, CVE.org (MITRE), ENISA EUVD, cvelistv5

    Affected products

    The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

    Affected products
    Affected versionsFixed in
    LinuxLinux
    • —
    • 6.7 – < 6.12.23
    • 5.5 – < 5.10.236
    • 5.16 – < 6.1.134
    • 6.2 – < 6.6.87
    • 6.13 – < 6.13.11
    • 3.18 – < 5.4.292
    • 6.14 – < 6.14.2
    • 5.11 – < 5.15.180
    • 6.15
    • 6.12.23
    • 5.10.236
    • 6.1.134
    • 6.6.87
    • 6.13.11
    • 5.4.292
    • 6.14.2
    • 5.15.180
    DellPowerProtect Data Domain OS
    • < 8.3.1.20
    • < 8.3.1.30
    • < 8.7.0.1
    • < 7.13.1.60
    • < 7.13.1.70
    • < 8.6.0.0
    • < 8.7.0.0
    • 8.3.1.20
    • 8.3.1.30
    • 8.7.0.1
    • 7.13.1.60
    • 7.13.1.70
    • 8.6.0.0
    • 8.7.0.0

    Vendors and products

    Affected operating systems

    Affected operating systems
    Linuxdebianlinuxbookworm
    Linuxdebianlinuxbullseye
    Linuxdebianlinux-6.1bullseye
    Linuxlinuxlinux_kernel—

    Weakness classes (CWE)

    • CWE-476NULL Pointer Dereference

      Base

      The product dereferences a pointer that it expects to be valid but is NULL.

      Entry at MITRE CWE-476

    References & sources

    Changes to this CVE

    Who changed this CVE and when: NVD (analysis, affected products, CVSS), the CVE publisher (CNA) and additional providers such as CISA (ADP).

    1. Record modifiedLinux

      Show 27 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Referenceadded
      —
      https://git.kernel.org/stable/c/0c49f12c77b77a706fd41370c11910635e491845
      Referenceadded
      —
      https://git.kernel.org/stable/c/2542a3f70e563a9e70e7ded314286535a3321bdb
      Referenceadded
      —
      https://git.kernel.org/stable/c/3155d5261b518776d1b807d9d922669991bbee56
      Referenceadded
      —
      https://git.kernel.org/stable/c/6a810c462f099353e908c70619638884cb82229c
      Referenceadded
      —
      https://git.kernel.org/stable/c/8e8f1ddf4186731649df8bc9646017369eb19186
      Referenceadded
      —
      https://git.kernel.org/stable/c/953d28a4f459fcbde2d08f51aeca19d6b0f179f3
      Referenceadded
      —
      https://git.kernel.org/stable/c/ac2eb7378319e3836cdf3a2c15a0bdf04c50e81d
      Referenceadded
      —
      https://git.kernel.org/stable/c/bc7b5f782d28942dbdfda70df30ce132694a06de
      Referenceadded
      —
      https://git.kernel.org/stable/c/d0d21c8e44216fa9afdb3809edf213f3c0a8c060
      Referenceremoved
      https://git.kernel.org/stable/c/0c49f12c77b77a706fd41370c11910635e491845
      —
      Referenceremoved
      https://git.kernel.org/stable/c/2542a3f70e563a9e70e7ded314286535a3321bdb
      —
      Referenceremoved
      https://git.kernel.org/stable/c/3155d5261b518776d1b807d9d922669991bbee56
      —
      Referenceremoved
      https://git.kernel.org/stable/c/6a810c462f099353e908c70619638884cb82229c
      —
      Referenceremoved
      https://git.kernel.org/stable/c/8e8f1ddf4186731649df8bc9646017369eb19186
      —
      Referenceremoved
      https://git.kernel.org/stable/c/953d28a4f459fcbde2d08f51aeca19d6b0f179f3
      —
      Referenceremoved
      https://git.kernel.org/stable/c/ac2eb7378319e3836cdf3a2c15a0bdf04c50e81d
      —
      Referenceremoved
      https://git.kernel.org/stable/c/bc7b5f782d28942dbdfda70df30ce132694a06de
      —
      Referenceremoved
      https://git.kernel.org/stable/c/d0d21c8e44216fa9afdb3809edf213f3c0a8c060
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/0c49f12c77b77a706fd41370c11910635e491845 Types: Patch
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/2542a3f70e563a9e70e7ded314286535a3321bdb Types: Patch
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/3155d5261b518776d1b807d9d922669991bbee56 Types: Patch
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/6a810c462f099353e908c70619638884cb82229c Types: Patch
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/8e8f1ddf4186731649df8bc9646017369eb19186 Types: Patch
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/953d28a4f459fcbde2d08f51aeca19d6b0f179f3 Types: Patch
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/ac2eb7378319e3836cdf3a2c15a0bdf04c50e81d Types: Patch
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/bc7b5f782d28942dbdfda70df30ce132694a06de Types: Patch
      —
      Reference typeremoved
      https://git.kernel.org/stable/c/d0d21c8e44216fa9afdb3809edf213f3c0a8c060 Types: Patch
      —

      Source identifier: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    2. Record modifiedCVE Program

      Show 4 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Referenceadded
      —
      https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
      Referenceadded
      —
      https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
      Referenceremoved
      https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
      —
      Referenceremoved
      https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
      —

      Source identifier: af854a3a-2127-422b-91ae-364da2661108

    3. Record modifiedSiemens ADP

      Show 4 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Affected versions (publisher)added
      —
      Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2025/23xxx/CVE-2025-23136.json">CVE-2025-23136</a>
      Referenceadded
      —
      https://cert-portal.siemens.com/productcert/html/ssa-019113.html
      Referenceadded
      —
      https://cert-portal.siemens.com/productcert/html/ssa-457936.html
      Referenceremoved
      https://cert-portal.siemens.com/productcert/html/ssa-019113.html
      —

      Source identifier: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e

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