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CVE-2025-23131

MEDIUM 5.5 ALL-YEARS

Published 2025-04-16 · Last modified 2026-10-15 · Linux · NVD: Modified

In the Linux kernel, the following vulnerability has been resolved: dlm: prevent NPD when writing a positive value to event_done do_uevent returns the value written to event_done. In case it is a positive value, new_lockspace would undo all the work, and lockspace would not be set. __dlm_new_lockspace, however, would treat that positive value as a success due to commit 8511a2728ab8 ("dlm: fix use count with multiple joins"). Down the line, device_create_lockspace would pass that NULL lockspace to dlm_find_lockspace_local, leading to a NULL pointer dereference. Treating such positive values as successes prevents the problem. Given this has been broken for so long, this is unlikely to break userspace expectations.

LIMITED SIGNALS

No known exploitation, public exploit, or elevated probability at this time. Track for changes.

Exploitation likelihood

0.2%chance of exploitation in 30 days · 9th percentile

○ In CISA KEV○ Catalogued PoC

Impact if exploited

5.5CVSS 3.1 · MEDIUM · NVD

  • ConfidentialityNone
  • IntegrityNone
  • AvailabilityHigh

What an attacker needs

  • ⚠Access: Requires local access to the host
  • ⚠Privileges: Requires a low-privilege account
  • ✓User interaction: No user interaction needed
  • ✓Complexity: No special conditions — reliably repeatable

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

Search for new PoCs

Search GitHub now — results may be empty or unverified.

Tracked sources are checked weekly for the full archive, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Affected

Vendors Linux Siemens

Products Linux Simatic S7 1500 Tm Mfp Gnu/Linux Subsystem Linux Kernel

Weakness (CWE)

  • CWE-476: NULL pointer dereference

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References and research data (JSON)

Vendor product assessments

Showing 32 of 274 vendor product statements; 242 omitted. Read the full vendor advisory.

  • kernel as a component of Red Hat Enterprise Linux 6 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel

    • no fix planned: Out of support scope
    Red Hat · CVE-2025-23131 · Updated 2026-06-30T00:48:45+00:00
  • python-perf as a component of Red Hat Enterprise Linux 6 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/python-perf

    • no fix planned: Out of support scope
    Red Hat · CVE-2025-23131 · Updated 2026-06-30T00:48:45+00:00
  • kernel-rt-debug as a component of Red Hat Enterprise Linux 7 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-rt-debug

    • no fix planned: Out of support scope
    Red Hat · CVE-2025-23131 · Updated 2026-06-30T00:48:45+00:00
  • kernel.src as a component of Red Hat Enterprise Linux 7 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel?arch=src

    • no fix planned: Out of support scope
    Red Hat · CVE-2025-23131 · Updated 2026-06-30T00:48:45+00:00
  • kernel-debug-modules-internal as a component of Red Hat Enterprise Linux 8 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-debug-modules-internal

    • no fix planned: Out of support scope
    Red Hat · CVE-2025-23131 · Updated 2026-06-30T00:48:45+00:00
  • kernel-rt-debug-kvm as a component of Red Hat Enterprise Linux 8 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-rt-debug-kvm

    • no fix planned: Out of support scope
    Red Hat · CVE-2025-23131 · Updated 2026-06-30T00:48:45+00:00
  • kernel-tools-libs as a component of Red Hat Enterprise Linux 8 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-tools-libs

    • no fix planned: Out of support scope
    Red Hat · CVE-2025-23131 · Updated 2026-06-30T00:48:45+00:00
  • kernel-64k as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-64k

    • none available: Fix deferred
    Red Hat · CVE-2025-23131 · Updated 2026-06-30T00:48:45+00:00
  • kernel-64k-modules as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-64k-modules

    • none available: Fix deferred
    Red Hat · CVE-2025-23131 · Updated 2026-06-30T00:48:45+00:00
  • kernel-debug-modules-core as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-debug-modules-core

    • none available: Fix deferred
    Red Hat · CVE-2025-23131 · Updated 2026-06-30T00:48:45+00:00
  • kernel-modules-extra as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-modules-extra

    • none available: Fix deferred
    Red Hat · CVE-2025-23131 · Updated 2026-06-30T00:48:45+00:00
  • kernel-rt-64k-debug-modules-extra as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-rt-64k-debug-modules-extra

    • none available: Fix deferred
    Red Hat · CVE-2025-23131 · Updated 2026-06-30T00:48:45+00:00
  • kernel-rt-debug-devel as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-rt-debug-devel

    • none available: Fix deferred
    Red Hat · CVE-2025-23131 · Updated 2026-06-30T00:48:45+00:00
  • kernel-rt-modules-extra as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-rt-modules-extra

    • none available: Fix deferred
    Red Hat · CVE-2025-23131 · Updated 2026-06-30T00:48:45+00:00
  • kernel-zfcpdump-devel as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-zfcpdump-devel

    • none available: Fix deferred
    Red Hat · CVE-2025-23131 · Updated 2026-06-30T00:48:45+00:00
  • rv as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/rv

    • none available: Fix deferred
    Red Hat · CVE-2025-23131 · Updated 2026-06-30T00:48:45+00:00
  • kernel as a component of Red Hat Enterprise Linux 10 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel

    Red Hat · CVE-2025-23131 · Updated 2026-06-30T00:48:45+00:00
  • kernel-64k-debug-devel as a component of Red Hat Enterprise Linux 10 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-64k-debug-devel

    Red Hat · CVE-2025-23131 · Updated 2026-06-30T00:48:45+00:00
  • kernel-64k-devel as a component of Red Hat Enterprise Linux 10 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-64k-devel

    Red Hat · CVE-2025-23131 · Updated 2026-06-30T00:48:45+00:00
  • kernel-abi-stablelists as a component of Red Hat Enterprise Linux 10 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-abi-stablelists

    Red Hat · CVE-2025-23131 · Updated 2026-06-30T00:48:45+00:00
  • kernel-debug-devel-matched as a component of Red Hat Enterprise Linux 10 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-debug-devel-matched

    Red Hat · CVE-2025-23131 · Updated 2026-06-30T00:48:45+00:00
  • kernel-devel as a component of Red Hat Enterprise Linux 10 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-devel

    Red Hat · CVE-2025-23131 · Updated 2026-06-30T00:48:45+00:00
  • kernel-modules-extra as a component of Red Hat Enterprise Linux 10 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-modules-extra

    Red Hat · CVE-2025-23131 · Updated 2026-06-30T00:48:45+00:00
  • kernel-rt-64k-debug as a component of Red Hat Enterprise Linux 10 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-rt-64k-debug

    Red Hat · CVE-2025-23131 · Updated 2026-06-30T00:48:45+00:00
  • kernel-rt-64k-debug-modules-extra as a component of Red Hat Enterprise Linux 10 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-rt-64k-debug-modules-extra

    Red Hat · CVE-2025-23131 · Updated 2026-06-30T00:48:45+00:00
  • kernel-rt-core as a component of Red Hat Enterprise Linux 10 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-rt-core

    Red Hat · CVE-2025-23131 · Updated 2026-06-30T00:48:45+00:00
  • kernel-rt-debug-modules as a component of Red Hat Enterprise Linux 10 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-rt-debug-modules

    Red Hat · CVE-2025-23131 · Updated 2026-06-30T00:48:45+00:00
  • kernel-rt-modules as a component of Red Hat Enterprise Linux 10 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-rt-modules

    Red Hat · CVE-2025-23131 · Updated 2026-06-30T00:48:45+00:00
  • kernel-tools-libs-devel as a component of Red Hat Enterprise Linux 10 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-tools-libs-devel

    Red Hat · CVE-2025-23131 · Updated 2026-06-30T00:48:45+00:00
  • kernel-zfcpdump-devel as a component of Red Hat Enterprise Linux 10 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-zfcpdump-devel

    Red Hat · CVE-2025-23131 · Updated 2026-06-30T00:48:45+00:00
  • kernel.src as a component of Red Hat Enterprise Linux 10 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel?arch=src

    Red Hat · CVE-2025-23131 · Updated 2026-06-30T00:48:45+00:00
  • rv as a component of Red Hat Enterprise Linux 10 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/rv

    Red Hat · CVE-2025-23131 · Updated 2026-06-30T00:48:45+00:00

Known Affected Software Configurations

VendorProductVersion range
LinuxLinux Kernel≥ 2.6.31 and < 6.14.2

References

Patches & mitigations

Advisories

Technical & other

Sources: NVD · CVE.org · All sources and attribution · EPSS