CVE-2023-53472

Kernel crash via premature PWM array access

Published Oct 1, 2025 · Updated Oct 1, 2025

Null pointer dereference in the Linux LPC32xx PWM driver allows local users to crash the kernel through PWM device initialization. The probe path indexes chip.pwms before devm_pwmchip_add() initializes that pointer, although each LPC32xx controller exposes only channel zero. Exploitation requires the LPC32xx PWM driver and compatible controller context; the resulting NULL dereference interrupts the system.

CVSS severity5.5
Medium
EPSS probability0.16%
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 the Linux LPC32xx PWM driver allows local users to crash the kernel through PWM device initialization. The probe path indexes chip.pwms before devm_pwmchip_add() initializes that pointer, although each LPC32xx controller exposes only channel zero. Exploitation requires the LPC32xx PWM driver and compatible controller context; the resulting NULL dereference interrupts the system.

The record

CVE
CVE-2023-53472
Published
Oct 1, 2025
Updated
Oct 1, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 1, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 1, 2025Record 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=1c90a357cef4219cb436e59cc7463888103e104b
  2. Affected versionversion=322b70b522abe03cd59712bb47a72eddd835d19d <a2d9d884e84bfd37892219b1f55847f36d8e9901
  3. Affected versionversion=3d2813fb17e5fd0d73c1d1442ca0192bde4af10e <4aae44f65827f0213a7361cf9c32cfe06114473f
  4. Affected versionversion=3d2813fb17e5fd0d73c1d1442ca0192bde4af10e <523f6268e86552a048975749251184c4e9a4b38f
  5. Affected versionversion=3d2813fb17e5fd0d73c1d1442ca0192bde4af10e <5e22217c11424ef958ba28d03ff7167b4d7a8914
  6. Affected versionversion=3d2813fb17e5fd0d73c1d1442ca0192bde4af10e <e3a0ddbaf7f1f9ffc070718b417461ced3268758
  7. Affected versionversion=4459118977665f681017e1299933895d54b6e87b <a9a505f5b39d8fff1a55963a5e524c84639e98b2
  8. Affected versionversion=5.15
  9. Affected versionversion=7fc2172ad4e701d3c6e7dcb7b2efd8df71d2417b
  10. Affected versionversion=81e6b51709da162b94e40a445bb60856406beaa1 <04301da4d87067a989f70ee56942bf9d97cd2a45
  11. Affected versionversion=bb4de81eb940e7027f37a6fd3b7ddcb4403deb56 <abd9b2ee4047ccd980decbf26d61f9637604b1d5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1c90a357cef4219cb436e59cc7463888103e104b; version=322b70b522abe03cd59712bb47a72eddd835d19d <a2d9d884e84bfd37892219b1f55847f36d8e9901; version=3d2813fb17e5fd0d73c1d1442ca0192bde4af10e <4aae44f65827f0213a7361cf9c32cfe06114473f; version=3d2813fb17e5fd0d73c1d1442ca0192bde4af10e <523f6268e86552a048975749251184c4e9a4b38f; version=3d2813fb17e5fd0d73c1d1442ca0192bde4af10e <5e22217c11424ef958ba28d03ff7167b4d7a8914; version=3d2813fb17e5fd0d73c1d1442ca0192bde4af10e <e3a0ddbaf7f1f9ffc070718b417461ced3268758; version=4459118977665f681017e1299933895d54b6e87b <a9a505f5b39d8fff1a55963a5e524c84639e98b2; version=5.15; version=7fc2172ad4e701d3c6e7dcb7b2efd8df71d2417b; version=81e6b51709da162b94e40a445bb60856406beaa1 <04301da4d87067a989f70ee56942bf9d97cd2a45; version=bb4de81eb940e7027f37a6fd3b7ddcb4403deb56 <abd9b2ee4047ccd980decbf26d61f9637604b1d5

Published CVSS scores

5.5CanonicalCVSS: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

T1499Endpoint Denial of Service

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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