CVE-2023-53472 - CVE House
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Status published Unknown CVE-2023-53472

pwm: lpc32xx: Remove handling of PWM channels

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: pwm: lpc32xx: Remove handling of PWM channels Because LPC32xx PWM controllers have only a single output which is registered as the only PWM device/channel per controller, it is known in advance that pwm->hwpwm value is always 0. On basis of this fact simplify the code by removing operations with pwm->hwpwm, there is no controls which require channel number as input. Even though I wasn't aware at the time when I forward ported that patch, this fixes a null pointer dereference as lpc32xx->chip.pwms is NULL before devm_pwmchip_add() is called.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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Affected Vendor

Affected Software

Linux
Vulnerable Versions:
bb4de81eb940e7027f37a6fd3b7ddcb4403deb56, 4459118977665f681017e1299933895d54b6e87b, 81e6b51709da162b94e40a445bb60856406beaa1, 322b70b522abe03cd59712bb47a72eddd835d19d, 3d2813fb17e5fd0d73c1d1442ca0192bde4af10e, 7fc2172ad4e701d3c6e7dcb7b2efd8df71d2417b, 1c90a357cef4219cb436e59cc7463888103e104b, 4.14.248, 4.19.208, 5.4.149, 5.10.69, 4.9.284, 5.14.8, 5.15, 0, 4.14.326, 4.19.295, 5.4.257, 5.10.195, 5.15.132, 6.1.54, 6.5.4, 6.6

Timeline

Official Publish: October 1st, 2025
Last Modified: May 23rd, 2026
Added to House: July 22nd, 2026

CVSS Vectors

No vector data available

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.