Riskcovery

CVE-2023-53472

pwm: lpc32xx: Remove handling of PWM channels

State
Published
Severity
Not scored
Published
Oct 1, 2025
Updated
May 23, 2026
Reserved
Oct 1, 2025

Read the record on cve.org

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • bb4de81eb940e7027f37a6fd3b7ddcb4403deb56 to before abd9b2ee4047ccd980decbf26d61f9637604b1d5Affected
  • 4459118977665f681017e1299933895d54b6e87b to before a9a505f5b39d8fff1a55963a5e524c84639e98b2Affected
  • 81e6b51709da162b94e40a445bb60856406beaa1 to before 04301da4d87067a989f70ee56942bf9d97cd2a45Affected
  • 322b70b522abe03cd59712bb47a72eddd835d19d to before a2d9d884e84bfd37892219b1f55847f36d8e9901Affected
  • 3d2813fb17e5fd0d73c1d1442ca0192bde4af10e to before 5e22217c11424ef958ba28d03ff7167b4d7a8914Affected
  • 3d2813fb17e5fd0d73c1d1442ca0192bde4af10e to before 523f6268e86552a048975749251184c4e9a4b38fAffected
  • 3d2813fb17e5fd0d73c1d1442ca0192bde4af10e to before e3a0ddbaf7f1f9ffc070718b417461ced3268758Affected
  • 3d2813fb17e5fd0d73c1d1442ca0192bde4af10e to before 4aae44f65827f0213a7361cf9c32cfe06114473fAffected
  • 7fc2172ad4e701d3c6e7dcb7b2efd8df71d2417bAffected
  • 1c90a357cef4219cb436e59cc7463888103e104bAffected
  • 4.14.248 to before 4.14.326Affected
  • 4.19.208 to before 4.19.295Affected
  • 5.4.149 to before 5.4.257Affected
  • 5.10.69 to before 5.10.195Affected
  • 4.9.284 to before 4.10Affected
  • 5.14.8 to before 5.15Affected
LinuxLinux
  • 5.15Affected
  • before 5.15Not affected
  • 4.14.326 through 4.14.*Not affected
  • 4.19.295 through 4.19.*Not affected
  • 5.4.257 through 5.4.*Not affected
  • 5.10.195 through 5.10.*Not affected
  • 5.15.132 through 5.15.*Not affected
  • 6.1.54 through 6.1.*Not affected
  • 6.5.4 through 6.5.*Not affected
  • 6.6 and laterNot affected

References

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