5.5

CVE-2023-53472: pwm: lpc32xx: Remove handling of PWM channels

Analyzed
AliasesUBUNTU-CVE-2023-53472DEBIAN-CVE-2023-53472
Published 01-10-2025Last modified 23-05-2026

Vulnerability summary

CVE-2023-53472 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.16% chance of exploitation in the next 30 days, higher than 5.1% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.16%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 14 · Related 14
SUSE-SU-2025:03600-1SUSE-SU-2025:03615-1SUSE-SU-2025:03628-1SUSE-SU-2025:03634-1SUSE-SU-2025:20851-1SUSE-SU-2025:20861-1

Timeline

  1. 01-10-2025
    PublishedVulnerability first disclosed.
  2. 23-05-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.16%

Chance of exploitation in the next 30 days

Percentile

5%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.16% on 06-10-2026

06-10-202605-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu122 products
  • linuxAll versions (No fix recorded) | < 5.4.0-169.187 | < 5.15.0-94.104
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.4.0-1116.126 | < 5.15.0-1053.58
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ bb4de81eb940e7027f37a6fd3b7ddcb4403deb56, < abd9b2ee4047ccd980decbf26d61f9637604b1d5 | ≥ 4459118977665f681017e1299933895d54b6e87b, < a9a505f5b39d8fff1a55963a5e524c84639e98b2 | ≥ 81e6b51709da162b94e40a445bb60856406beaa1, < 04301da4d87067a989f70ee56942bf9d97cd2a45 | ≥ 322b70b522abe03cd59712bb47a72eddd835d19d, < a2d9d884e84bfd37892219b1f55847f36d8e9901 | ≥ 3d2813fb17e5fd0d73c1d1442ca0192bde4af10e, < 5e22217c11424ef958ba28d03ff7167b4d7a8914 | ≥ 3d2813fb17e5fd0d73c1d1442ca0192bde4af10e, < 523f6268e86552a048975749251184c4e9a4b38f | ≥ 3d2813fb17e5fd0d73c1d1442ca0192bde4af10e, < e3a0ddbaf7f1f9ffc070718b417461ced3268758 | ≥ 3d2813fb17e5fd0d73c1d1442ca0192bde4af10e, < 4aae44f65827f0213a7361cf9c32cfe06114473f | 7fc2172ad4e701d3c6e7dcb7b2efd8df71d2417b | 1c90a357cef4219cb436e59cc7463888103e104b | ≥ 4.14.248, < 4.14.326 | ≥ 4.19.208, < 4.19.295 | ≥ 5.4.149, < 5.4.257 | ≥ 5.10.69, < 5.10.195 | ≥ 4.9.284, < 4.10 | ≥ 5.14.8, < 5.15 | 5.15
  • linux_kernel≥ 4.9.284, < 4.10 | ≥ 4.14.248, < 4.14.326 | ≥ 4.19.208, < 4.19.295 | ≥ 5.4.149, < 5.4.257 | ≥ 5.10.69, < 5.10.195 | ≥ 5.14.8, < 5.15.132 | ≥ 5.16, < 6.1.54 | ≥ 6.2, < 6.5.4
Debian1 product
  • linux< 6.1.55-1 | < 6.5.6-1

3 vendors · 125 products

References

12 links
Show all 12 references