CVE-2023-53472

Medium

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.

Package Linux Kernel
Published 2025-10-01
Last modified 2026-01-20
CVSS version 3.1
Patch available
Yes

CVSS 3.1 score

5.5

out of 10
Medium
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
High
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness type

CWE-476

CVE-2023-53472 is a NULL Pointer Dereference vulnerability

What is NULL Pointer Dereference?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. Learn more on MITRE CWE

Affected versions

Linux kernel versions 4.14.248, 4.19.208, 5.4.149, 5.10.69, 4.9.284, 5.14.8, 5.15 and later are affected. Fixed in 4.14.326, 4.19.295, 5.4.257, 5.10.195, 5.15.132, 6.1.54, 6.5.4, 6.6 and their respective stable series.

Affected from
≥ 4.14.248 ≥ 4.19.208 ≥ 5.4.149 ≥ 5.10.69 ≥ 4.9.284 ≥ 5.14.8 ≥ 5.15
Fixed in
✓ 4.14.326 4.14.x ✓ 4.19.295 4.19.x ✓ 5.4.257 5.4.x ✓ 5.10.195 5.10.x ✓ 5.15.132 5.15.x ✓ 6.1.54 6.1.x ✓ 6.5.4 6.5.x ✓ 6.6

References

The following references provide additional information about CVE-2023-53472 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

8 patch commits total View all on NVD

Frequently asked questions

  • What is CVE-2023-53472?

    CVE-2023-53472 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as a NULL Pointer Dereference flaw (CWE-476) . It affects Linux kernel versions from 4.14.248 onward and has been patched in 4.14.326, 4.19.295, 5.4.257 and others. CVE-2023-53472 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2023-53472?

    CVE-2023-53472 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H .

  • Is there a patch available for CVE-2023-53472?

    Yes — CVE-2023-53472 has been patched. Fixed versions include 4.14.326, 4.19.295, 5.4.257 and others. If you are running Linux kernel 4.14.248 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2023-53472 actively exploited?

    No — CVE-2023-53472 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

  • What is NULL Pointer Dereference (CWE-476)?

    The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. View CWE-476 on MITRE CWE →

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