PT-2025-40179 · Linux+2 · Linux Kernel+2

Published 2025-10-01 · Updated 2025-11-19 · CVE-2023-53472

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The Linux kernel contains a flaw related to PWM (Pulse Width Modulation) handling within the lpc32xx subsystem. Specifically, the code unnecessarily attempts operations with pwm->hwpwm, which is always zero for LPC32xx PWM controllers. This simplification removes code that could lead to a null pointer dereference because lpc32xx->chip.pwms is NULL before devm pwmchip add() is called.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2023-53472

SUSE-SU-2025:03600-1

SUSE-SU-2025:03615-1

SUSE-SU-2025:03628-1

SUSE-SU-2025:03634-1

SUSE-SU-2025:20851-1

SUSE-SU-2025:20861-1

SUSE-SU-2025:20870-1

SUSE-SU-2025:20898-1

SUSE-SU-2025:3716-1

SUSE-SU-2025:3751-1

SUSE-SU-2025:3761-1

SUSE-SU-2025:4057-1

SUSE-SU-2025:4132-1

SUSE-SU-2025:4141-1

Affected Products

Astra Linux

Linux Kernel

Suse

References · 2008

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53472.json · Exploit
• https://git.kernel.org/stable/c/abd9b2ee4047ccd980decbf26d61f9637604b1d5 · Patch
• https://git.kernel.org/stable/c/e3a0ddbaf7f1f9ffc070718b417461ced3268758 · Patch
• https://cve.org/CVERecord?id=CVE-2023-53472 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2025:20851-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-53472 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:4141-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:20870-1 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-53472 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:4057-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:3716-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:03634-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-53472 · Vendor Advisory
• https://git.kernel.org/stable/c/4aae44f65827f0213a7361cf9c32cfe06114473f · Patch
• https://osv.dev/vulnerability/SUSE-SU-2025:3751-1 · Vendor Advisory