Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2023-53472

Severity CVSS v4.0:
Pending analysis
Type:
CWE-476 NULL Pointer Dereference
Publication date:
01/10/2025
Last modified:
20/01/2026

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> pwm: lpc32xx: Remove handling of PWM channels<br /> <br /> Because LPC32xx PWM controllers have only a single output which is<br /> registered as the only PWM device/channel per controller, it is known in<br /> advance that pwm-&gt;hwpwm value is always 0. On basis of this fact<br /> simplify the code by removing operations with pwm-&gt;hwpwm, there is no<br /> controls which require channel number as input.<br /> <br /> Even though I wasn&amp;#39;t aware at the time when I forward ported that patch,<br /> this fixes a null pointer dereference as lpc32xx-&gt;chip.pwms is NULL<br /> before devm_pwmchip_add() is called.

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
5.50
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 4.9.284 (including) 4.10 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 4.14.248 (including) 4.14.326 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 4.19.208 (including) 4.19.295 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.4.149 (including) 5.4.257 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.10.69 (including) 5.10.195 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.14.8 (including) 5.15.132 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.16 (including) 6.1.54 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.2 (including) 6.5.4 (excluding)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools