CVE-2023-53472

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 v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/04301da4d87067a989f70ee56942bf9d97cd2a45	Patch
https://git.kernel.org/stable/c/4aae44f65827f0213a7361cf9c32cfe06114473f	Patch
https://git.kernel.org/stable/c/523f6268e86552a048975749251184c4e9a4b38f	Patch
https://git.kernel.org/stable/c/5e22217c11424ef958ba28d03ff7167b4d7a8914	Patch
https://git.kernel.org/stable/c/a2d9d884e84bfd37892219b1f55847f36d8e9901	Patch
https://git.kernel.org/stable/c/a9a505f5b39d8fff1a55963a5e524c84639e98b2	Patch
https://git.kernel.org/stable/c/abd9b2ee4047ccd980decbf26d61f9637604b1d5	Patch
https://git.kernel.org/stable/c/e3a0ddbaf7f1f9ffc070718b417461ced3268758	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

No history.

Information

Published : 2025-10-01 12:15

Updated : 2026-01-20 17:03

NVD link : CVE-2023-53472

Mitre link : CVE-2023-53472

CVE.ORG link : CVE-2023-53472

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-476

NULL Pointer Dereference

{"id": "CVE-2023-53472", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "published": "2025-10-01T12:15:49.420", "references": [{"url": "https://git.kernel.org/stable/c/04301da4d87067a989f70ee56942bf9d97cd2a45", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/4aae44f65827f0213a7361cf9c32cfe06114473f", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/523f6268e86552a048975749251184c4e9a4b38f", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/5e22217c11424ef958ba28d03ff7167b4d7a8914", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a2d9d884e84bfd37892219b1f55847f36d8e9901", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a9a505f5b39d8fff1a55963a5e524c84639e98b2", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/abd9b2ee4047ccd980decbf26d61f9637604b1d5", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/e3a0ddbaf7f1f9ffc070718b417461ced3268758", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-476"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npwm: lpc32xx: Remove handling of PWM channels\n\nBecause LPC32xx PWM controllers have only a single output which is\nregistered as the only PWM device/channel per controller, it is known in\nadvance that pwm->hwpwm value is always 0. On basis of this fact\nsimplify the code by removing operations with pwm->hwpwm, there is no\ncontrols which require channel number as input.\n\nEven though I wasn't aware at the time when I forward ported that patch,\nthis fixes a null pointer dereference as lpc32xx->chip.pwms is NULL\nbefore devm_pwmchip_add() is called."}], "lastModified": "2026-01-20T17:03:13.247", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6D5E2E93-CF7C-4EB8-A897-64BAD08711B7", "versionEndExcluding": "4.10", "versionStartIncluding": "4.9.284"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "416B8F88-942F-4850-9092-1038ECDD429B", "versionEndExcluding": "4.14.326", "versionStartIncluding": "4.14.248"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B23BA97E-A1DF-414D-8E03-D3657F31B448", "versionEndExcluding": "4.19.295", "versionStartIncluding": "4.19.208"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A6D8239E-B285-44F7-84FE-07F052938EE9", "versionEndExcluding": "5.4.257", "versionStartIncluding": "5.4.149"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "39657E45-4B2D-49C0-84C9-71C3DF7DB55C", "versionEndExcluding": "5.10.195", "versionStartIncluding": "5.10.69"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "BE044518-5B3F-43AB-A0D0-D340B46C2255", "versionEndExcluding": "5.15.132", "versionStartIncluding": "5.14.8"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7353B9B4-AFFC-45DE-840E-1A7D2B00E7AD", "versionEndExcluding": "6.1.54", "versionStartIncluding": "5.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CA8C8B88-AF36-445D-A228-AD78F3615373", "versionEndExcluding": "6.5.4", "versionStartIncluding": "6.2"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}