GHSA-3G53-3CMJ-QJRH

Vulnerability from github – Published: 2025-10-01 12:30 – Updated: 2026-01-20 18:31
VLAI
Details

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.

Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2023-53472"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-10-01T12:15:49Z",
    "severity": "MODERATE"
  },
  "details": "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-\u003ehwpwm value is always 0. On basis of this fact\nsimplify the code by removing operations with pwm-\u003ehwpwm, there is no\ncontrols which require channel number as input.\n\nEven though I wasn\u0027t aware at the time when I forward ported that patch,\nthis fixes a null pointer dereference as lpc32xx-\u003echip.pwms is NULL\nbefore devm_pwmchip_add() is called.",
  "id": "GHSA-3g53-3cmj-qjrh",
  "modified": "2026-01-20T18:31:51Z",
  "published": "2025-10-01T12:30:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53472"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/04301da4d87067a989f70ee56942bf9d97cd2a45"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4aae44f65827f0213a7361cf9c32cfe06114473f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/523f6268e86552a048975749251184c4e9a4b38f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5e22217c11424ef958ba28d03ff7167b4d7a8914"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a2d9d884e84bfd37892219b1f55847f36d8e9901"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a9a505f5b39d8fff1a55963a5e524c84639e98b2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/abd9b2ee4047ccd980decbf26d61f9637604b1d5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e3a0ddbaf7f1f9ffc070718b417461ced3268758"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.