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CVE-2023-53472 (GCVE-0-2023-53472)

Vulnerability from cvelistv5 – Published: 2025-10-01 11:42 – Updated: 2026-05-23 15:29
VLAI
Title
pwm: lpc32xx: Remove handling of PWM channels
Summary
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
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: bb4de81eb940e7027f37a6fd3b7ddcb4403deb56 , < abd9b2ee4047ccd980decbf26d61f9637604b1d5 (git)
Affected: 4459118977665f681017e1299933895d54b6e87b , < a9a505f5b39d8fff1a55963a5e524c84639e98b2 (git)
Affected: 81e6b51709da162b94e40a445bb60856406beaa1 , < 04301da4d87067a989f70ee56942bf9d97cd2a45 (git)
Affected: 322b70b522abe03cd59712bb47a72eddd835d19d , < a2d9d884e84bfd37892219b1f55847f36d8e9901 (git)
Affected: 3d2813fb17e5fd0d73c1d1442ca0192bde4af10e , < 5e22217c11424ef958ba28d03ff7167b4d7a8914 (git)
Affected: 3d2813fb17e5fd0d73c1d1442ca0192bde4af10e , < 523f6268e86552a048975749251184c4e9a4b38f (git)
Affected: 3d2813fb17e5fd0d73c1d1442ca0192bde4af10e , < e3a0ddbaf7f1f9ffc070718b417461ced3268758 (git)
Affected: 3d2813fb17e5fd0d73c1d1442ca0192bde4af10e , < 4aae44f65827f0213a7361cf9c32cfe06114473f (git)
Affected: 7fc2172ad4e701d3c6e7dcb7b2efd8df71d2417b (git)
Affected: 1c90a357cef4219cb436e59cc7463888103e104b (git)
Affected: 4.14.248 , < 4.14.326 (semver)
Affected: 4.19.208 , < 4.19.295 (semver)
Affected: 5.4.149 , < 5.4.257 (semver)
Affected: 5.10.69 , < 5.10.195 (semver)
Affected: 4.9.284 , < 4.10 (semver)
Affected: 5.14.8 , < 5.15 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 5.15
Unaffected: 0 , < 5.15 (semver)
Unaffected: 4.14.326 , ≤ 4.14.* (semver)
Unaffected: 4.19.295 , ≤ 4.19.* (semver)
Unaffected: 5.4.257 , ≤ 5.4.* (semver)
Unaffected: 5.10.195 , ≤ 5.10.* (semver)
Unaffected: 5.15.132 , ≤ 5.15.* (semver)
Unaffected: 6.1.54 , ≤ 6.1.* (semver)
Unaffected: 6.5.4 , ≤ 6.5.* (semver)
Unaffected: 6.6 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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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 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    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-30T10:19:06+00:00",
      "cve": "CVE-2023-53472",
      "id": "CVE-2023-53472",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: pwm: lpc32xx: Remove handling of PWM channels",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-53472.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-01T01:16:02Z",
      "cve": "CVE-2023-53472",
      "id": "CVE-2023-53472",
      "initial_release_date": "2025-10-01T23:30:36Z",
      "product_status:known_affected": "413",
      "product_status:known_not_affected": "196",
      "product_status:recommended": "516",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-53472",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-53472.json",
      "version": "51"
    }
  }
}



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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.


Detection rules are retrieved from Rulezet.


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.