{"id":"CVE-2023-53472","state":"PUBLISHED","title":"pwm: lpc32xx: Remove handling of PWM channels","description":"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.","publishedAt":"2025-10-01T11:42:41.951Z","updatedAt":"2026-05-23T15:29:04.344Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"bb4de81eb940e7027f37a6fd3b7ddcb4403deb56","status":"affected","lessThan":"abd9b2ee4047ccd980decbf26d61f9637604b1d5","versionType":"git"},{"version":"4459118977665f681017e1299933895d54b6e87b","status":"affected","lessThan":"a9a505f5b39d8fff1a55963a5e524c84639e98b2","versionType":"git"},{"version":"81e6b51709da162b94e40a445bb60856406beaa1","status":"affected","lessThan":"04301da4d87067a989f70ee56942bf9d97cd2a45","versionType":"git"},{"version":"322b70b522abe03cd59712bb47a72eddd835d19d","status":"affected","lessThan":"a2d9d884e84bfd37892219b1f55847f36d8e9901","versionType":"git"},{"version":"3d2813fb17e5fd0d73c1d1442ca0192bde4af10e","status":"affected","lessThan":"5e22217c11424ef958ba28d03ff7167b4d7a8914","versionType":"git"},{"version":"3d2813fb17e5fd0d73c1d1442ca0192bde4af10e","status":"affected","lessThan":"523f6268e86552a048975749251184c4e9a4b38f","versionType":"git"},{"version":"3d2813fb17e5fd0d73c1d1442ca0192bde4af10e","status":"affected","lessThan":"e3a0ddbaf7f1f9ffc070718b417461ced3268758","versionType":"git"},{"version":"3d2813fb17e5fd0d73c1d1442ca0192bde4af10e","status":"affected","lessThan":"4aae44f65827f0213a7361cf9c32cfe06114473f","versionType":"git"},{"version":"7fc2172ad4e701d3c6e7dcb7b2efd8df71d2417b","status":"affected","versionType":"git"},{"version":"1c90a357cef4219cb436e59cc7463888103e104b","status":"affected","versionType":"git"},{"version":"4.14.248","status":"affected","lessThan":"4.14.326","versionType":"semver"},{"version":"4.19.208","status":"affected","lessThan":"4.19.295","versionType":"semver"},{"version":"5.4.149","status":"affected","lessThan":"5.4.257","versionType":"semver"},{"version":"5.10.69","status":"affected","lessThan":"5.10.195","versionType":"semver"},{"version":"4.9.284","status":"affected","lessThan":"4.10","versionType":"semver"},{"version":"5.14.8","status":"affected","lessThan":"5.15","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/pwm/pwm-lpc32xx.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.15","versionType":"semver"},{"version":"4.14.326","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.295","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.257","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.195","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.132","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.54","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.5.4","status":"unaffected","lessThanOrEqual":"6.5.*","versionType":"semver"},{"version":"6.6","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/pwm/pwm-lpc32xx.c"]}],"references":["https://git.kernel.org/stable/c/abd9b2ee4047ccd980decbf26d61f9637604b1d5","https://git.kernel.org/stable/c/a9a505f5b39d8fff1a55963a5e524c84639e98b2","https://git.kernel.org/stable/c/04301da4d87067a989f70ee56942bf9d97cd2a45","https://git.kernel.org/stable/c/a2d9d884e84bfd37892219b1f55847f36d8e9901","https://git.kernel.org/stable/c/5e22217c11424ef958ba28d03ff7167b4d7a8914","https://git.kernel.org/stable/c/523f6268e86552a048975749251184c4e9a4b38f","https://git.kernel.org/stable/c/e3a0ddbaf7f1f9ffc070718b417461ced3268758","https://git.kernel.org/stable/c/4aae44f65827f0213a7361cf9c32cfe06114473f"],"weaknesses":[],"ingestedAt":"2026-10-29T20:06:33.064Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/53xxx/CVE-2023-53472.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-53472","state":"PUBLISHED","datePublished":"2025-10-01T11:42:41.951Z","dateUpdated":"2026-05-23T15:29:04.344Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-10-01T11:39:39.401Z"},"containers":{"cna":{"title":"pwm: lpc32xx: Remove handling of PWM channels","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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"bb4de81eb940e7027f37a6fd3b7ddcb4403deb56","status":"affected","lessThan":"abd9b2ee4047ccd980decbf26d61f9637604b1d5","versionType":"git"},{"version":"4459118977665f681017e1299933895d54b6e87b","status":"affected","lessThan":"a9a505f5b39d8fff1a55963a5e524c84639e98b2","versionType":"git"},{"version":"81e6b51709da162b94e40a445bb60856406beaa1","status":"affected","lessThan":"04301da4d87067a989f70ee56942bf9d97cd2a45","versionType":"git"},{"version":"322b70b522abe03cd59712bb47a72eddd835d19d","status":"affected","lessThan":"a2d9d884e84bfd37892219b1f55847f36d8e9901","versionType":"git"},{"version":"3d2813fb17e5fd0d73c1d1442ca0192bde4af10e","status":"affected","lessThan":"5e22217c11424ef958ba28d03ff7167b4d7a8914","versionType":"git"},{"version":"3d2813fb17e5fd0d73c1d1442ca0192bde4af10e","status":"affected","lessThan":"523f6268e86552a048975749251184c4e9a4b38f","versionType":"git"},{"version":"3d2813fb17e5fd0d73c1d1442ca0192bde4af10e","status":"affected","lessThan":"e3a0ddbaf7f1f9ffc070718b417461ced3268758","versionType":"git"},{"version":"3d2813fb17e5fd0d73c1d1442ca0192bde4af10e","status":"affected","lessThan":"4aae44f65827f0213a7361cf9c32cfe06114473f","versionType":"git"},{"version":"7fc2172ad4e701d3c6e7dcb7b2efd8df71d2417b","status":"affected","versionType":"git"},{"version":"1c90a357cef4219cb436e59cc7463888103e104b","status":"affected","versionType":"git"},{"version":"4.14.248","status":"affected","lessThan":"4.14.326","versionType":"semver"},{"version":"4.19.208","status":"affected","lessThan":"4.19.295","versionType":"semver"},{"version":"5.4.149","status":"affected","lessThan":"5.4.257","versionType":"semver"},{"version":"5.10.69","status":"affected","lessThan":"5.10.195","versionType":"semver"},{"version":"4.9.284","status":"affected","lessThan":"4.10","versionType":"semver"},{"version":"5.14.8","status":"affected","lessThan":"5.15","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/pwm/pwm-lpc32xx.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.15","versionType":"semver"},{"version":"4.14.326","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.295","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.257","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.195","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.132","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.54","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.5.4","status":"unaffected","lessThanOrEqual":"6.5.*","versionType":"semver"},{"version":"6.6","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/pwm/pwm-lpc32xx.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/abd9b2ee4047ccd980decbf26d61f9637604b1d5"},{"url":"https://git.kernel.org/stable/c/a9a505f5b39d8fff1a55963a5e524c84639e98b2"},{"url":"https://git.kernel.org/stable/c/04301da4d87067a989f70ee56942bf9d97cd2a45"},{"url":"https://git.kernel.org/stable/c/a2d9d884e84bfd37892219b1f55847f36d8e9901"},{"url":"https://git.kernel.org/stable/c/5e22217c11424ef958ba28d03ff7167b4d7a8914"},{"url":"https://git.kernel.org/stable/c/523f6268e86552a048975749251184c4e9a4b38f"},{"url":"https://git.kernel.org/stable/c/e3a0ddbaf7f1f9ffc070718b417461ced3268758"},{"url":"https://git.kernel.org/stable/c/4aae44f65827f0213a7361cf9c32cfe06114473f"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-23T15:29:04.344Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14.248","versionEndExcluding":"4.14.326"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19.208","versionEndExcluding":"4.19.295"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4.149","versionEndExcluding":"5.4.257"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.69","versionEndExcluding":"5.10.195"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"5.15.132"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.1.54"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*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