CVE-2023-53472
Analyzed
Analyzed - Analysis Complete
BaseFortify
Publication date: 2025-10-01
Last updated on: 2026-01-20
Assigner: kernel.org
Description
Description
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 Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| linux | linux_kernel | From 4.9.284 (inc) to 4.10 (exc) |
| linux | linux_kernel | From 4.14.248 (inc) to 4.14.326 (exc) |
| linux | linux_kernel | From 4.19.208 (inc) to 4.19.295 (exc) |
| linux | linux_kernel | From 5.4.149 (inc) to 5.4.257 (exc) |
| linux | linux_kernel | From 5.10.69 (inc) to 5.10.195 (exc) |
| linux | linux_kernel | From 5.14.8 (inc) to 5.15.132 (exc) |
| linux | linux_kernel | From 5.16 (inc) to 6.1.54 (exc) |
| linux | linux_kernel | From 6.2 (inc) to 6.5.4 (exc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-476 | The product dereferences a pointer that it expects to be valid but is NULL. |
