CVE-2023-53472
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.
How to fix
- linux linux_kernel4.10, 4.14.326, 4.19.295, 5.4.257, 5.10.195, 5.15.132, 6.1.54, 6.5.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 4.9.284 ≤ v < 4.10, 4.14.248 ≤ v < 4.14.326, 4.19.208 ≤ v < 4.19.295, 5.4.149 ≤ v < 5.4.257, 5.10.69 ≤ v < 5.10.195, 5.14.8 ≤ v < 5.15.132, 5.16 ≤ v < 6.1.54, 6.2 ≤ v < 6.5.4 | 4.10, 4.14.326, 4.19.295, 5.4.257, 5.10.195, 5.15.132, 6.1.54, 6.5.4 |
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