CVE-2023-53472
Last modified
CVE-2023-53472 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. 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.. EPSS estimates a 0.15% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.9.284, < 4.10 |
| Linux | Linux Kernel | >= 4.14.248, < 4.14.326 |
| Linux | Linux Kernel | >= 4.19.208, < 4.19.295 |
| Linux | Linux Kernel | >= 5.4.149, < 5.4.257 |
| Linux | Linux Kernel | >= 5.10.69, < 5.10.195 |
| Linux | Linux Kernel | >= 5.14.8, < 5.15.132 |
| Linux | Linux Kernel | >= 5.16, < 6.1.54 |
| Linux | Linux Kernel | >= 6.2, < 6.5.4 |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
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