CVE-2023-53472
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…
Does this matter?
Lower severity and a low EPSS score (0.16%). Track it; it rarely justifies an emergency change on its own.
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 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.16% probability · 5th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/04301da4d87067a989f70ee56942bf9d97cd2a45Patch
- https://git.kernel.org/stable/c/4aae44f65827f0213a7361cf9c32cfe06114473fPatch
- https://git.kernel.org/stable/c/523f6268e86552a048975749251184c4e9a4b38fPatch
- https://git.kernel.org/stable/c/5e22217c11424ef958ba28d03ff7167b4d7a8914Patch
- https://git.kernel.org/stable/c/a2d9d884e84bfd37892219b1f55847f36d8e9901Patch
- https://git.kernel.org/stable/c/a9a505f5b39d8fff1a55963a5e524c84639e98b2Patch
- https://git.kernel.org/stable/c/abd9b2ee4047ccd980decbf26d61f9637604b1d5Patch
- https://git.kernel.org/stable/c/e3a0ddbaf7f1f9ffc070718b417461ced3268758Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.