5.5

CVE-2023-53472

pwm: lpc32xx: Remove handling of PWM channels

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 4.9.284 < 4.10
Linux ≫ Linux Kernel Version >= 4.14.248 < 4.14.326
Linux ≫ Linux Kernel Version >= 4.19.208 < 4.19.295
Linux ≫ Linux Kernel Version >= 5.4.149 < 5.4.257
Linux ≫ Linux Kernel Version >= 5.10.69 < 5.10.195
Linux ≫ Linux Kernel Version >= 5.14.8 < 5.15.132
Linux ≫ Linux Kernel Version >= 5.16 < 6.1.54
Linux ≫ Linux Kernel Version >= 6.2 < 6.5.4
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.15% 0.042
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-476 NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.

https://git.kernel.org/stable/c/04301da4d87067a989f70ee56942bf9d97cd2a45
Patch
https://git.kernel.org/stable/c/4aae44f65827f0213a7361cf9c32cfe06114473f
Patch
https://git.kernel.org/stable/c/523f6268e86552a048975749251184c4e9a4b38f
Patch
https://git.kernel.org/stable/c/5e22217c11424ef958ba28d03ff7167b4d7a8914
Patch
https://git.kernel.org/stable/c/a2d9d884e84bfd37892219b1f55847f36d8e9901
Patch
https://git.kernel.org/stable/c/a9a505f5b39d8fff1a55963a5e524c84639e98b2
Patch
https://git.kernel.org/stable/c/abd9b2ee4047ccd980decbf26d61f9637604b1d5
Patch
https://git.kernel.org/stable/c/e3a0ddbaf7f1f9ffc070718b417461ced3268758
Patch