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
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.02% 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.