Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected bb4de81eb940e7027f37a6fd3b7ddcb4403deb56 before abd9b2ee4047ccd980decbf26d61f9637604b1d5; affected 4459118977665f681017e1299933895d54b6e87b before a9a505f5b39d8fff1a55963a5e524c84639e98b2; affected 81e6b51709da162b94e40a445bb60856406beaa1 before 04301da4d87067a989f70ee56942bf9d97cd2a45; affected 322b70b522abe03cd59712bb47a72eddd835d19d before a2d9d884e84bfd37892219b1f55847f36d8e9901; affected 3d2813fb17e5fd0d73c1d1442ca0192bde4af10e before 5e22217c11424ef958ba28d03ff7167b4d7a8914; affected 3d2813fb17e5fd0d73c1d1442ca0192bde4af10e before 523f6268e86552a048975749251184c4e9a4b38f; affected 3d2813fb17e5fd0d73c1d1442ca0192bde4af10e before e3a0ddbaf7f1f9ffc070718b417461ced3268758; affected 3d2813fb17e5fd0d73c1d1442ca0192bde4af10e before 4aae44f65827f0213a7361cf9c32cfe06114473f; affected 7fc2172ad4e701d3c6e7dcb7b2efd8df71d2417b; affected 1c90a357cef4219cb436e59cc7463888103e104b; affected 4.14.248 before 4.14.326; affected 4.19.208 before 4.19.295; affected 5.4.149 before 5.4.257; affected 5.10.69 before 5.10.195; affected 4.9.284 before 4.10; affected 5.14.8 before 5.15 |
| Linux / Linux | affected 5.15; unaffected 0 before 5.15; unaffected 4.14.326 through 4.14.*; unaffected 4.19.295 through 4.19.*; unaffected 5.4.257 through 5.4.*; unaffected 5.10.195 through 5.10.*; unaffected 5.15.132 through 5.15.*; unaffected 6.1.54 through 6.1.*; unaffected 6.5.4 through 6.5.*; unaffected 6.6 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/abd9b2ee4047ccd980decbf26d61f9637604b1d5
- https://git.kernel.org/stable/c/a9a505f5b39d8fff1a55963a5e524c84639e98b2
- https://git.kernel.org/stable/c/04301da4d87067a989f70ee56942bf9d97cd2a45
- https://git.kernel.org/stable/c/a2d9d884e84bfd37892219b1f55847f36d8e9901
- https://git.kernel.org/stable/c/5e22217c11424ef958ba28d03ff7167b4d7a8914
- https://git.kernel.org/stable/c/523f6268e86552a048975749251184c4e9a4b38f
- https://git.kernel.org/stable/c/e3a0ddbaf7f1f9ffc070718b417461ced3268758
- https://git.kernel.org/stable/c/4aae44f65827f0213a7361cf9c32cfe06114473f