CVE-2022-49915 Information

Description

In the Linux kernel the following vulnerability has been resolved:

mISDN: fix possible memory leak in mISDN_register_device()

Afer commit 1fa5ae857bb1 (\driver core: get rid of struct device’s bus_id string array) the name of device is allocated dynamically add put_device() to give up the reference so that the name can be freed in kobject_cleanup() when the refcount is 0.

Set device class before put_device() to avoid null release() function WARN message in device_release().

Reference

https://git.kernel.org/stable/c/029d5b7688a2f3a86f2a3be5a6ba9cc968c80e41 https://git.kernel.org/stable/c/080aabfb29b2ee9cbb8894a1d039651943d3773e https://git.kernel.org/stable/c/0d4e91efcaee081e919b3c50e875ecbb84290e41 https://git.kernel.org/stable/c/2ff6b669523d3b3d253a044fa9636a67d0694995 https://git.kernel.org/stable/c/a636fc5a7cabd05699b5692ad838c2c7a3abec7b https://git.kernel.org/stable/c/d1d1aede313eb2b9a84afd60ff6cfb7c33631e0e https://git.kernel.org/stable/c/e77d213843e67b4373285712699b692f9c743f61 https://git.kernel.org/stable/c/e7d1d4d9ac0dfa40be4c2c8abd0731659869b297