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CVE-2021-37159

Description

hso_free_net_device in drivers/net/usb/hso.c in the Linux kernel through 5.13.4 calls unregister_netdev without checking for the NETREG_REGISTERED state, leading to a use-after-free and a double free.

POC

Reference

- https://bugzilla.suse.com/show_bug.cgi?id=1188601

- https://www.oracle.com/security-alerts/cpujul2022.html

Github

- https://github.com/ARPSyndicate/cvemon