CVE-2021-47670 Information

Description

In the Linux kernel the following vulnerability has been resolved:

can: peak_usb: fix use after free bugs

After calling peak_usb_netif_rx_ni(skb) dereferencing skb is unsafe. Especially the can_frame cf which aliases skb memory is accessed after the peak_usb_netif_rx_ni().

Reordering the lines solves the issue.

Reference

https://git.kernel.org/stable/c/50aca891d7a554db0901b245167cd653d73aaa71 https://git.kernel.org/stable/c/5408824636fa0dfedb9ecb0d94abd573131bfbbe https://git.kernel.org/stable/c/ddd1416f44130377798c1430b76503513b7497c2 https://git.kernel.org/stable/c/ec939c13c3fff2114479769c8380b7f1a54feca9