CVE-2021-47669 Information

Description

In the Linux kernel the following vulnerability has been resolved:

can: vxcan: vxcan_xmit: fix use after free bug

After calling netif_rx_ni(skb) dereferencing skb is unsafe. Especially the canfd_frame cfd which aliases skb memory is accessed after the netif_rx_ni().

Reference

https://git.kernel.org/stable/c/6d6dcf2399cdd26f7f5426ca8dd8366b7f2ca105 https://git.kernel.org/stable/c/75854cad5d80976f6ea0f0431f8cedd3bcc475cb https://git.kernel.org/stable/c/9b820875a32a3443d67bfd368e93038354e98052 https://git.kernel.org/stable/c/a24476b37167816e6352ca1a2cf3769847774f70 https://git.kernel.org/stable/c/e771a874076115df8bff27d325edfd2340e4ec69