CVE-2021-47670: Linux Kernel

High severity, CVSS 8.8. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• Linux Linux Kernel: from 4.0, before 4.19.171 (fixed in 4.19.171); from 4.20, before 5.4.93 (fixed in 5.4.93); from 5.5, before 5.10.11 (fixed in 5.10.11); version 5.11 only

Published 2025-04-17. Last modified 2026-08-04.