CVE-2021-47669: Linux Kernel

High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days.

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().

Affected products

• Linux Linux Kernel: from 4.12, before 4.14.218 (fixed in 4.14.218); from 4.15, 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 2026-06-17.