CyberRota Analysis
This is a high severity vulnerability with a CVSS score of 7.8. It affects Linux.
CVE
CVE-2021-47293
Severity
HIGH
CVSS
7.8
EPSS
0.23%
Linux
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: net/sched: act_skbmod: Skip non-Ethernet packets Currently tcf_skbmod_act() assumes that packets use Ethernet as their L2 protocol, which is not always the case. As an example, for CAN devices: $ ip link add dev vcan0 type vcan $ ip link set up vcan0 $ tc qdisc add dev vcan0 root handle 1: htb $ tc filter add dev vcan0 parent 1: protocol ip prio 10 \ matchall action skbmod swap mac Doing the above silently corrupts all the packets. Do not perform skbmod actions for non-Ethernet packets.
Related CVEs
Other vulnerabilities affecting the same vendor(s)