CVE-2021-27861 Information

Description

Layer 2 network filtering capabilities such as IPv6 RA guard can be bypassed using LLC/SNAP headers with invalid length (and optionally VLAN0 headers)

Reference

https://standards.ieee.org/ieee/802.2/1048/ https://datatracker.ietf.org/doc/draft-ietf-v6ops-ra-guard/08/ https://standards.ieee.org/ieee/802.1Q/10323/