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

Related CVEs

CVE-2021-27862

Key Information

GHSA ID

GHSA-4fhf-8ph3-pp6c

Published

September 28, 2022 12:00 AM

Last Modified

May 21, 2025 3:30 PM

CVSS Score

5.0 /10

Primary Ecosystem

Unknown

Primary Package

Unknown

GitHub Reviewed

✗ No

Dataset

Last updated: July 28, 2025 6:37 AM

Data from GitHub Advisory Database. This information is provided for research and educational purposes.