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CVE-2021-27861
Published: Sep 27, 2022
Modified: Nov 4, 2025
PUBLISHED
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)
| Vendor | Product | Versions |
|---|---|---|
IEEE | 802.2 | affected 802.2h-1997 - <= 802.2h-1997 |
IETF | draft-ietf-v6ops-ra-guard | affected 08 - <= 08 |
IETF | P802.1Q | affected D1.0 - <= D1.0 |
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