CVE-2021-27862

MediumCVSS 4.7/10Last modified Jun 17, 2026

Description

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).

Metrics

CVSS 3.1 4.7/10CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

Weakness enumeration

CWE-130 CWE-290

Affected software

Vendor	Product	Versions
IEEE	802.2	>= 802.2h-1997, <= 802.2h-1997
IETF	draft-ietf-v6ops-ra-guard-08	>= 08, <= 08

References

Timeline

Published: Sep 27, 2022
Last modified: Jun 17, 2026
NVD status: Modified

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