PatchTheCVE: ieee 802.2

PatchTheCVE: ieee 802.2https://patchthecve.com/CVEs with upgrade or downgrade fix stepsCVE-2021-27862: Layer 2 network filtering capabilities such as IPv6 RA guard can be bypassed using LLC/SNAP headers with invalhttps://patchthecve.com/cve/CVE-2021-27862.htmlhttps://patchthecve.com/cve/CVE-2021-27862.htmlWed, 17 Jun 2026 03:45:32 +0000MEDIUM 4.7: 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).CVE-2021-27861: Layer 2 network filtering capabilities such as IPv6 RA guard can be bypassed using LLC/SNAP headers with invalhttps://patchthecve.com/cve/CVE-2021-27861.htmlhttps://patchthecve.com/cve/CVE-2021-27861.htmlWed, 17 Jun 2026 03:45:32 +0000MEDIUM 4.7: Layer 2 network filtering capabilities such as IPv6 RA guard can be bypassed using LLC/SNAP headers with invalid length (and optionally VLAN0 headers)CVE-2021-27854: Layer 2 network filtering capabilities such as IPv6 RA guard can be bypassed using combinations of VLAN 0 headhttps://patchthecve.com/cve/CVE-2021-27854.htmlhttps://patchthecve.com/cve/CVE-2021-27854.htmlWed, 17 Jun 2026 03:45:31 +0000MEDIUM 4.7: Layer 2 network filtering capabilities such as IPv6 RA guard can be bypassed using combinations of VLAN 0 headers, LLC/SNAP headers, and converting frames from Ethernet to Wifi and its reverse.CVE-2021-27853: Layer 2 network filtering capabilities such as IPv6 RA guard or ARP inspection can be bypassed using combinatihttps://patchthecve.com/cve/CVE-2021-27853.htmlhttps://patchthecve.com/cve/CVE-2021-27853.htmlWed, 17 Jun 2026 03:45:31 +0000MEDIUM 4.7: Layer 2 network filtering capabilities such as IPv6 RA guard or ARP inspection can be bypassed using combinations of VLAN 0 headers and LLC/SNAP headers.