CVE-2026-73462
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
On affected platforms running Arista EOS with IGMP (Internet Group Management Protocol) snooping configured (enabled by default on all VLANs), a network-adjacent unauthenticated attacker can send malformed network packets on an affected VLAN to cause the IGMP snooping agent to terminate unexpectedly. This results in a temporary disruption of multicast traffic management, which may cause multicast traffic to be flooded to all ports of the affected VLAN until the service recovers. Repeated exploitation could result in a prolonged loss of intended multicast forwarding behavior.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Arista Networks | EOS | 4.36.0 <= 4.36.1F | affected |
| Arista Networks | EOS | 4.35.0 <= 4.35.5M | affected |
| Arista Networks | EOS | 4.34.0 <= 4.34.7.1M | affected |
| Arista Networks | EOS | 4.33.0 <= 4.33.8M | affected |
Weaknesses
- CWE-125: CWE-125 Out-of-bounds Read
Workarounds
There is no mitigation or workaround available. Disabling IGMP snooping will NOT mitigate the issue.
References
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