Description
On affected platforms with hardware IPSec support running Arista EOS with certain IPsec features enabled, EOS may exhibit unexpected behavior in specific cases. Physical interface flaps and certain agent restarts can cause IPsec tunnel re-establishment with existing Security Associations, resulting in sequence number mismatches between tunnel endpoints potentially causing unstable communication.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Arista Networks | EOS | 4.34.0 – ≤ 4.34.3M, 4.33.0M – ≤ 4.33.5M, 4.32.0M – ≤ 4.32.7M, 4.31.0M – ≤ 4.31.9M, 4.30.0F – < 4.31.0, 4.29.0F – < 4.30.0, 4.28.0F – < 4.29.0, 4.27.1F – < 4.28.0 | 4.31.0 |
Advisories 1
- WID-SEC-2026-0432 Arista EOS: Schwachstelle ermöglicht Offenlegung von Informationen BSI CERT-Bund (WID) · Jun 7, 2026