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CVE PROGRAM SOURCE RECORD8.2 High

CVE-2026-2379

Arista EOS IPsec Tunnel Sequence Number Mismatch via Interface Flaps when Anti-Replay is Disabled

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Status
Published
Published
Updated
Assigning organization
Arista

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

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Arista Networks EOS

Default version status: unaffected

  • 4.34.0 to ≤ 4.34.3Maffected
  • 4.33.0M to ≤ 4.33.5Maffected
  • 4.32.0M to ≤ 4.32.7Maffected
  • 4.31.0M to ≤ 4.31.9Maffected
  • 4.30.0F to < 4.31.0affected
  • 4.29.0F to < 4.30.0affected
  • 4.28.0F to < 4.29.0affected
  • 4.27.1F to < 4.28.0affected

References