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    <lastBuildDate>Tue, 06 Oct 2026 14:04:37 +0000</lastBuildDate>
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      <title>CVE-2026-2379 — Arista EOS IPsec Tunnel Sequence Number Mismatch via Interface Flaps when Anti-Replay is Disabled</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2026-2379</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Arista Networks EOS&lt;/p&gt;
&lt;p&gt;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.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Arista Networks EOS&lt;/p&gt;
&lt;p&gt;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.&lt;/p&gt;</content:encoded>
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