CVE-2026-2379 — MEDIUM (5.9)

Vulnerability 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.

CVSS Score

5.9

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

NONE

Availability

NONE

Related Weaknesses (CWE)

CWE-672

References

https://www.arista.com/en/support/advisories-notices/security-advisory/23419-sec

FAQ

What is CVE-2026-2379?

CVE-2026-2379 is a vulnerability with a CVSS score of 5.9 (MEDIUM). 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 ag...

How severe is CVE-2026-2379?

CVE-2026-2379 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-2379?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.