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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.

PUBLISHED Reserved 2026-02-11 | Published 2026-06-05 | Updated 2026-06-05 | Assigner Arista




MEDIUM: 5.9CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

HIGH: 8.2CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Problem types

CWE-672: Operation on a Resource after Expiration or Release

Product status

Default status
unaffected

4.34.0 (custom)
affected

4.33.0M (custom)
affected

4.32.0M (custom)
affected

4.31.0M (custom)
affected

4.30.0F (custom) before 4.31.0
affected

4.29.0F (custom) before 4.30.0
affected

4.28.0F (custom) before 4.29.0
affected

4.27.1F (custom) before 4.28.0
affected

References

www.arista.com/...rity-advisory/23419-security-advisory-0134 vendor-advisory

cve.org (CVE-2026-2379)

nvd.nist.gov (CVE-2026-2379)

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