SB20260415105 - Information disclosure in Arista EOS IPSec implementation

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Main Vulnerability Database SB20260415105

SB20260415105 - Information disclosure in Arista EOS IPSec implementation

Published: April 15, 2026

Security Bulletin ID SB20260415105
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Information disclosure

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Operation on a Resource after Expiration or Release (CVE-ID: CVE-2026-2379)

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

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to disclose sensitive information.

The vulnerability exists due to operation on a resource after expiration or release in the IPsec tunnel re-establishment handling when re-establishing IPsec tunnels after physical interface flaps or certain agent restarts. A remote attacker can trigger sequence number mismatches between tunnel endpoints to disclose sensitive information.

Only systems with certain IPsec features enabled and IPsec anti-replay detection disabled are vulnerable.


Remediation

Install update from vendor's website.

References