SB20260415106 - Remote denial of service in Arista EOS with IPsec

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Main Vulnerability Database SB20260415106

SB20260415106 - Remote denial of service in Arista EOS with IPsec

Published: April 15, 2026

Security Bulletin ID SB20260415106
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper Validation of Syntactic Correctness of Input (CVE-ID: CVE-2025-8873)

CWE-ID: CWE-1286 - Improper Validation of Syntactic Correctness of Input

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


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to improper validation of syntactic correctness of input in the IPsec dataplane processing pipeline when processing a specially crafted packet. A remote attacker can send a specially crafted packet to cause a denial of service.

Only systems with IPsec configured are vulnerable. Non-IPsec traffic and IPsec traffic not originating or terminating on the system are not affected.


Remediation

Install update from vendor's website.

References