CVE-2025-8872

MEDIUM

Arista EOS 4.31.0-4.34.0 - Denial of Service via OSPFv3 Packet Processing

Title source: llm

Description

On affected platforms running Arista EOS with OSPFv3 configured, a specially crafted packet can cause the OSFPv3 process to have high CPU utilization which may result in the OSFPv3 process being restarted. This may cause disruption in the OSFPv3 routes on the switch. This issue was discovered internally by Arista and is not aware of any malicious uses of this issue in customer networks.

References (1)

Core 1

Core References

Various Sources

https://www.arista.com/en/support/advisories-notices/security-advisory/23115-security-advisory-0128

Scores

CVSS v3 6.5

EPSS 0.0025

EPSS Percentile 16.4%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-400

Status published

Products (5)

Arista Networks/EOS < 4.31.0

Arista Networks/EOS 4.31.0 - 4.31.8M

Arista Networks/EOS 4.32.0 - 4.32.7M

Arista Networks/EOS 4.33.0 - 4.33.4M

Arista Networks/EOS 4.34.0 - 4.34.1F

Published Dec 16, 2025

Tracked Since Feb 18, 2026