CVE-2025-7048
Unknown Unknown - Not Provided

Denial of Service via MACsec Packet Handling in Arista EOS

Publication date: 2026-01-06

Last updated on: 2026-01-06

Assigner: Arista Networks, Inc.

Description
On affected platforms running Arista EOS with MACsec configuration, a specially crafted packet can cause the MACsec process to terminate unexpectedly. Continuous receipt of these packets with certain MACsec configurations can cause longer term disruption of dataplane traffic.

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Meta Information

Published
2026-01-06
Last Modified
2026-01-06
Generated
2026-07-06
AI Q&A
2026-01-06
EPSS Evaluated
2026-07-05
NVD
CVE-2025-7048
EUVD
EUVD-2026-0962

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
arista arista_eos *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-805 The product uses a sequential operation to read or write a buffer, but it uses an incorrect length value that causes it to access memory that is outside of the bounds of the buffer.

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Executive Summary

This vulnerability affects Arista EOS platforms configured with MACsec. A specially crafted packet can cause the MACsec process to terminate unexpectedly. If such packets are received continuously under certain MACsec configurations, it can lead to longer term disruption of dataplane traffic.

Impact Analysis

The vulnerability can cause the MACsec process on affected devices to stop unexpectedly, which may result in prolonged disruption of dataplane traffic. This can impact network availability and reliability.

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