CVE-2025-8873 - CVE House
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Status published High CVE-2025-8873

Arista EOS Dataplane Denial of Service via Malformed IPsec Packet

Vulnerability Description

On affected platforms running Arista EOS with IPsec configured, a specially crafted packet can cause the dataplane to stop processing all IPsec traffic. The control plane may detect this condition, and attempt to reset the IPsec processing pipeline. After reset traffic may not resume being processed. There is no impact to non-IPsec traffic or to IPsec traffic not originating or terminating on the system. This issue was reported by an Arista customer.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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Affected Vendor

Arista Networks

View all reports →

Affected Software

EOS
Vulnerable Versions:
4.33.0M, 4.32.0M, 4.31.0M, 4.30.0M, 4.29.0M

Timeline

Official Publish: June 4th, 2026
Last Modified: June 5th, 2026
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaknesses (CWE)

CWE-1286

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.