Resource exhaustion in Arista Extensible Operating System (EOS) and Arista CloudEOS VM - CVE-2025-8872
Published: April 15, 2026
Vulnerability identifier: #VU126173
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-8872
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to uncontrolled resource consumption in the OSPFv3 process when handling a specially crafted OSPFv3 packet. A remote user can send a specially crafted packet to cause a denial of service.
Exploitation requires OSPFv3 to be configured in the default or a non-default VRF and at least one neighbor to be present.
Affected software
Arista Extensible Operating System (EOS)
Arista CloudEOS VM
Arista CloudEOS VM
How to mitigate CVE-2025-8872
Install security update from vendor's website.
Arista Extensible Operating System (EOS) - addressed in versions 4.31.9M, 4.32.8M, 4.33.5M, 4.34.2F
Arista CloudEOS VM - addressed in versions 4.31.9M, 4.32.8M, 4.33.5M, 4.34.2F
Arista CloudEOS VM - addressed in versions 4.31.9M, 4.32.8M, 4.33.5M, 4.34.2F