CVE-2025-8872 Denial of service in EOS
A crafted packet causes high CPU usage in the OSPFv3 process on Arista EOS, potentially restarting the process and disrupting routing.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-8872?
CVE-2025-8872 is a high-severity denial of service vulnerability in Arista Networks EOS, published on 16 Dec 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-400
Which versions are affected by CVE-2025-8872?
How do I fix CVE-2025-8872?
No fix has been published for CVE-2025-8872 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-8872 being exploited?
There is no known exploitation of CVE-2025-8872 in the wild and no public exploit code.
Sources
Also known as GHSA-93ww-vwhw-jwxm.