CVE-2025-9649 appneta tcpreplay send_packets.c calc_sleep_time divide by zero
A local attacker can cause a denial of service in tcpreplay via a divide-by-zero error in the packet sending logic.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-9649?
CVE-2025-9649 is a medium-severity denial of service vulnerability in Broadcom Tcpreplay, published on 29 Aug 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A security vulnerability has been detected in appneta tcpreplay 4.5.1. Impacted is the function calc_sleep_time of the file send_packets.c. Such manipulation leads to divide by zero. An attack has to be approached locally. The exploit has been disclosed publicly and may be used. Upgrading to version 4.5.3-beta3 is recommended to address this issue. It is advisable to upgrade the affected component. The vendor confirms in a GitHub issue reply: "Was able to reproduce in 6fcbf03 but NOT 4.5.3-beta3."
Which versions are affected by CVE-2025-9649?
It affects 1 product.
Products include Broadcom Tcpreplay.
How do I fix CVE-2025-9649?
Upgrade to a fixed version.
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-2025-9649 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-9649 exists.
Other vulnerabilities in Broadcom Tcpreplay
Sources
Also known as DEBIAN-CVE-2025-9649, GHSA-cgx8-mh65-hcp4, UBUNTU-CVE-2025-9649.