# CVE-2025-9019: tcpreplay: A vulnerability has been found in tcpreplay 4.5.1

CVE-2025-9019 is fixed in tcpreplay on 1 platform by DEBIAN-CVE-2025-9019 (version 4.5.2-1), released August 15, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2025-9019
- Priority: Routine
- CVSS: 5.9 (medium)
- EPSS: 0.0119
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 15, 2025

## Description

A vulnerability has been found in tcpreplay 4.5.1. This vulnerability affects the function mask_cidr6 of the file cidr.c of the component tcpprep. The manipulation leads to heap-based buffer overflow. The attack can be initiated remotely. The complexity of an attack is rather high. The exploitation appears to be difficult. The exploit has been disclosed to the public and may be used. The researcher is able to reproduce this with the latest official release 4.5.1 and the current master branch. The code maintainer cannot reproduce this for 4.5.2-beta1. In his reply the maintainer explains that "[i]n that case, this is a duplicate that was fixed in 4.5.2."

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | tcpreplay Debian 14 | 4.5.2-1 | [DEBIAN-CVE-2025-9019](https://patchblox.com/security/data/fix/linux/debian-cve-2025-9019.md) | Aug 15, 2025 |

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Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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