# CVE-2025-51006: tcpreplay: Within tcpreplay's tcprewrite, a double free vulnerability has been identified in the dlt_linuxsll2_cleanup() functio...

CVE-2025-51006 is fixed in tcpreplay on 1 platform, first by DEBIAN-CVE-2025-51006, released September 22, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2025-51006
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0019
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 22, 2025

## Description

Within tcpreplay's tcprewrite, a double free vulnerability has been identified in the dlt_linuxsll2_cleanup() function in plugins/dlt_linuxsll2/linuxsll2.c. This vulnerability is triggered when tcpedit_dlt_cleanup() indirectly invokes the cleanup routine multiple times on the same memory region. By supplying a specifically crafted pcap file to the tcprewrite binary, a local attacker can exploit this flaw to cause a Denial of Service (DoS) via memory corruption.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | tcpreplay Debian 14 | 4.5.2-1 | [DEBIAN-CVE-2025-51006](https://patchblox.com/security/data/fix/linux/debian-cve-2025-51006.md) | Sep 22, 2025 |
| Linux | tcpreplay opensuse-leap 16.0 | 4.5.2-bp160.1.1 | [OPENSUSE-SU-2025:20119-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20119-1.md) | Nov 27, 2025 |

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Data as of 2026-11-09T19:38:12Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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