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Vulnerability record · CVE-2023-4256 · published 21 December 2023

CVE-2023-4256: Broadcom tcpreplay double free vulnerability

Broadcom · Tcpreplay

Within tcpreplay's tcprewrite, a double free vulnerability has been identified in the tcpedit_dlt_cleanup() function within plugins/dlt_plugins.c. This vulnerability can be exploited by supplying a specifically crafted file to the tcprewrite binary. This flaw enables a local attacker to initiate a Denial of Service (DoS) attack.

5.5 CVSS 3.1 Medium EPSS 0.33% · top 76.7% CWE-415 · Double free
5.5CVSS 3.1 base score
0.33%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
10References, 4 tagged exploit
17 Jun 2026Last modified by NVD

Description

Within tcpreplay's tcprewrite, a double free vulnerability has been identified in the tcpedit_dlt_cleanup() function within plugins/dlt_plugins.c. This vulnerability can be exploited by supplying a specifically crafted file to the tcprewrite binary. This flaw enables a local attacker to initiate a Denial of Service (DoS) attack.

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugzilla.redhat.com/show_bug.cgi?id=2255212 ExploitIssue TrackingThird Party Advisory
https://github.com/appneta/tcpreplay/issues/813 ExploitIssue TrackingThird Party Advisory
https://lists.fedoraproject.org/archives/list/[email protected]/message/EHUILQV2YJI5TXXXJA5FQ2HJQ
https://lists.fedoraproject.org/archives/list/[email protected]/message/TMW5CIODKRHUUH7NTAYIRWGSJ
https://lists.fedoraproject.org/archives/list/[email protected]/message/V3GYCHPVJ2VFN3D7FI4IRMDVM
https://bugzilla.redhat.com/show_bug.cgi?id=2255212 ExploitIssue TrackingThird Party Advisory
https://github.com/appneta/tcpreplay/issues/813 ExploitIssue TrackingThird Party Advisory
https://lists.fedoraproject.org/archives/list/[email protected]/message/EHUILQV2YJI5TXXXJA5FQ2HJQ
https://lists.fedoraproject.org/archives/list/[email protected]/message/TMW5CIODKRHUUH7NTAYIRWGSJ
https://lists.fedoraproject.org/archives/list/[email protected]/message/V3GYCHPVJ2VFN3D7FI4IRMDVM

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Source: NIST National Vulnerability Database (record CVE-2023-4256), CISA KEV, FIRST EPSS (scores of 2026-09-30). This page is refreshed as NVD updates the record.