Double Free in Broadcom Tcpreplay
CVE-2025-51006
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.
Vulnerability class: Double Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (7.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 7th percentile — 7.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Broadcom Tcpreplay — versions 4.5.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/appneta/tcpreplay/issues/926 (Exploit, Patch, Issue Tracking)
- github.com/sy460129/CVE-2025-51006 (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2025-51006?
- CVE-2025-51006 is a high-severity vulnerability in Broadcom Tcpreplay, classified under Double Free. CVSS score: 7.8/10. Published 2025-09-22.
- How severe is CVE-2025-51006?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2025-51006 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.