Out-of-bounds write in Tcpreplay - #VU142674
Published: August 15, 2026
Vulnerability identifier: #VU142674
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to out-of-bounds write in the libtcpedit dlt_radiotap plugin function dlt_radiotap_get_80211() when processing an untrusted pcap_pkthdr/pktdata pair through the public tcpedit_packet() API. A remote attacker can supply a crafted packet with attacker-controlled length and content to execute arbitrary code.
User interaction is required to process attacker-supplied input, and the issue is reachable in third-party programs that link libtcpedit and pass an unclamped caplen from an untrusted source.
Affected software
Tcpreplay
Remediation
Install security update from vendor's website.
Tcpreplay - update to 4.6.1