Out-of-bounds read in Tcpreplay - #VU142676
Published: August 15, 2026
Vulnerability identifier: #VU142676
CSH Severity: Medium
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service and disclose sensitive information.
The vulnerability exists due to out-of-bounds read in tcpprep/tcpreplay/tcprewrite cache-file parsing when processing a crafted cache file with a mismatched packets_per_byte value and index stride. A remote attacker can trick the victim into processing a crafted cache file to cause a denial of service and disclose sensitive information.
User interaction is required to run tcpprep, tcpreplay, or tcprewrite on an attacker-supplied cache file.
Affected software
Tcpreplay
Fedora
tcpreplay
Fedora
tcpreplay
Remediation
Install security update from vendor's website.
Tcpreplay - update to 4.6.1
tcpreplay - addressed in versions 4.6.1-1.el8, 4.6.1-1.el9, 4.6.1-1.fc43, 4.6.1-1.fc44
tcpreplay - addressed in versions 4.6.1-1.el8, 4.6.1-1.el9, 4.6.1-1.fc43, 4.6.1-1.fc44