CVE-2026-119600

tcpflow < 1.7.0 Out-of-Bounds Read via TCP Demultiplexer Payload Length

Published Oct 30, 2026 CVSS 4.0 · 6.3 Medium EPSS < 1% KEV · Not listed
Description
tcpflow before 1.7.0 contains an out-of-bounds read vulnerability that allows unauthenticated attackers to read process memory by sending packets with forged IP payload lengths. Attackers can inject crafted IPv4 or IPv6 TCP packets into captured traffic or pcap files to leak adjacent memory into reconstructed flow files or crash tcpflow.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Description tcpflow through 1.6.1 contains an out-of-bounds read vulnerability that allows unauthenticated attackers to read process memory by sending packets with forged IP payload lengths. Attackers can inject crafted IPv4 or IPv6 TCP packets into captured traffic or pcap files to leak adjacent memory into reconstructed flow files or crash tcpflow. tcpflow before 1.7.0 contains an out-of-bounds read vulnerability that allows unauthenticated attackers to read process memory by sending packets with forged IP payload lengths. Attackers can inject crafted IPv4 or IPv6 TCP packets into captured traffic or pcap files to leak adjacent memory into reconstructed flow files or crash tcpflow.
Title tcpflow through 1.6.1 Out-of-Bounds Read via TCP Demultiplexer Payload Length tcpflow < 1.7.0 Out-of-Bounds Read via TCP Demultiplexer Payload Length
References
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Simsong
Simsong tcpflow
Vendors & Products Simsong
Simsong tcpflow
Type Values Removed Values Added
Description tcpflow through 1.6.1 contains an out-of-bounds read vulnerability that allows unauthenticated attackers to read process memory by sending packets with forged IP payload lengths. Attackers can inject crafted IPv4 or IPv6 TCP packets into captured traffic or pcap files to leak adjacent memory into reconstructed flow files or crash tcpflow.
Title tcpflow through 1.6.1 Out-of-Bounds Read via TCP Demultiplexer Payload Length
Weaknesses CWE-130
References
Metrics cvssV3_1

{'score': 4.8, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L'}

cvssV4_0

{'score': 6.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Nov 9, 2026, 7:18 PM
Reserved
Oct 30, 2026, 11:46 AM
Status
Awaiting Analysis
Published
Oct 30, 2026, 2:16 PM
Modified
Nov 9, 2026, 8:18 PM