CVE-2026-119600
tcpflow through 1.6.1 Out-of-Bounds Read via TCP Demultiplexer Payload Length
- State
- Published
- Severity
- 6.3 Medium
- Published
- Oct 30, 2026
- Updated
- Oct 30, 2026
- Reserved
- Oct 30, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.3 Medium | 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 | VulnCheck |
| 3.1 | 4.8 Medium | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L | VulnCheck |
Weaknesses
- CWE-130 Improper Handling of Length Parameter Inconsistency
Affected Products
| Product | Versions |
|---|---|
tcpflowsimsong |
|
References
- https://github.com/simsong/tcpflow/issues/279issue-tracking
- https://github.com/simsong/tcpflow/blob/tcpflow-1.6.1/src/tcpdemux.cpp#L781technical-description
- https://github.com/simsong/tcpflow/blob/tcpflow-1.6.1/src/tcpdemux.cpp#L747technical-description
- https://hackmd.io/@haindpwn/tcpflow-ip-payload-length-oob-readthird-party-advisory
- https://github.com/simsong/tcpflowproduct
- VulnCheck Advisory: tcpflow through 1.6.1 Out-of-Bounds Read via TCP Demultiplexer Payload Lengththird-party-advisory
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