tcpflow through 1.6.1 contains an out-of-bounds read vulnerability that allows unauthenticated attackers to read process memory by sending…
CVE-2026-119600
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.
Assessment
- CVSS
- 6.3 (v4.0)
- Severity
- Medium
- Known exploited
- Not listed in CISA KEV
- Exploit availability
- Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
- Published
- 30 October 2026
- Last updated
- 30 October 2026
- Weakness
- CWE-130
- Assigner
- disclosure@vulncheck.com
CVSS vectorCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
At the source
References
- https://github.com/simsong/tcpflow
- https://github.com/simsong/tcpflow/blob/tcpflow-1.6.1/src/tcpdemux.cpp#L747
- https://github.com/simsong/tcpflow/blob/tcpflow-1.6.1/src/tcpdemux.cpp#L781
- https://github.com/simsong/tcpflow/issues/279
- https://hackmd.io/@haindpwn/tcpflow-ip-payload-length-oob-read
- https://www.vulncheck.com/advisories/tcpflow-through-1.6.1-out-of-bounds-read-via-tcp-demultiplexer-payload-length
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