CVE-2026-119600: medium-severity vulnerability in simsong tcpflow
tcpflow through 1.6.1 Out-of-Bounds Read via TCP Demultiplexer Payload Length
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.3epss 0.4%
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.
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
Affected products
simsong · tcpflowRelated CVEs — simsong tcpflow
In the same product, most dangerous first.
References
https://github.com/simsong/tcpflowhttps://github.com/simsong/tcpflow/blob/tcpflow-1.6.1/src/tcpdemux.cpp#L747https://github.com/simsong/tcpflow/blob/tcpflow-1.6.1/src/tcpdemux.cpp#L781https://github.com/simsong/tcpflow/issues/279https://hackmd.io/@haindpwn/tcpflow-ip-payload-length-oob-readhttps://www.vulncheck.com/advisories/tcpflow-through-1.6.1-out-of-bounds-read-via-tcp-demultiplexer-payload-length