CVE-2026-119600

6.3 medium

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.

Severity

CVSS 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

CVSS 3.1

4.8 medium

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L

CWE: CWE-130
Published: 2026-10-30
Modified: 2026-10-30
Record from: the NVD, synced 2026-10-30

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

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