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CVE-2026-119600medium6.3

tcpflow through 1.6.1 Out-of-Bounds Read via TCP Demultiplexer Payload Length

Impact

tcpflow versions up to 1.6.1 have an out-of-bounds read vulnerability, allowing unauthenticated attackers to read process memory by sending crafted TCP packets. This can leak adjacent memory or crash tcpflow. Attackers can inject packets into captured traffic or pcap files.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

simsong · VulnCheck

tcpflow

1 range
VulnCheck version evidence

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affected

0 → through 1.6.1

semver versions

unaffected

unknown

Other versions: unaffected

Original source 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.

Inside the record

Evidence available

Package identity · not supplied
Version evidence
Remediation guidance · not supplied
Weakness classification
Additional publishers · not supplied

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-119600

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-130 ↗

Improper Handling of Length Parameter Inconsistency

VulnCheck

Related →
Contributing organizations · 1
VulnCheck

Assigning organization

2026-10-30

What changed

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Large field values are marked as truncated previews. Original source snapshots remain retained.

References

6 sources
github.com/simsong/tcpflow/issues/279
issue-trackingVulnCheck
github.com/simsong/tcpflow/blob/tcpflow-1.6.1/src/tcpdemux.cpp
technical-descriptionVulnCheck
github.com/simsong/tcpflow/blob/tcpflow-1.6.1/src/tcpdemux.cpp
technical-descriptionVulnCheck
hackmd.io/@haindpwn/tcpflow-ip-payload-length-oob-read
third-party-advisoryVulnCheck
github.com/simsong/tcpflow
productVulnCheck
www.vulncheck.com/advisories/tcpflow-through-1.6.1-out-of-bounds-read-via-tcp-demultiplexer-payload-length
third-party-advisoryVulnCheck