CVE-2026-119600

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    CVE-2026-119600

    Published: 30 Oct 2026Last Modified: 11 Nov 2026

    Summary: tcpflow < 1.7.0 Out-of-Bounds Read via TCP Demultiplexer Payload Length

    Details: tcpflow before 1.7.0 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.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/119xxx/CVE-2026-119600.json, https://hackmd.io/@haindpwn/tcpflow-ip-payload-length-oob-read, https://nvd.nist.gov/vuln/detail/CVE-2026-119600, https://www.vulncheck.com/advisories/tcpflow-out-of-bounds-read-via-tcp-demultiplexer-payload-length, https://github.com/simsong/tcpflow/issues/279, https://github.com/simsong/tcpflow/pull/280, https://github.com/simsong/tcpflow/releases/tag/v1.7.0, 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

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -0c741151957b14260482d218134078a8d4186783

    Affected versions

    tcpflow-1.6.1

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-119600 | CVE-DB