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    CVE-2022-32296

    The Linux kernel before 5.17.9 allows TCP servers to identify clients by observing what source ports are used. This occurs because of use of Algorithm 4 ("Double-Hash Port Selection Algorithm") of RFC 6056.

    Published:May 5, 2022
    Last Modified:Oct 14, 2026
    EPS:Jun 5, 2022
    EPSS Score:0.00438
    CVSS Score:3.3

    Affected Products

    Vendor
    Linux
    Product
    Linux Kernel

    Exploits

    No exploit reference

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    References

    https://arxiv.org/abs/2209.12993
    https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.17.9
    https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4c2c8f03a5ab7cb04ec64724d7d176d00bcc91e5
    https://github.com/0xkol/rfc6056-device-tracker
    https://lists.debian.org/debian-lts-announce/2022/07/msg00000.html
    https://www.debian.org/security/2022/dsa-5173
    https://arxiv.org/abs/2209.12993
    https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.17.9
    https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4c2c8f03a5ab7cb04ec64724d7d176d00bcc91e5
    https://github.com/0xkol/rfc6056-device-tracker
    https://lists.debian.org/debian-lts-announce/2022/07/msg00000.html
    https://www.debian.org/security/2022/dsa-5173
    https://cert-portal.siemens.com/productcert/html/ssa-419740.html
    https://cert-portal.siemens.com/productcert/html/ssa-794697.html

    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