UBUNTU-CVE-2025-11678

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    UBUNTU-CVE-2025-11678

    Published: 20 Oct 2025Last Modified: 22 Apr 2026
    Upstream:
    CVE-2025-11678
    Aliases:
    USN-8024-1

    Summary:

    Details: Stack-based Buffer Overflow in lws_adns_parse_label in warmcat libwebsockets allows, when the LWS_WITH_SYS_ASYNC_DNS flag is enabled during compilation, to overflow the label_stack, when the attacker is able to sniff a DNS request in order to craft a response with a matching id containing a label longer than the maximum.

    References: https://ubuntu.com/security/CVE-2025-11678, https://www.cve.org/CVERecord?id=CVE-2025-11678, https://libwebsockets.org/git/libwebsockets/commit?id=2bb9598562b37c942ba5b04bcde3f7fdf66a9d3a, https://www.nozominetworks.com/labs/vulnerability-advisories-cve-2025-11678, https://ubuntu.com/security/notices/USN-8024-1

    Affected packages

    Package

    Name: libwebsockets

    Purl: pkg:deb/ubuntu/[email protected]?arch=source&distro=jammy

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -4.0.20-2ubuntu1.1

    Affected versions

    4.0.20-2
    4.0.20-2ubuntu1

    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
    UBUNTU-CVE-2025-11678 | CVE-DB