UBUNTU-CVE-2026-103963

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    UBUNTU-CVE-2026-103963

    Published: 30 Oct 2026Last Modified: 5 Nov 2026
    Upstream:
    CVE-2026-103963

    Summary:

    Details: A flaw was found in glib-networking. When establishing connections using Transport Layer Security (TLS) version 1.3, the client-side session cache does not limit the number of session tickets retained for a single host. A malicious server can exploit this by sending excessive session ticket messages, causing the client application to continuously consume memory. This unbounded memory growth can exhaust system memory, resulting in a Denial of Service (DoS).

    References: https://ubuntu.com/security/CVE-2026-103963, https://www.cve.org/CVERecord?id=CVE-2026-103963, https://access.redhat.com/security/cve/CVE-2026-103963, https://bugzilla.redhat.com/show_bug.cgi?id=2465656, https://gitlab.gnome.org/GNOME/glib-networking/-/merge_requests/288

    Affected packages

    Package

    Name: glib-networking

    Purl: pkg:deb/ubuntu/glib-networking?arch=source&distro=xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    2.46.0-1
    2.46.1-1
    2.46.1-1build1

    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-2026-103963 | CVE-DB