UBUNTU-CVE-2026-102556

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    UBUNTU-CVE-2026-102556

    Published: 29 Sept 2026Last Modified: 4 Nov 2026
    Upstream:
    CVE-2026-102556
    Aliases:
    USN-8975-1

    Summary:

    Details: A flaw was found in libsoup. When handling an incoming WebSocket Pong frame, SoupWebsocketConnection emitted the ::pong signal with a GByteArray pointer even though the signal is declared to pass a GBytes. Applications connecting a handler that follows the documented GBytes API can trigger heap corruption or a crash upon receiving a crafted Pong.

    References: https://ubuntu.com/security/CVE-2026-102556, https://www.cve.org/CVERecord?id=CVE-2026-102556, https://bugzilla.redhat.com/show_bug.cgi?id=2543229, https://gitlab.gnome.org/GNOME/libsoup/-/work_items/554, https://access.redhat.com/security/cve/CVE-2026-102556, https://ubuntu.com/security/notices/USN-8975-1

    Affected packages

    Package

    Name: libsoup2.4

    Purl: pkg:deb/ubuntu/libsoup2.4?arch=source&distro=esm-infra%2Fbionic

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -2.62.1-1ubuntu0.4+esm10

    Affected versions

    2.60.1-1
    2.60.2-1
    2.60.2-2
    2.60.3-1

    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
    UBUNTU-CVE-2026-102556 | CVE-DB