UBUNTU-CVE-2026-121400

    Dashboard / Vulnerabilities / UBUNTU-CVE-2026-121400

    UBUNTU-CVE-2026-121400

    Published: 3 Nov 2026Last Modified: 5 Nov 2026
    Upstream:
    CVE-2026-121400

    Summary:

    Details: FreeRDP before 3.32.2 contains a denial-of-service vulnerability in rdg_process_control_packet that allows a malicious RD Gateway to exhaust client CPU by sending an incomplete keepalive control packet. Attackers completing the RDG tunnel-open exchange then send an eight-byte header with packetLength 0xFFFF and withhold the body, causing an unbounded no-progress read loop that spins one client thread at full CPU.

    References: https://ubuntu.com/security/CVE-2026-121400, https://www.cve.org/CVERecord?id=CVE-2026-121400, https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-x4x6-2hrm-hvq9, https://www.vulncheck.com/advisories/freerdp-before-3.32.2-cpu-exhaustion-via-rdg-control-packet

    Affected packages

    Package

    Name: freerdp

    Purl: pkg:deb/ubuntu/freerdp?arch=source&distro=xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1
    1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.2
    1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.3
    1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4

    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-2026-121400 | CVE-DB