UBUNTU-CVE-2021-28041

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    UBUNTU-CVE-2021-28041

    Published: 5 Mar 2021Last Modified: 4 Feb 2026
    Upstream:
    CVE-2021-28041
    Aliases:
    USN-4762-1

    Summary:

    Details: ssh-agent in OpenSSH before 8.5 has a double free that may be relevant in a few less-common scenarios, such as unconstrained agent-socket access on a legacy operating system, or the forwarding of an agent to an attacker-controlled host.

    References: https://ubuntu.com/security/CVE-2021-28041, https://www.openwall.com/lists/oss-security/2021/03/03/1, https://www.openssh.com/security.html, https://www.openssh.com/txt/release-8.5, https://ubuntu.com/security/notices/USN-4762-1, https://www.cve.org/CVERecord?id=CVE-2021-28041

    Affected packages

    Package

    Name: openssh

    Purl: pkg:deb/ubuntu/openssh@1:8.2p1-4ubuntu0.2?arch=source&distro=focal

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1:8.2p1-4ubuntu0.2

    Affected versions

    1:8.0p1-6build1

    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-2021-28041 | CVE-DB