CVE-2021-28041

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    CVE-2021-28041

    Published: 5 Mar 2021Last Modified: 8 Jul 2026

    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://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KQWGII3LQR4AOTPPFXGMTYE7UDEWIUKI/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TXST2CML2MWY3PNVUXX7FFJE3ATJMNVZ/, https://security.gentoo.org/glsa/202105-35, https://security.netapp.com/advisory/ntap-20210416-0002/, https://www.openssh.com/security.html, https://www.openssh.com/txt/release-8.5, https://www.oracle.com//security-alerts/cpujul2021.html, https://github.com/openssh/openssh-portable/commit/e04fd6dde16de1cdc5a4d9946397ff60d96568db, https://www.openwall.com/lists/oss-security/2021/03/03/1

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 8aa3455b16fddea4c0144a7c4a1edb10ec67dcc8
    Fixed -d2afd717e62d76bb41ab5f3ab4ce6f885c8edc98

    Affected versions

    V_8_4_P1

    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
    CVE-2021-28041 | CVE-DB