UBUNTU-CVE-2020-25637

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    UBUNTU-CVE-2020-25637

    Published: 6 Oct 2020Last Modified: 20 Aug 2026
    Upstream:
    CVE-2020-25637
    Aliases:
    USN-5399-1

    Summary:

    Details: A double free memory issue was found to occur in the libvirt API, in versions before 6.8.0, responsible for requesting information about network interfaces of a running QEMU domain. This flaw affects the polkit access control driver. Specifically, clients connecting to the read-write socket with limited ACL permissions could use this flaw to crash the libvirt daemon, resulting in a denial of service, or potentially escalate their privileges on the system. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

    References: https://ubuntu.com/security/CVE-2020-25637, https://ubuntu.com/security/notices/USN-5399-1, https://www.cve.org/CVERecord?id=CVE-2020-25637

    Affected packages

    Package

    Name: libvirt

    Purl: pkg:deb/ubuntu/libvirt?arch=source&distro=esm-infra-legacy%2Ftrusty

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    1.1.1-0ubuntu8
    1.1.1-0ubuntu9
    1.1.4-0ubuntu2
    1.1.4-0ubuntu3
    1.1.4-0ubuntu4
    1.1.4-0ubuntu5

    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-2020-25637 | CVE-DB