UBUNTU-CVE-2021-28039

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    UBUNTU-CVE-2021-28039

    Published: 5 Mar 2021Last Modified: 24 Oct 2025
    Upstream:
    CVE-2021-28039

    Summary:

    Details: An issue was discovered in the Linux kernel 5.9.x through 5.11.3, as used with Xen. In some less-common configurations, an x86 PV guest OS user can crash a Dom0 or driver domain via a large amount of I/O activity. The issue relates to misuse of guest physical addresses when a configuration has CONFIG_XEN_UNPOPULATED_ALLOC but not CONFIG_XEN_BALLOON_MEMORY_HOTPLUG.

    References: https://ubuntu.com/security/CVE-2021-28039, https://xenbits.xen.org/xsa/advisory-369.html, http://www.openwall.com/lists/oss-security/2021/03/05/2, http://xenbits.xen.org/xsa/advisory-369.html, https://www.cve.org/CVERecord?id=CVE-2021-28039

    Affected packages

    Package

    Name: linux-hwe-edge

    Purl: pkg:deb/ubuntu/[email protected]~16.04.1?arch=source&distro=xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    4.8.0-28.30~16.04.1
    4.8.0-30.32~16.04.1
    4.8.0-32.34~16.04.1
    4.8.0-34.36~16.04.1

    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-2021-28039 | CVE-DB