UBUNTU-CVE-2021-4158

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    UBUNTU-CVE-2021-4158

    Published: 24 Dec 2021Last Modified: 4 Feb 2026
    Upstream:
    CVE-2021-4158
    Aliases:
    USN-5307-1

    Summary:

    Details: A NULL pointer dereference issue was found in the ACPI code of QEMU. A malicious, privileged user within the guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition.

    References: https://ubuntu.com/security/CVE-2021-4158, https://lists.nongnu.org/archive/html/qemu-devel/2021-12/msg03692.html, https://www.mail-archive.com/[email protected]/msg857944.html, https://ubuntu.com/security/notices/USN-5307-1, https://www.cve.org/CVERecord?id=CVE-2021-4158

    Affected packages

    Package

    Name: qemu

    Purl: pkg:deb/ubuntu/qemu@1:6.2+dfsg-2ubuntu5?arch=source&distro=jammy

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1:6.2+dfsg-2ubuntu5

    Affected versions

    1:6.0+dfsg-2expubuntu1

    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-2021-4158 | CVE-DB