USN-5071-1

    Dashboard / Vulnerabilities / USN-5071-1

    USN-5071-1

    Published: 8 Sept 2021Last Modified: 3 Jun 2026

    Summary: linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-gke, linux-gke-5.4, linux-gkeop, linux-gkeop-5.4, linux-kvm, linux-oracle, linux-oracle-5.4 vulnerabilities

    Details: Maxim Levitsky and Paolo Bonzini discovered that the KVM hypervisor implementation for AMD processors in the Linux kernel allowed a guest VM to disable restrictions on VMLOAD/VMSAVE in a nested guest. An attacker in a guest VM could use this to read or write portions of the host's physical memory. (CVE-2021-3656) Maxim Levitsky discovered that the KVM hypervisor implementation for AMD processors in the Linux kernel did not properly prevent a guest VM from enabling AVIC in nested guest VMs. An attacker in a guest VM could use this to write to portions of the host's physical memory. (CVE-2021-3653) It was discovered that the KVM hypervisor implementation for AMD processors in the Linux kernel did not ensure enough processing time was given to perform cleanups of large SEV VMs. A local attacker could use this to cause a denial of service (soft lockup). (CVE-2020-36311) It was discovered that the KVM hypervisor implementation in the Linux kernel did not properly perform reference counting in some situations, leading to a use-after-free vulnerability. An attacker who could start and control a VM could possibly use this to expose sensitive information or execute arbitrary code. (CVE-2021-22543) Murray McAllister discovered that the joystick device interface in the Linux kernel did not properly validate data passed via an ioctl(). A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code on systems with a joystick device registered. (CVE-2021-3612)

    References: https://ubuntu.com/security/notices/USN-5071-1, https://ubuntu.com/security/CVE-2020-36311, https://ubuntu.com/security/CVE-2021-3612, https://ubuntu.com/security/CVE-2021-3653, https://ubuntu.com/security/CVE-2021-3656, https://ubuntu.com/security/CVE-2021-22543

    Affected packages

    Package

    Name: linux-aws-5.4

    Purl: pkg:deb/ubuntu/linux-aws-5.4?arch=source&distro=bionic

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -5.4.0-1056.59~18.04.1

    Affected versions

    5.4.0-1018.18~18.04.1
    5.4.0-1020.20~18.04.2
    5.4.0-1022.22~18.04.1
    5.4.0-1024.24~18.04.1
    5.4.0-1025.25~18.04.1
    5.4.0-1028.29~18.04.1
    5.4.0-1029.30~18.04.1
    5.4.0-1030.31~18.04.1
    5.4.0-1032.33~18.04.1
    5.4.0-1034.35~18.04.1
    5.4.0-1035.37~18.04.1
    5.4.0-1037.39~18.04.1
    5.4.0-1038.40~18.04.1
    5.4.0-1039.41~18.04.1
    5.4.0-1041.43~18.04.1
    5.4.0-1043.45~18.04.1
    5.4.0-1045.47~18.04.1
    5.4.0-1047.49~18.04.1
    5.4.0-1048.50~18.04.1
    5.4.0-1049.51~18.04.1
    5.4.0-1051.53~18.04.1
    5.4.0-1054.57~18.04.1
    5.4.0-1055.58~18.04.1

    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
    USN-5071-1 | CVE-DB