UBUNTU-CVE-2020-36311

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    UBUNTU-CVE-2020-36311

    Published: 7 Apr 2021Last Modified: 9 Sept 2026
    Upstream:
    CVE-2020-36311

    Summary:

    Details: An issue was discovered in the Linux kernel before 5.9. arch/x86/kvm/svm/sev.c allows attackers to cause a denial of service (soft lockup) by triggering destruction of a large SEV VM (which requires unregistering many encrypted regions), aka CID-7be74942f184.

    References: https://ubuntu.com/security/CVE-2020-36311, https://git.kernel.org/linus/7be74942f184fdfba34ddd19a0d995deb34d4a03, https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.9, https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7be74942f184fdfba34ddd19a0d995deb34d4a03, https://ubuntu.com/security/notices/USN-5071-1, https://ubuntu.com/security/notices/USN-5071-2, https://ubuntu.com/security/notices/USN-5120-1, https://www.cve.org/CVERecord?id=CVE-2020-36311

    Affected packages

    Package

    Name: linux-hwe-edge

    Purl: pkg:deb/ubuntu/linux-hwe-edge?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-2020-36311 | CVE-DB