USN-4426-1

    Dashboard / Vulnerabilities / USN-4426-1

    USN-4426-1

    Published: 27 Jul 2020Last Modified: 3 Jun 2026

    Summary: linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-gcp, linux-gcp-4.15, linux-gke-4.15, linux-hwe, linux-kvm, linux-oem, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities

    Details: Jason A. Donenfeld discovered that the ACPI implementation in the Linux kernel did not properly restrict loading SSDT code from an EFI variable. A privileged attacker could use this to bypass Secure Boot lockdown restrictions and execute arbitrary code in the kernel. (CVE-2019-20908) Fan Yang discovered that the mremap implementation in the Linux kernel did not properly handle DAX Huge Pages. A local attacker with access to DAX storage could use this to gain administrative privileges. (CVE-2020-10757) Mauricio Faria de Oliveira discovered that the aufs implementation in the Linux kernel improperly managed inode reference counts in the vfsub_dentry_open() method. A local attacker could use this vulnerability to cause a denial of service. (CVE-2020-11935) Jason A. Donenfeld discovered that the ACPI implementation in the Linux kernel did not properly restrict loading ACPI tables via configfs. A privileged attacker could use this to bypass Secure Boot lockdown restrictions and execute arbitrary code in the kernel. (CVE-2020-15780)

    References: https://ubuntu.com/security/notices/USN-4426-1, https://ubuntu.com/security/CVE-2019-20908, https://ubuntu.com/security/CVE-2020-10757, https://ubuntu.com/security/CVE-2020-11935, https://ubuntu.com/security/CVE-2020-15780

    Affected packages

    Package

    Name: linux-aws-hwe

    Purl: pkg:deb/ubuntu/linux-aws-hwe?arch=source&distro=xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -4.15.0-1079.83~16.04.1

    Affected versions

    4.15.0-1030.31~16.04.1
    4.15.0-1031.33~16.04.1
    4.15.0-1032.34~16.04.1
    4.15.0-1033.35~16.04.1
    4.15.0-1035.37~16.04.1
    4.15.0-1036.38~16.04.1
    4.15.0-1039.41~16.04.1
    4.15.0-1040.42~16.04.1
    4.15.0-1041.43~16.04.1
    4.15.0-1043.45~16.04.1
    4.15.0-1044.46~16.04.1
    4.15.0-1045.47~16.04.1
    4.15.0-1047.49~16.04.1
    4.15.0-1048.50~16.04.1
    4.15.0-1050.52~16.04.1
    4.15.0-1051.53~16.04.1
    4.15.0-1052.54~16.04.1
    4.15.0-1054.56~16.04.1
    4.15.0-1056.58~16.04.1
    4.15.0-1057.59~16.04.1
    4.15.0-1058.60~16.04.1
    4.15.0-1060.62~16.04.1
    4.15.0-1063.67~16.04.1
    4.15.0-1065.69~16.04.1
    4.15.0-1066.70~16.04.1
    4.15.0-1067.71~16.04.1
    4.15.0-1073.77~16.04.1
    4.15.0-1074.78~16.04.1

    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
    USN-4426-1 | CVE-DB