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New Ubuntu Kernels Released to Fix Secure Boot Bypass and Other Flaws, Update Now

Submitted by Rianne Schestowitz on Wednesday 22nd of July 2020 11:38:45 AM Filed under
Security
Ubuntu

Available for Ubuntu 20.04 LTS (Focal Fossa), Ubuntu 18.04 LTS (Bionic Beaver), and Ubuntu 16.04 LTS (Xenial Xerus), the new Linux kernel updates are here to address two vulnerabilities (CVE-2019-20908 and CVE-2020-15780) discovered by Jason A. Donenfeld in the ACPI implementation, which could allow a privileged attacker to bypass Secure Boot lockdown restrictions and execute arbitrary code in the kernel.

CVE-2019-20908 affects the Linux 4.15 kernels in Ubuntu 18.04 LTS and Ubuntu 16.04.6 LTS systems, as well as the Linux 4.4 kernel of Ubuntu 16.04 LTS and Ubuntu 14.04 ESM systems. On the other hand, CVE-2020-15780 affects the Linux 5.4 kernels in Ubuntu 20.04 LTS and Ubuntu 18.04.3 LTS systems, as well as the Linux 4.15 kernel in Ubuntu 18.04 LTS and Ubuntu 16.04.6 LTS systems.

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