CVE-2019-14558: 
Linux Debian vulnerability analysis and mitigation

Insufficient control flow management in BIOS firmware for 8th, 9th, 10th Generation Intel(R) Core(TM), Intel(R) Celeron(R) Processor 4000 & 5000 Series Processors was identified as CVE-2019-14558. The vulnerability was discovered and assigned on August 3, 2019, affecting various Intel processor generations and their BIOS firmware implementations (MITRE CVE).

The vulnerability has been assessed with a CVSS 3.1 Base Score of 5.7 (Medium severity). The attack vector is adjacent, requiring low attack complexity and low privileges, with no user interaction needed. While the vulnerability doesn't impact confidentiality or integrity, it can significantly affect system availability (Ubuntu Security).

When exploited, this vulnerability allows an authenticated user to potentially enable denial of service through adjacent access. The impact is primarily focused on system availability, with no direct effects on system confidentiality or integrity (Intel Advisory).

Various operating system vendors have released patches to address this vulnerability. Ubuntu has fixed the issue in versions 19.10, 18.04 LTS, and 16.04 LTS. Debian has also addressed this vulnerability in their security update DLA 2645-1 for the edk2 package (Ubuntu Security, Debian LTS).