CVE-2026-97631 Vulnerability in EDK2 Firmware

EDK2 contains a vulnerability in BIOS (CVE-2026-97631) where a user may cause out-of-bounds write, classic buffer overflow, and incorrect calculation of buffer size by remote access. Successful exploitation of this vulnerability can lead to arbitrary code execution and could impact confidentiality, integrity, and availability of systems.

The vulnerability has a critical severity with a CVSS score of 9.5. It was officially published on October 22, 2026. Signals have been observed on GitHub and Twitter, with 53 posts in the last 24 hours and a total of 100 interactions. These signals indicate growing interest from the security community regarding this vulnerability.

For defense, it is crucial to closely monitor EDK2 firmware updates and apply patches as soon as they become available. It is also recommended to implement strict access controls to limit remote access to BIOS systems. Organizations should also consider implementing security solutions that can detect and prevent attempts to exploit this vulnerability.