CVE-2025-0624: 
Alma Linux vulnerability analysis and mitigation

A vulnerability (CVE-2025-0624) was discovered in GRUB2 affecting the network boot process. The flaw was disclosed on February 18, 2025, and impacts the GRUB bootloader's network configuration file handling functionality. During the network boot process, when searching for the configuration file, GRUB copies data from a user-controlled environment variable into an internal buffer using the grub_strcpy() function without properly validating the buffer size (OSS Security).

The vulnerability occurs when GRUB fails to consider the environment variable length when allocating the internal buffer during the network boot process, resulting in an out-of-bounds write in the grubnetsearchconfigfile() function. The issue has been assigned a CVSS v3.1 base score of 7.5 (High) with the vector string AV:A/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H, indicating that exploitation requires network adjacency and high privileges but no user interaction (OSS Security).

If successfully exploited, this vulnerability could result in remote code execution through the same network segment where GRUB is searching for boot information. This could potentially be used to bypass secure boot protections, compromising the system's boot integrity (Ubuntu Security).

Multiple vendors have released security updates to address this vulnerability. Red Hat has released patches for various versions of Enterprise Linux including 8.2, 8.4, 8.6, 8.8, 9.0, and 9.4. Users are strongly advised to update their GRUB2 packages to the latest versions available through their distribution's security updates (Red Hat Errata).