Integer Overflow Vulnerability in GRUB2 Affects Red Hat Products

CVE-2025-0678

What is CVE-2025-0678?

A flaw in GRUB2's squash4 filesystem module allows user-controlled parameters to affect buffer size calculations, risking integer overflows. An attacker can exploit this vulnerability by crafting a malicious filesystem, potentially leading to an out-of-bounds write during data reading. This exploitation could corrupt critical internal data and enable arbitrary code execution, thus bypassing secure boot protections.

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