CVE-2020-15707

CVE-2020-15707 describes integer overflows in GRUB2's efilinux component (version 2.04 and prior), specifically in the grub_cmd_initrd and grub_initrd_init functions. This vulnerability, affecting Debian, Red Hat, and Ubuntu distributions, can lead to a heap-based buffer overflow. An attacker could exploit this to execute arbitrary code and bypass UEFI Secure Boot restrictions, potentially through a large number of initrd arguments on 32-bit systems or crafted large files on any architecture. The vulnerability has a CVSS score of 6.4 (Medium), indicating a local attack vector with high attack complexity, requiring high privileges to exploit, but resulting in high impact to confidentiality, integrity, and availability. Despite its potential impact, there is currently no evidence of active exploitation, and no public exploit code (Metasploit, Nuclei, ExploitDB) is available. Community discussion and media coverage for this CVE are minimal, suggesting a low level of public attention.