CVE-2025-4002 is a medium-severity vulnerability affecting RefindPlusRepo's RefindPlus boot manager version 0.14.2.AB. The issue resides in the GetDebugLogFile function within the Library/MemLogLib/BootLog.c source file, where improper handling leads to a null pointer dereference. This vulnerability can be triggered by a local attacker with limited privileges (local attack vector, low complexity) without requiring user interaction or elevated authentication. The null pointer dereference causes the affected process to crash, leading to denial of service conditions during the boot logging phase. While it does not directly compromise confidentiality or integrity, the availability impact is high as it can disrupt system boot logging functionality, potentially affecting system diagnostics or recovery processes. The vulnerability is patched in commit d2143a1e2deefddd9b105fb7160763c4f8d47ea2, and applying this patch is recommended to prevent exploitation. No known exploits are currently reported in the wild. Given the local attack requirement, exploitation is limited to scenarios where an attacker has local access, such as compromised user accounts or insider threats. The vulnerability does not require user interaction and does not affect confidentiality or integrity, but the denial of service impact on availability is significant in environments relying on RefindPlus for boot management and logging.

For European organizations, the primary impact of CVE-2025-4002 is the potential disruption of system boot processes and logging capabilities on systems using RefindPlus 0.14.2.AB. This can hinder incident response and forensic investigations by impairing boot log availability. Critical infrastructure, data centers, and enterprises relying on RefindPlus for multi-boot or custom boot environments may experience system downtime or degraded diagnostics, affecting operational continuity. Since exploitation requires local access, the threat is more relevant in environments with multiple users or where insider threats exist. The denial of service could also delay system recovery or troubleshooting, increasing downtime costs. However, the vulnerability does not enable privilege escalation or data compromise directly, limiting its impact to availability concerns. Organizations with strict uptime requirements or those using RefindPlus in embedded or specialized hardware should prioritize patching to maintain system reliability.

1. Apply the official patch identified by commit d2143a1e2deefddd9b105fb7160763c4f8d47ea2 immediately to affected RefindPlus installations. 2. Restrict local access to systems running RefindPlus to trusted personnel only, minimizing the risk of local exploitation. 3. Implement strict user account controls and monitoring to detect unauthorized local access attempts. 4. Use system integrity monitoring tools to detect abnormal crashes or boot log failures indicative of exploitation attempts. 5. For environments where patching is delayed, consider disabling or restricting the use of the GetDebugLogFile function if feasible, or configure boot logging to minimize exposure. 6. Incorporate RefindPlus version checks into vulnerability management and asset inventory processes to identify and remediate affected systems proactively. 7. Educate system administrators about the importance of securing local access and monitoring boot process anomalies related to this vulnerability.