CVE-2025-61661 – Grub2: out-of-bounds write

CVE ID : CVE-2025-61661

Published : Nov. 18, 2025, 6:20 p.m. | 44 minutes ago

Description : A vulnerability has been identified in the GRUB (Grand Unified Bootloader) component. This flaw occurs because the bootloader mishandles string conversion when reading information from a USB device, allowing an attacker to exploit inconsistent length values. A local attacker can connect a maliciously configured USB device during the boot sequence to trigger this issue. A successful exploitation may lead GRUB to crash, leading to a Denial of Service. Data corruption may be also possible, although given the complexity of the exploit the impact is most likely limited.

Severity: 4.8 | MEDIUM

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