CVE-2025-61661 — Grub2: grub2: out-of-bounds write via malicious usb device
A vulnerability has been identified in the GRUB (Grand Unified Bootloader) component. This flaw occurs because the bootloader mishandles string conversion when reading informati…
Published: 2025-11-18 · CVSS: 4.8 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7