VULNERABILITY INTELLIGENCE
CVE-2025-61661
CVSS score4.8 MEDIUM
EPSS probability0.21%
CISA KEVNot currently listed
Published2025-11-18
Last modified2026-10-18
CVSS vectorCVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
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.
Weakness classification
- CWE-131: Incorrect Calculation of Buffer Size