CVE-2015-8370: Fedoraproject Fedora

High severity, CVSS 7.4. EPSS: 1.1% chance of exploitation in the next 30 days.

Multiple integer underflows in Grub2 1.98 through 2.02 allow physically proximate attackers to bypass authentication, obtain sensitive information, or cause a denial of service (disk corruption) via backspace characters in the (1) grub_username_get function in grub-core/normal/auth.c or the (2) grub_password_get function in lib/crypto.c, which trigger an "Off-by-two" or "Out of bounds overwrite" memory error.

Affected products

• Fedoraproject Fedora: version 23 only
• GNU GRUB2: version 1.98 only; version 1.99 only; version 2.00 only; version 2.01 only; version 2.02 only

Published 2015-12-16. Last modified 2026-06-17.