CVE-2016-6313: Canonical Ubuntu Linux

Medium severity, CVSS 5.3. EPSS: 3.6% chance of exploitation in the next 30 days.

The mixing functions in the random number generator in Libgcrypt before 1.5.6, 1.6.x before 1.6.6, and 1.7.x before 1.7.3 and GnuPG before 1.4.21 make it easier for attackers to obtain the values of 160 bits by leveraging knowledge of the previous 4640 bits.

Affected products

• Canonical Ubuntu Linux: version 12.04 only; version 14.04 only; version 16.04 only
• Debian Debian Linux: version 8.0 only
• Gnupg Gnupg: up to and including 1.4.14
• Gnupg Libgcrypt: up to and including 1.5.3; version 1.6.0 only; version 1.6.1 only; version 1.6.2 only; version 1.6.3 only; version 1.6.4 only; …

Published 2016-12-13. Last modified 2026-06-17.