CVE-2016-6489: Canonical Ubuntu Linux

High severity, CVSS 7.5. EPSS: 5% chance of exploitation in the next 30 days.

The RSA and DSA decryption code in Nettle makes it easier for attackers to discover private keys via a cache side channel attack.

Affected products

• Canonical Ubuntu Linux: version 12.04 only; version 14.04 only; version 16.04 only; version 16.10 only
• Nettle Project Nettle: before 3.3 (fixed in 3.3)
• Red Hat Enterprise Linux Desktop: version 7.0 only
• Red Hat Enterprise Linux Hpc Node: version 7.0 only
• Red Hat Enterprise Linux Server: version 7.0 only
• Red Hat Enterprise Linux Workstation: version 7.0 only

Published 2017-04-14. Last modified 2026-06-17.