CVE-2018-10846: Canonical Ubuntu Linux

Medium severity, CVSS 5.6. EPSS: 0.4% chance of exploitation in the next 30 days.

A cache-based side channel in GnuTLS implementation that leads to plain text recovery in cross-VM attack setting was found. An attacker could use a combination of "Just in Time" Prime+probe attack in combination with Lucky-13 attack to recover plain text using crafted packets.

Affected products

• Canonical Ubuntu Linux: version 16.04 only; version 18.04 only; version 18.10 only; version 19.04 only
• Debian Debian Linux: version 8.0 only
• Fedoraproject Fedora: version 31 only; version 32 only
• GNU Gnutls: before 3.6.12 (fixed in 3.6.12)
• Red Hat Enterprise Linux Desktop: version 7.0 only
• Red Hat Enterprise Linux Server: version 7.0 only
• Red Hat Enterprise Linux Workstation: version 7.0 only

Published 2018-08-22. Last modified 2026-06-17.