CVE-2018-0737: Canonical Ubuntu Linux

Medium severity, CVSS 5.9. EPSS: 11.6% chance of exploitation in the next 30 days.

The OpenSSL RSA Key generation algorithm has been shown to be vulnerable to a cache timing side channel attack. An attacker with sufficient access to mount cache timing attacks during the RSA key generation process could recover the private key. Fixed in OpenSSL 1.1.0i-dev (Affected 1.1.0-1.1.0h). Fixed in OpenSSL 1.0.2p-dev (Affected 1.0.2b-1.0.2o).

Affected products

• Canonical Ubuntu Linux: version 14.04 only; version 16.04 only; version 17.10 only
• OpenSSL OpenSSL: from 1.0.2b, up to and including 1.0.2o; from 1.1.0, up to and including 1.1.0h

Published 2018-04-16. Last modified 2026-06-17.