CVE-2018-1000115: Canonical Ubuntu Linux

High severity, CVSS 7.5. EPSS: 88.1% chance of exploitation in the next 30 days.

Memcached version 1.5.5 contains an Insufficient Control of Network Message Volume (Network Amplification, CWE-406) vulnerability in the UDP support of the memcached server that can result in denial of service via network flood (traffic amplification of 1:50,000 has been reported by reliable sources). This attack appear to be exploitable via network connectivity to port 11211 UDP. This vulnerability appears to have been fixed in 1.5.6 due to the disabling of the UDP protocol by default.

Affected products

• Canonical Ubuntu Linux: version 14.04 only; version 16.04 only; version 17.10 only
• Debian Debian Linux: version 8.0 only; version 9.0 only
• Memcached Memcached: version 1.5.5 only
• Red Hat Openstack: version 8 only; version 9 only; version 10 only; version 11 only; version 12 only

Published 2018-03-05. Last modified 2026-06-17.