CVE-2015-3281: Canonical Ubuntu Linux

Medium severity, CVSS 5.0. EPSS: 4.4% chance of exploitation in the next 30 days.

The buffer_slow_realign function in HAProxy 1.5.x before 1.5.14 and 1.6-dev does not properly realign a buffer that is used for pending outgoing data, which allows remote attackers to obtain sensitive information (uninitialized memory contents of previous requests) via a crafted request.

Affected products

• Canonical Ubuntu Linux: version 14.10 only; version 15.04 only
• Debian Debian Linux: version 8.0 only
• Haproxy Haproxy: version 1.5 only; version 1.5.0 only; version 1.5.1 only; version 1.5.2 only; version 1.5.3 only; version 1.5.4 only; …
• Opensuse Openstack Cloud: version 5 only
• Opensuse Opensuse: version 13.2 only
• Red Hat Enterprise Linux Desktop: version 7.0 only
• Red Hat Enterprise Linux Server: version 7.0 only
• Red Hat Enterprise Linux Server Aus: version 7.3 only; version 7.4 only; version 7.6 only
• Red Hat Enterprise Linux Server Eus: version 7.1 only; version 7.2 only; version 7.3 only; version 7.4 only; version 7.5 only; version 7.6 only
• Red Hat Enterprise Linux Server Tus: version 7.3 only; version 7.6 only
• Red Hat Enterprise Linux Workstation: version 7.0 only
• Suse Linux Enterprise High Availability Extension: version 12 only

Published 2015-07-06. Last modified 2026-06-17.