CVE-2016-10196: Debian Linux

High severity, CVSS 7.5. EPSS: 5.2% chance of exploitation in the next 30 days.

Stack-based buffer overflow in the evutil_parse_sockaddr_port function in evutil.c in libevent before 2.1.6-beta allows attackers to cause a denial of service (segmentation fault) via vectors involving a long string in brackets in the ip_as_string argument.

Affected products

• Debian Debian Linux: version 8.0 only
• Libevent Project Libevent: up to and including 2.1.5
• Mozilla Firefox: before 45.9.0 (fixed in 45.9.0); before 53.0 (fixed in 53.0); version 52.0 only
• Mozilla Thunderbird: before 52.1.0 (fixed in 52.1.0)

Published 2017-03-15. Last modified 2026-06-17.