CVE-2017-9951: Memcached

High severity, CVSS 7.5. EPSS: 4.2% chance of exploitation in the next 30 days.

The try_read_command function in memcached.c in memcached before 1.4.39 allows remote attackers to cause a denial of service (segmentation fault) via a request to add/set a key, which makes a comparison between signed and unsigned int and triggers a heap-based buffer over-read. NOTE: this vulnerability exists because of an incomplete fix for CVE-2016-8705.

Affected products

• Memcached Memcached: up to and including 1.4.38

Published 2017-07-17. Last modified 2026-06-17.