CVE-2017-0898: Ruby-Lang Ruby

Critical severity, CVSS 9.1. EPSS: 9.7% chance of exploitation in the next 30 days.

Ruby before 2.4.2, 2.3.5, and 2.2.8 is vulnerable to a malicious format string which contains a precious specifier (*) with a huge minus value. Such situation can lead to a buffer overrun, resulting in a heap memory corruption or an information disclosure from the heap.

Affected products

• Ruby-Lang Ruby: version 2.2.0 only; version 2.2.1 only; version 2.2.2 only; version 2.2.3 only; version 2.2.4 only; version 2.2.5 only; …

Published 2017-09-15. Last modified 2026-06-17.