CVE-2016-2338: Debian Linux

Critical severity, CVSS 9.8. EPSS: 4.7% chance of exploitation in the next 30 days.

An exploitable heap overflow vulnerability exists in the Psych::Emitter start_document function of Ruby. In Psych::Emitter start_document function heap buffer "head" allocation is made based on tags array length. Specially constructed object passed as element of tags array can increase this array size after mentioned allocation and cause heap overflow.

Affected products

• Debian Debian Linux: version 8.0 only
• Ruby-Lang Ruby: version 2.2.2 only; version 2.3.0 only

Published 2022-09-29. Last modified 2026-06-17.