CVE-2012-2739: Oracle JDK

Medium severity, CVSS 5.0. EPSS: 3.2% chance of exploitation in the next 30 days.

Oracle Java SE before 7 Update 6, and OpenJDK 7 before 7u6 build 12 and 8 before build 39, computes hash values without restricting the ability to trigger hash collisions predictably, which allows context-dependent attackers to cause a denial of service (CPU consumption) via crafted input to an application that maintains a hash table.

Affected products

• Oracle JDK: up to and including 1.7.0; version 1.7.0 only
• Oracle JRE: up to and including 1.7.0; version 1.7.0 only
• Oracle Openjdk: up to and including 1.7.0; version 1.6.0 only; version 1.8.0 only

Published 2012-11-28. Last modified 2026-06-16.