CVE-2016-5423: Debian Linux

High severity, CVSS 8.3. EPSS: 6% chance of exploitation in the next 30 days.

PostgreSQL before 9.1.23, 9.2.x before 9.2.18, 9.3.x before 9.3.14, 9.4.x before 9.4.9, and 9.5.x before 9.5.4 allow remote authenticated users to cause a denial of service (NULL pointer dereference and server crash), obtain sensitive memory information, or possibly execute arbitrary code via (1) a CASE expression within the test value subexpression of another CASE or (2) inlining of an SQL function that implements the equality operator used for a CASE expression involving values of different types.

Affected products

• Debian Debian Linux: version 8.0 only
• PostgreSQL PostgreSQL: up to and including 9.1.22; version 9.2 only; version 9.2.1 only; version 9.2.2 only; version 9.2.3 only; version 9.2.4 only; …

Published 2016-12-09. Last modified 2026-06-17.