CVE-2026-16241

Name of the Vulnerable Software and Affected Versions PostgreSQL versions prior to 18.5 PostgreSQL versions prior to 17.11 PostgreSQL versions prior to 16.15 PostgreSQL versions prior to 15.19 PostgreSQL versions prior to 14.24

Description An integer underflow in the ECPG client allows a database server administrator to cause a temporary denial of service by sending a bytea value that lacks the mandatory prefix. This causes the client to overwrite a large memory region with bytes outside the attacker's control, typically resulting in a SIGSEGV (segmentation fault), which is a specific error that occurs when a program attempts to access a memory location it is not allowed to access. In rare instances, this could lead to an integrity impact on the client.

Recommendations Update to version 18.5 or later. Update to version 17.11 or later. Update to version 16.15 or later. Update to version 15.19 or later. Update to version 14.24 or later.