CVE-2021-41690: Offis Dcmtk

High severity, CVSS 7.5. EPSS: 1.8% chance of exploitation in the next 30 days.

DCMTK through 3.6.6 does not handle memory free properly. The malloced memory for storing all file information are recorded in a global variable LST and are not freed properly. Sending specific requests to the dcmqrdb program can incur a memory leak. An attacker can use it to launch a DoS attack.

Affected products

• Offis Dcmtk: up to and including 3.6.6

Published 2022-06-28. Last modified 2026-06-17.