CVE-2021-22156: Blackberry Qnx OS For Medical

Critical severity, CVSS 9.8. EPSS: 1.8% chance of exploitation in the next 30 days.

An integer overflow vulnerability in the calloc() function of the C runtime library of affected versions of BlackBerry® QNX Software Development Platform (SDP) version(s) 6.5.0SP1 and earlier, QNX OS for Medical 1.1 and earlier, and QNX OS for Safety 1.0.1 and earlier that could allow an attacker to potentially perform a denial of service or execute arbitrary code.

Affected products

• Blackberry Qnx OS For Medical: up to and including 1.1.1
• Blackberry Qnx OS For Safety: up to and including 1.0.2
• Blackberry Qnx Software Development Platform: before 6.5.0 (fixed in 6.5.0); version 6.5.0 only

Published 2021-08-17. Last modified 2026-06-17.