CVE-2021-22156: blackberry qnx_os_for_medical Integer Overflow or Wraparound

Vulnerability summary

CVE-2021-22156 is a critical (CVSS 9.8) Integer Overflow or Wraparound vulnerability in blackberry qnx_os_for_medical. EPSS estimates a 1.79% chance of exploitation in the next 30 days, higher than 78% of scored vulnerabilities.

Timeline

1. 17-08-2021
   PublishedVulnerability first disclosed.
2. 22-08-2025
   Last modifiedVulnerability information updated.

Description

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.

• CWE-190Integer Overflow or WraparoundThe product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.