CVE-2021-22156

CRITICAL
Published Aug 17, 20214y ago · Modified Jun 17, 20262w ago
9.8 CVSS 3.1
Critical
Find Similar
Published Aug 17, 2021 4y ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
9.8
Exploitability
3.9
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-190 Integer Overflow or Wraparound Numeric Error

Affected Products 5

VendorProductVersionRange
blackberryqnx_software_development_platform* <6.5.0
blackberryqnx_software_development_platform6.5.0any
blackberryqnx_software_development_platform6.5.0any
blackberryqnx_os_for_medical* ≤1.1.1
blackberryqnx_os_for_safety* ≤1.0.2

References 2

  • support.blackberry.com https://support.blackberry.com/kb/articleDetail?articleNumber=000082334
    PatchVendor Advisory
  • tools.cisco.com https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-qnx-TOxjVPdL
    Third Party Advisory

Remediation

  • support.blackberry.com https://support.blackberry.com/kb/articleDetail?articleNumber=000082334
    PatchVendor Advisory