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CVE-2021-22156

Published: Aug 17, 2021Updated: Aug 22, 2025 Sources: CVE List NVD BDUCWE-190
NVD MITRE
9.0CVSSCRITICAL
EPSS Score
1.8%
Top 24.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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 Vector Breakdown

AV:NAC:HPR:NUI:NS:CC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-190

Affected Products

QNX Software Development Platform (SDP), QNX OS for Medical and QNX OS for SafetyBlackBerry
Embedded
Operating Systems / rtos-embedded-os
qnx software development platformblackberry
On-premOS
Operating Systems / unix-bsd
qnx os for medicalblackberry
Embedded
Operating Systems / rtos-embedded-os
qnx os for safetyblackberry
Embedded
Operating Systems / rtos-embedded-os
QNXBlackBerry Limited
Embedded
Operating Systems / rtos-embedded-os
blackberrycommercialCAOperating Systemsaka blackberry
blackberry limitedcommercialOperating Systemsaka qnx sdp, qnx momentics development suite, qnx

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Initial Access
View detailed technique mapping

References

https://support.blackberry.com/kb/articleDetail?articleNumber=000082334
support.blackberry.com
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-qnx-TOxjVPdL
tools.cisco.com
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-qnx-TOxjVPdL
tools.cisco.com
and 2 more references View all →

Timeline

Published
Aug 17, 2021
Last Updated
Aug 22, 2025

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