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CVE-2021-22156

Published: Aug 17, 2021Updated: Aug 22, 2025 Sources: CVE List NVD BDUCWE-190
9.0CRITICAL
NVD MITRE
EPSS Score
1.8%
Top 23.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not 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.

No summary for this CVE yet.

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

BlackBerry
commercial·CA
QNX Software Development Platform (SDP), QNX OS for Medical and QNX OS for SafetyOn-premOS
Operating Systems / rtos-embedded-os
qnx software development platformOn-premOS
Operating Systems / unix-bsd
qnx os for medicalEmbeddedOS
Operating Systems / rtos-embedded-os
qnx os for safetyEmbeddedOS
Operating Systems / rtos-embedded-os
BlackBerry Limited
commercialaka qnx momentics development suite, qnx, qnx sdp
QNXEmbedded
Operating Systems / rtos-embedded-os

Exploitability

Official Patch Available
Is your org exposed to CVE-2021-22156?We can run the check for you — a free external exposure review, no install. Check my exposure

Attack Graph

Products CVE Techniques Tactics

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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 →

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