CVE-2021-22156

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.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.89% Top 30%
Vendor Advisory cisco.com Vendor Advisory blackberry.com
Affected: n/a BlackBerry QNX Software Development Platform (SDP), QNX OS for Medical and QNX OS for Safety
Published at:
Updated at:

References

Link Tags
https://support.blackberry.com/kb/articleDetail?articleNumber=000082334 patch vendor advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-qnx-TOxjVPdL third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-22156?
CVE-2021-22156 has been scored as a critical severity vulnerability.
How to fix CVE-2021-22156?
To fix CVE-2021-22156, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-22156 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-22156 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-22156?
CVE-2021-22156 affects n/a BlackBerry QNX Software Development Platform (SDP), QNX OS for Medical and QNX OS for Safety.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.