CVE-2021-22156

CRITICAL
9.8
CVSS Score
Published: August 17, 2021 at 06:35 PM UTC
Updated: June 17, 2026 at 03:36 AM UTC
3 products affected across 1 vendorQNX Software Development PlatformQNX OS for MedicalQNX OS for Safety

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Severity
CRITICAL9.8
Exploit prediction
EPSS 2%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v ≤ 1v ≤ 1.0.1v ≤ 1.1v ≤ 1.1.1
v ≤ 1v ≤ 1.0.1v ≤ 1.0.2v ≤ 1.1
v ≤ 1v ≤ 1.0.1v ≤ 1.1v < 6.5.06.5.06.5.0 sp1
Affected range stops below 6.5.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-190

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