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    CVE-2021-22156

    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.

    Published:Aug 17, 2021
    Last Modified:Aug 22, 2025
    EPS:Aug 17, 2021
    EPSS Score:0.00654
    CVSS Score:9

    Affected Products

    Vendor
    Blackberry
    Product
    Qnx Os For Medical
    Vendor
    Blackberry
    Product
    Qnx Os For Safety
    Vendor
    Blackberry
    Product
    Qnx Software Development Platform

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-190 Integer Overflow or Wraparound

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-92 Forced Integer Overflow

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High