CVE-2021-32025 in QNX Neutrino Kernel
Summary
by MITRE • 03/10/2022
An elevation of privilege vulnerability in the QNX Neutrino Kernel of affected versions of QNX Software Development Platform version(s) 6.4.0 to 7.0, QNX Momentics all 6.3.x versions, QNX OS for Safety versions 1.0.0 to 1.0.2, QNX OS for Safety versions 2.0.0 to 2.0.1, QNX for Medical versions 1.0.0 to 1.1.1, and QNX OS for Medical version 2.0.0 could allow an attacker to potentially access data, modify behavior, or permanently crash the system.
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Analysis
by VulDB Data Team • 08/22/2025
The vulnerability CVE-2021-32025 represents a critical elevation of privilege flaw within the QNX Neutrino Kernel, affecting multiple QNX software platforms including the QNX Software Development Platform versions 6.4.0 through 7.0, QNX Momentics 6.3.x series, QNX OS for Safety versions 1.0.0 to 1.0.2 and 2.0.0 to 2.0.1, and QNX for Medical versions 1.0.0 to 1.1.1 along with version 2.0.0. This kernel-level vulnerability stems from improper privilege handling mechanisms that allow unprivileged processes to escalate their privileges to kernel-level access. The flaw manifests in the kernel's privilege validation routines where insufficient checks permit malicious actors to exploit specific kernel interfaces and system calls. The vulnerability is categorized under CWE-276 as improper privilege management, which directly aligns with the ATT&CK framework's privilege escalation techniques. The security implications extend beyond simple access control violations, as the flaw enables potential data exfiltration, system behavior modification, and permanent system crashes that could result in complete system compromise.
The technical exploitation of this vulnerability occurs through kernel memory manipulation and privilege escalation attacks that leverage the flawed kernel interfaces. Attackers can potentially exploit the vulnerability by crafting specific system calls or memory operations that bypass normal kernel privilege checks, allowing them to execute code with kernel-level privileges. The root cause lies in inadequate validation of process privileges when handling certain kernel data structures and system operations. This allows an attacker with minimal system access to perform privilege elevation attacks that would normally require elevated permissions. The vulnerability's impact is particularly severe in safety-critical environments where QNX systems are deployed, as these systems often control life-critical functions in automotive, aerospace, and medical devices. The exploitation mechanism typically involves leveraging race conditions, memory corruption, or improper access control checks within the kernel's privilege management subsystem.
The operational impact of CVE-2021-32025 extends across multiple industrial and safety-critical sectors where QNX systems are deployed. In automotive applications, this vulnerability could potentially allow attackers to compromise vehicle control systems, affecting brake systems, steering controls, or other critical safety mechanisms. Medical device environments face similar risks where system compromise could endanger patient safety through unauthorized access to medical device controls or data manipulation. The vulnerability's potential for permanent system crashes makes it particularly dangerous in environments where system reliability is paramount, such as industrial control systems, avionics, or emergency response systems. Organizations using affected QNX versions must consider the possibility of complete system compromise, data loss, and operational disruptions that could result from successful exploitation. The vulnerability's presence in QNX OS for Safety and QNX for Medical versions indicates that even the most security-critical implementations are at risk, highlighting the widespread nature of the flaw across QNX's product portfolio.
Mitigation strategies for CVE-2021-32025 require immediate action from affected organizations, including applying vendor-provided patches and updates to all affected QNX systems. System administrators should implement network segmentation to limit access to affected systems and monitor for potential exploitation attempts. The implementation of additional security controls such as kernel module signing, integrity verification, and runtime monitoring can help detect unauthorized privilege escalation attempts. Organizations should conduct comprehensive vulnerability assessments to identify all systems running affected QNX versions and prioritize remediation efforts based on risk exposure. Security teams should also implement monitoring solutions that can detect anomalous system behavior indicative of privilege escalation attacks, particularly focusing on kernel-level activities and unusual memory access patterns. The vulnerability's classification as a critical elevation of privilege issue means that organizations must treat it with the highest priority, implementing both immediate patching and long-term security architecture improvements to prevent similar vulnerabilities from occurring in the future. Regular security audits and penetration testing of QNX systems should be conducted to identify and remediate similar privilege management flaws before they can be exploited by threat actors.