CVE-2026-17029 in IBM
Summary
by MITRE • 08/13/2026
IBM i 7.6, 7.5, 7.4, and 7.3 could allow a local attacker to execute arbitrary code due to an out-of-bounds write.
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Analysis
by VulDB Data Team • 08/13/2026
This vulnerability exists within IBM i operating systems versions 7.6, 7.5, 7.4, and 7.3, presenting a critical security risk that allows local attackers to execute arbitrary code through an out-of-bounds write flaw. The technical implementation involves memory corruption that occurs when the system processes certain input data without proper bounds checking, enabling malicious actors with local access to manipulate memory locations beyond allocated buffers. This type of vulnerability falls under the common weakness enumeration CWE-787, which specifically addresses out-of-bounds writes in software systems. The flaw represents a severe privilege escalation vector since it requires only local system access to exploit, making it particularly dangerous in environments where multiple users share system resources or where unprivileged accounts might gain local shell access through other vulnerabilities.
The operational impact of this vulnerability extends beyond simple code execution capabilities, as successful exploitation could lead to complete system compromise and unauthorized access to sensitive data. Attackers could leverage this vulnerability to install backdoors, modify critical system files, or establish persistent access to the affected systems. The IBM i platform's architecture, which typically operates in controlled enterprise environments with high-security requirements, makes such vulnerabilities particularly concerning since they undermine the fundamental security assumptions of these systems. Organizations running these older versions face heightened risk during routine maintenance windows when local access might be temporarily granted to system administrators or third-party support personnel.
Mitigation strategies should prioritize immediate patch application from IBM, as this represents a critical vulnerability requiring urgent attention. System administrators must implement comprehensive monitoring for suspicious local activity and establish strict access controls to minimize potential attack surfaces. The vulnerability aligns with ATT&CK technique T1059 which covers command and script interpreters, as exploitation would likely involve executing malicious code through system interfaces. Additional protective measures include implementing application whitelisting policies, restricting local user privileges where possible, and conducting thorough security audits of system configurations. Organizations should also consider network segmentation to limit lateral movement capabilities for attackers who might gain initial access through this vulnerability, while maintaining detailed logging of all local system interactions to facilitate forensic analysis if exploitation occurs.