CVE-2026-13196 in piControl
Summary
by MITRE • 08/14/2026
Nozomi Networks Labs identified a CWE-787: Out-of-bounds Write vulnerability in the process-image management functionality of KUNBUS piControl in version 2.6.2 that allows a local authenticated attacker with device configuration access to write attacker-controlled data outside the bounds of the process-image buffer and corrupt adjacent kernel memory, resulting in kernel memory corruption and denial of service, by supplying crafted device configuration data and crafted input through the piControl character device.
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Analysis
by VulDB Data Team • 08/14/2026
The vulnerability resides within the KUNBUS piControl device management system version 262 where a specific flaw in the process-image handling mechanism creates a dangerous out-of-bounds write condition. This represents a classic memory safety issue that stems from inadequate bounds checking during buffer operations, specifically affecting how the system processes configuration data through the piControl character device interface. The vulnerability is classified under CWE-787 which denotes an out-of-bounds write error where a program writes data past the end of a buffer or array, potentially overwriting adjacent memory locations.
The technical exploitation requires a local attacker who already possesses authentication credentials and device configuration access to leverage this weakness effectively. When crafted device configuration data is processed through the piControl character device, the system fails to properly validate input boundaries before writing process-image data to memory. This allows an attacker to inject malicious data that extends beyond the allocated buffer space, thereby corrupting adjacent kernel memory regions. The attack vector specifically targets the interaction between user-space applications and kernel-space components through the character device interface which serves as the communication channel for device configuration operations.
The operational impact of this vulnerability manifests as kernel memory corruption that leads to system instability and denial of service conditions. When adjacent kernel memory gets overwritten, it can cause unpredictable behavior in critical system components including device drivers, memory management structures, or process scheduling mechanisms. The severity extends beyond simple service disruption since kernel-level memory corruption can potentially lead to privilege escalation opportunities or system crashes that require manual intervention for recovery. This vulnerability essentially undermines the fundamental stability and reliability of the piControl device by creating a pathway for persistent denial of service attacks.
Mitigation strategies should focus on implementing robust input validation and bounds checking mechanisms within the process-image management functionality. The recommended approach involves adding comprehensive boundary checks before any buffer write operations occur, ensuring that all input data conforms to expected size limits before processing. Additionally, memory protection mechanisms such as stack canaries, address space layout randomization, and kernel hardening features should be enabled to reduce exploitability. Organizations should also implement strict access controls to limit device configuration access to authorized personnel only, while maintaining regular firmware updates to address known vulnerabilities. The ATT&CK framework categorizes this vulnerability under privilege escalation techniques through kernel exploits, making it particularly concerning for industrial control systems where reliability and security are paramount considerations.
The root cause analysis reveals that the implementation lacks proper defensive programming practices common in secure software development methodologies. The absence of input sanitization and boundary validation creates a dangerous attack surface that can be exploited by adversaries with minimal privileges within the system. This vulnerability demonstrates how seemingly minor flaws in buffer management can create significant security implications, particularly in embedded systems where recovery from kernel-level corruption can be extremely difficult or impossible without physical intervention.