CVE-2026-110322 in Device Driver Setup
Summary
by MITRE • 10/21/2026
The PEAK-System PCAN type 0x4030 processing path fails to validate a selected/returned object pointer before dereferencing fixed fields during post-processing.
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Analysis
by VulDB Data Team • 10/21/2026
The vulnerability identified in the PEAK-System PCAN driver, specifically within the handling of device control codes associated with the identifier 0x4030, represents a critical memory safety flaw rooted in improper input validation and pointer management. This issue resides deep within the kernel-mode processing path responsible for managing CAN bus communication interfaces. The core technical deficiency lies in the failure to perform adequate bounds checking or validity verification on an object pointer that has been selected or returned by internal allocation mechanisms before it is dereferenced to access fixed structure fields during post-processing operations. In a typical secure implementation, any pointer retrieved from dynamic memory pools or user-supplied buffers must be validated against null values and checked for alignment and accessibility within the expected kernel address space boundaries. The absence of these checks creates a direct pathway for exploitation where an attacker can manipulate the state of the driver to cause it to dereference an invalid, uninitialized, or maliciously crafted pointer.
From a technical perspective, this flaw aligns closely with CWE-416, which describes Use After Free vulnerabilities, and CWE-252, Checkpoint Unchecked Return Value, depending on whether the pointer was previously freed or simply never properly initialized before use. The specific mechanism involves the driver accepting control codes that trigger internal logic paths where a pointer is obtained but not verified for integrity prior to accessing its members. When the kernel attempts to read from this unvalidated memory address, it leads to an out-of-bounds access or a null pointer dereference event. Such events typically result in immediate system instability, manifesting as a blue screen of death on Windows systems or a kernel panic on Linux environments. However, beyond simple denial of service, the nature of improper pointer dereferencing can sometimes be leveraged for more severe consequences if the attacker has control over the memory contents at that specific address, potentially leading to arbitrary code execution with kernel-level privileges.
The operational impact of this vulnerability is significant due to its location within a widely used hardware abstraction layer for automotive and industrial communication protocols. PCAN adapters are frequently deployed in critical infrastructure, vehicle diagnostics, and embedded systems where reliability is paramount. A successful exploitation could allow an attacker who has local access or network-accessible control over the CAN interface to crash the host system, disrupting ongoing communications and potentially causing physical damage in connected IoT or automotive environments if safety-critical processes are interrupted. Furthermore, if the vulnerability allows for arbitrary read/write primitives through careful manipulation of memory states during the dereference attempt, it could serve as a stepping stone for privilege escalation attacks, granting an unprivileged user full control over the operating system kernel.
Mitigation strategies must focus on both immediate patching and long-term architectural improvements. The primary remediation is to apply the vendor-provided security update that introduces rigorous validation checks before any pointer dereference occurs in the 0x4030 processing path. Developers should implement strict null-pointer checks, ensure proper initialization of all pointers prior to use, and validate memory ranges against known safe boundaries. From a defensive posture perspective, organizations relying on this hardware should enable kernel patching technologies such as Windows Kernel Patch Protection or Linux KASLR where applicable to mitigate exploitation attempts. Additionally, restricting physical access to CAN bus interfaces and implementing strict driver loading policies via device control managers can reduce the attack surface available to potential adversaries seeking to trigger these vulnerable code paths.