CVE-2023-26065 in Device
Summary
by MITRE • 04/10/2023
Certain Lexmark devices through 2023-02-19 have an Integer Overflow.
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Analysis
by VulDB Data Team • 11/03/2025
The vulnerability identified as CVE-2023-26065 represents a critical integer overflow issue affecting certain Lexmark printing devices released through February 19, 2023. This flaw exists within the device firmware and impacts the device's ability to properly handle numerical inputs during processing operations. The integer overflow occurs when the system attempts to process values that exceed the maximum capacity of the integer data type, potentially leading to unexpected behavior in the device's operational logic. Such vulnerabilities are particularly dangerous in embedded systems like network printers where the attack surface is limited but the impact on network operations can be significant.
The technical implementation of this vulnerability stems from insufficient input validation within the device's processing pipeline. When malformed or excessively large integer values are submitted through print jobs or device management interfaces, the system fails to properly handle the overflow condition. This can result in the integer wrapping around to negative values or zero, causing unpredictable behavior in memory allocation, buffer handling, or control flow operations. The vulnerability is classified under CWE-190, Integer Overflow or Wraparound, which specifically addresses issues where integer arithmetic operations produce results that exceed the maximum value representable by the data type. This particular implementation likely occurs in the device's print job processing engine where integer values are used to determine buffer sizes, loop iterations, or memory allocation parameters.
The operational impact of this vulnerability extends beyond simple device malfunction to potentially enable more serious security exploits. Attackers could leverage this integer overflow to manipulate device behavior, potentially causing denial of service conditions where legitimate print jobs are disrupted or the device becomes unresponsive. In more sophisticated attack scenarios, the overflow could be used to overwrite memory locations, potentially leading to arbitrary code execution within the device's constrained environment. This vulnerability affects network-connected Lexmark devices that process print jobs from remote sources, making it particularly concerning for enterprise environments where multiple devices are interconnected. The risk is amplified when considering that many of these devices operate in environments with limited network segmentation, allowing potential attackers to reach vulnerable devices through lateral movement or direct network access.
Mitigation strategies for CVE-2023-26065 should prioritize immediate firmware updates from Lexmark to address the underlying integer overflow condition. Organizations should implement network segmentation to limit access to printing devices and establish strict access controls for device management interfaces. Monitoring network traffic for unusual print job patterns or malformed data submissions can help detect potential exploitation attempts. Device administrators should also consider disabling unnecessary network services and implementing secure print release mechanisms to reduce the attack surface. The vulnerability aligns with ATT&CK technique T1210, Exploitation of Remote Services, as it represents an attack vector through network-connected devices. Additionally, this issue demonstrates the importance of input validation in embedded systems and reinforces the need for comprehensive security testing of firmware components before deployment in enterprise environments. Regular vulnerability assessments and patch management programs should include thorough evaluation of device firmware to identify similar integer overflow conditions that could compromise device integrity and network security.