CVE-2023-54282 in Linux
Summary
by MITRE • 12/30/2025
In the Linux kernel, the following vulnerability has been resolved:
media: tuners: qt1010: replace BUG_ON with a regular error
BUG_ON is unnecessary here, and in addition it confuses smatch. Replacing this with an error return help resolve this smatch warning:
drivers/media/tuners/qt1010.c:350 qt1010_init() error: buffer overflow 'i2c_data' 34 <= 34
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Analysis
by VulDB Data Team • 04/27/2026
The vulnerability identified as CVE-2023-54282 affects the Linux kernel's media subsystem, specifically within the tuner driver for the qt1010 device. This issue resides in the drivers/media/tuners/qt1010.c source file where a problematic BUG_ON macro was used in the qt1010_init() function. The fundamental flaw stems from improper error handling that creates misleading static analysis warnings and potentially impacts the driver's reliability. The qt1010 tuner driver is responsible for controlling radio frequency tuners used in various media devices including USB dongles and TV tuners that require precise frequency tuning capabilities.
The technical implementation flaw involves the replacement of BUG_ON with standard error return handling within the qt1010_init() function at line 350. The original BUG_ON macro was causing smatch static analysis tool to generate false positive buffer overflow warnings, specifically indicating that the i2c_data buffer of size 34 might be insufficient for a 34-byte operation. This misleading warning occurs because BUG_ON macros are designed to terminate execution immediately upon failure conditions, which confuses static analysis tools that cannot properly track the code flow when such macros are present. The smatch tool is particularly sensitive to these constructs as it attempts to perform precise static analysis of buffer usage and potential overflow conditions.
The operational impact of this vulnerability primarily manifests through misleading static analysis warnings that could obscure genuine security or stability issues within the driver code. While the immediate functional impact appears minimal since the driver would continue operating, the presence of false positive buffer overflow warnings in static analysis tools creates confusion for developers and security analysts who rely on these tools for identifying real vulnerabilities. This particular issue demonstrates how improper error handling mechanisms can create misleading diagnostic information that may lead to wasted development time and potentially cause analysts to overlook more serious security concerns in the same codebase. The vulnerability aligns with CWE-664, which addresses improper control of a resource through a lifetime, specifically in the context of static analysis tool behavior and code quality.
The recommended mitigation approach involves replacing the BUG_ON macro with appropriate error return handling that allows the driver to gracefully handle initialization failures while maintaining proper error propagation to the calling subsystem. This change ensures that static analysis tools can properly evaluate buffer usage without generating false positive warnings. The fix directly addresses the smatch warning by eliminating the problematic macro usage and provides more appropriate error handling that aligns with standard Linux kernel driver development practices. This remediation approach follows established kernel development guidelines where BUG_ON should only be used for conditions that should never occur under normal circumstances, while regular error returns are preferred for recoverable error conditions. The solution also supports ATT&CK technique T1592 by ensuring proper error handling mechanisms that maintain system stability and prevent misleading diagnostic information that could impact security analysis processes.
The broader implications of this vulnerability highlight the importance of proper static analysis tool integration within kernel development workflows. Modern kernel development increasingly relies on automated static analysis tools to identify potential security issues and code quality problems before code reaches production environments. When error handling mechanisms create false positives in these tools, it undermines their effectiveness and can lead to decreased trust in automated security analysis processes. The qt1010 driver serves as an example of how seemingly minor code quality issues can have significant impacts on development workflows and security analysis practices within kernel development communities. This vulnerability demonstrates that even non-security related code quality issues can affect the overall security posture by creating confusion in analysis tools that are critical for identifying genuine security vulnerabilities.