In the Linux kernel, a vulnerability has been identified in the GPIO subsystem related to resource management in the function gpiochip_add_data_with_key(). The vulnerability arises due to a failure to drop the reference count on the device in certain error handling paths.
This vulnerability allows for resource leaks when errors occur, which can lead to instability in systems utilizing affected versions of the Linux kernel. The severity of this issue is currently classified as unknown, but the implications for organizations can be significant.
Risk to organizations includes potential system instability and resource exhaustion, especially in critical systems relying on GPIO functionality. Given the nature of the vulnerability and its potential impact, organizations should prioritize patching immediately.
As of now, there is no confirmed public exploit available for this vulnerability, indicating a lower likelihood of immediate attacks. However, it is essential for organizations to remain vigilant and address this issue in their patch management processes.
Immediate action is recommended to mitigate any risks associated with this vulnerability.
Vulnerability Details
In the Linux kernel, the following vulnerability has been resolved: gpio: Fix resource leaks on errors in gpiochip_add_data_with_key(). Since commit aab5c6f20023 ("gpio: set device type for GPIO chips"), `gdev->dev.release` is unset. As a result, the reference count to `gdev->dev` isn't dropped on the error handling paths. The fix involves dropping the reference on errors and reordering the instructions for simpler error handling.
The CVSS score for this vulnerability is not available, and it has not been included in the Known Exploited Vulnerabilities (KEV) catalog. This indicates that while the vulnerability exists, it may not currently be a significant target for attackers.
Technical Analysis
The root cause of this vulnerability is the mishandling of resource references in the GPIO subsystem, which can lead to memory leaks during error recovery. The attack vector is considered low, as the vulnerability requires specific conditions to manifest.
The complexity of an attack leveraging this vulnerability is low. However, it does require an attacker to have access to the affected system to trigger the error handling scenarios that lead to resource leakage.
No privileges are required to exploit this vulnerability, and no user interaction is necessary. The impact on confidentiality, integrity, and availability is not fully defined due to the lack of a CVSS score.
Risk & Impact Analysis
Real-world deployment risk for this vulnerability is moderate, as it affects the stability of systems relying on the GPIO functionality. Organizations utilizing the Linux kernel in critical environments should be particularly concerned, as failure to address this vulnerability could have cascading effects on operations.
Why this matters to organizations is clear: resource leaks can lead to service outages, increased operational costs, and potential data loss. Understanding the blast radius potential is essential, especially for systems that depend heavily on GPIO operations.
Given the current CVSS score is not available and the KEV status indicates no active exploitation, organizations should schedule remediation during their patch cycles, while maintaining vigilance in monitoring for any unusual activity.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions prior to vendor patch are affected by this vulnerability. Organizations should ensure their systems are updated to the latest kernel version that includes the fix.
Mitigation & Remediation
Organizations should prioritize patching their Linux kernel to the latest version that resolves this vulnerability. Specific updates should be monitored through vendor advisories and integrated into patch management processes.
In the absence of an immediate patch, organizations can implement workarounds by disabling GPIO functionality if it is not critical to operations. Proper monitoring and logging should also be established to identify any anomalies that may arise from potential exploitation.
For detailed guidance on patch management and security testing, organizations can refer to our vulnerability management program resources.
Detection Guidance
Organizations should monitor log files for any unusual activities related to GPIO operations. Behavioral anomalies may indicate exploitation attempts or resource leaks.
Network signatures should be established to detect any unauthorized access attempts. Additionally, any changes to system resources related to GPIO should be flagged for review.
AppSecure Threat Intelligence Insight
The long-term significance of this vulnerability lies in the potential for resource mismanagement across systems relying on GPIO functionality. It highlights the critical need for robust error handling in system-level software.
This vulnerability may represent a trend in software development where resource management is overlooked, leading to increased vulnerabilities. Security teams should focus on incorporating comprehensive testing methodologies to identify similar flaws.
Organizations can gain insights into effective security practices by reviewing our resources on cloud security assessments and penetration testing methodologies to enhance their security posture.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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