In the Linux kernel, a new vulnerability has been identified that involves a double free within the GPIO (General Purpose Input/Output) reset process. Specifically, this vulnerability arises when the function __auxiliary_device_add() fails, leading to the invocation of the reset_add_gpio_aux_device() function, which subsequently calls the auxiliary_device_uninit(adev) function. During this process, the device release callback, reset_gpio_aux_device_release(), frees the adev pointer, but the error path erroneously calls kfree(adev) again, resulting in a double free scenario.
The implications of such a vulnerability can be significant, particularly in environments where stability and reliability of the Linux kernel are paramount. Risk to organizations includes potential system crashes or unpredictable behavior due to memory corruption, which could be exploited under certain circumstances.
As of now, the vulnerability status is classified as 'Awaiting Analysis.' There are no known exploits or public proof-of-concept code available, indicating that exploitation is currently unlikely. However, organizations should remain vigilant and monitor for any updates regarding this vulnerability.
Organizations should prioritize monitoring for updates related to this vulnerability to ensure system integrity and minimize any potential risks associated with this issue.
Vulnerability Details
The specific vulnerability is described as follows: 'In the Linux kernel, the following vulnerability has been resolved: reset: gpio: fix double free in reset_add_gpio_aux_device() error path. When __auxiliary_device_add() fails, reset_add_gpio_aux_device() calls auxiliary_device_uninit(adev). The device release callback reset_gpio_aux_device_release() frees adev, but the current error path then calls kfree(adev) again, causing a double free. Keep kfree(adev) for the auxiliary_device_init() failure path, but avoid freeing adev after auxiliary_device_uninit().'
There is currently no CVSS score available for this vulnerability, and the severity is classified as unknown. The publication date of this vulnerability is May 1, 2026.
Technical Analysis
The root cause of this issue lies in the improper management of memory in the Linux kernel's GPIO subsystem. The function reset_add_gpio_aux_device() does not appropriately handle error paths, leading to the double free scenario.
The attack vector for this vulnerability is classified as unknown, indicating that specific conditions for exploitation have not been delineated. With respect to attack complexity, it is categorized as low, suggesting that successful exploitation may require minimal effort. No special privileges are required for exploitation, and user interaction is not necessary.
The potential impacts on confidentiality, integrity, and availability remain undefined at this time due to the current lack of detailed analysis.
Risk & Impact Analysis
Real-world deployment risks associated with this vulnerability include the potential for system instability and crashes, particularly in critical infrastructure environments where the Linux kernel plays a crucial role. The lack of a CVSS score and the designation of 'Awaiting Analysis' highlight the need for caution and proactive monitoring.
Given the current unknown severity, organizations should assess the potential impacts on their operations and prioritize ongoing system evaluations. The urgency for remediation will depend on the developments surrounding this vulnerability and any subsequent patches or mitigations that may be released.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
Specific affected versions have not been disclosed. It is recommended to consider all versions of the Linux kernel prior to any patches as potentially affected.
Mitigation & Remediation
Organizations should prioritize monitoring for updates regarding this vulnerability. Given the low exploitability and the current lack of known exploits, the urgency for immediate remediation is low. However, as a best practice, organizations should prepare to implement patches or updates when they become available.
Detection Guidance
Monitoring logs for abnormal error messages related to the GPIO subsystem may provide insights into potential exploitation attempts. Additionally, observing system behavior for unusual crashes or memory-related errors can serve as indicators of a potential issue.
AppSecure Threat Intelligence Insight
This vulnerability highlights the importance of robust memory management practices within kernel development. As security teams analyze this vulnerability, they should consider implementing stricter code reviews and testing protocols to prevent similar issues in the future.
Security teams are encouraged to stay informed of developments related to this vulnerability. Engaging in proactive security assessments can help identify potential weaknesses before they are exploited.
Investing in continuous security testing can further bolster defenses against vulnerabilities like this, ensuring that organizations are prepared to respond effectively.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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