Refcount Leak in pfuze_parse_regulators_dt in Kernel
Summary
GSD-2022-1003784: regulator: pfuze100: Fix refcount leak in pfuze_parse_regulators_dt. Affects Kernel versions >= 3784b6d64dc52ed3fbebad61a85ab9b7a687a167, < 0be5d9da5743b9825a95baec85a67500b2c1d362. No fix is published. How to fix ↓
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Background
The Kernel is a crucial component of the Linux operating system that manages system resources and facilitates communication between hardware and software. It provides essential functionalities for the proper functioning of the system. One of the components in the Kernel is the regulator subsystem, which handles power management for various devices. The pfuze100 regulator driver is responsible for managing regulators on the Freescale PFUZE100 PMIC. However, a vulnerability has been discovered in the pfuze_parse_regulators_dt function of the pfuze100 driver, which can lead to a refcount leak.
Vulnerability Detail
The vulnerability in the pfuze_parse_regulators_dt function of the pfuze100 driver allows for a refcount leak. This issue was introduced in version v3.12 of the Linux Kernel and was fixed in version v5.4.198. The vulnerability occurs when parsing the device tree (DT) bindings for regulators. If the parsing fails, the refcount is not properly decremented, leading to a refcount leak. This can result in resource exhaustion and potential denial-of-service (DoS) attacks. Attackers may be able to exploit this vulnerability to exhaust system resources and disrupt the normal operation of the affected system.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround for this vulnerability. It is recommended to apply the fix mentioned above by updating the Linux Kernel to a version that includes the necessary patch.
Conclusion
In conclusion, the refcount leak vulnerability in the pfuze_parse_regulators_dt function of the pfuze100 driver in the Linux Kernel can lead to resource exhaustion and potential denial-of-service (DoS) attacks. It is crucial to update the Linux Kernel to version v5.4.198 or later to mitigate the risk of exploitation. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
This vulnerability can lead to resource exhaustion and potential denial-of-service (DoS) attacks. Attackers may be able to exploit this vulnerability to exhaust system resources and disrupt the normal operation of the affected system.
You can use tools like Vulert (https://vulert.com) to check if your system is affected by this vulnerability. Vulert uses a manifest file like package-lock.json to monitor and alert in real-time for open-source vulnerabilities in the software.
There is no known workaround for this vulnerability. It is recommended to update the Linux Kernel to a version that includes the necessary fix.
This vulnerability was introduced in version v3.12 of the Linux Kernel and was fixed in version v5.4.198.
You can find more information about this vulnerability in the GSD-2022-1003784 JSON file available in the GSD database (https://github.com/cloudsecurityalliance/gsd-database).
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