Missing Free in wm8350-power Charger IRQ
Summary
GSD-2022-1002353: power: supply: wm8350-power: Add missing free in free_charger_irq. Affects Kernel versions >= 14431aa0c5a443d13d24e6f865a8838f97dab973, < 60dd1082322966f192f42fe2a6605dfa08eef41f. No fix is published. How to fix ↓
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Background
The wm8350-power module is responsible for managing power supply in devices that use the WM8350 power management IC. It provides functionality for charging the device's battery and handling charger-related interrupts. The vulnerability in question pertains to a missing 'free' operation in the 'free_charger_irq' function of the module.
Vulnerability Detail
The missing 'free' operation in the 'free_charger_irq' function can lead to a resource leak. When a charger interrupt is no longer needed, the function is responsible for freeing the associated resources. However, due to the missing 'free' operation, these resources are not properly released, resulting in a potential resource exhaustion issue. An attacker could potentially exploit this vulnerability to exhaust system resources, leading to a denial-of-service condition or other adverse effects.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround mentioned for this vulnerability.
Conclusion
The missing 'free' operation in the 'free_charger_irq' function of the wm8350-power module can lead to a resource leak and potential resource exhaustion. To mitigate this vulnerability, it is recommended to update to Linux Kernel version v4.19.238 or later. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability can vary depending on the specific usage scenario. It could potentially lead to resource exhaustion, resulting in a denial-of-service condition or other adverse effects.
You can use the Vulert Playground (https://vulert.com/scanner) to check if your system is affected by this vulnerability. Simply upload your package-lock.json file and Vulert will analyze it for any open-source vulnerabilities, including this one.
At the time of this report, there is no known exploit for this vulnerability. However, it is always recommended to apply the necessary patches and updates to mitigate any potential risks.
To exploit this vulnerability, an attacker would need to have the ability to trigger charger interrupts in the affected system. This typically requires physical access to the device or some level of control over the charging process.
Yes, this vulnerability has been fixed in Linux Kernel version v4.19.238 by commit 60dd1082322966f192f42fe2a6605dfa08eef41f.
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