Refcount Leak in esdhc_signal_voltage_switch in Kernel
Summary
GSD-2022-1005595: mmc: sdhci-of-esdhc: Fix refcount leak in esdhc_signal_voltage_switch. Affects Kernel versions >= ea35645a3c66a74af92d3bbb4eb131220fc3e58a, < 352377cf74710bc3368dddf78f17210dfe456933. No fix is published. How to fix ↓
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Background
The Kernel is a crucial component of the Linux operating system that provides core functionalities and acts as an interface between hardware and software. It manages system resources, facilitates communication between different software components, and ensures the stability and security of the system. The vulnerability in question affects the Kernel's sdhci-of-esdhc module, which is responsible for handling SD/MMC host controllers on certain platforms.
Vulnerability Detail
The vulnerability identified in the sdhci-of-esdhc module is a refcount leak in the esdhc_signal_voltage_switch function. This function is responsible for signaling a voltage switch to the SD/MMC host controller. However, due to a coding error, the function fails to properly release the reference count, leading to a resource leak. An attacker with local access to the system could potentially exploit this vulnerability to exhaust system resources, resulting in a denial-of-service condition or other unpredictable behavior. It is important to note that the impact and attack plausibility of this vulnerability have not been proven.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
No specific workaround has been provided for this vulnerability.
Conclusion
In conclusion, the Kernel's sdhci-of-esdhc module is affected by a refcount leak vulnerability in the esdhc_signal_voltage_switch function. This vulnerability can potentially lead to a denial-of-service condition or other unpredictable behavior. It is recommended to update the Linux Kernel to version v5.15.61 or later to mitigate this vulnerability. For further support on vulnerability remediation, you can reach out to DevNack.com.
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FAQ
The impact of this vulnerability could potentially lead to a denial-of-service condition or other unpredictable behavior. However, the actual impact and attack plausibility have not been proven.
No, this vulnerability requires local access to the system in order to be exploited.
The vulnerability was introduced in version v4.12 of the Linux Kernel and is present in all subsequent versions until v5.15.60. It has been fixed in version v5.15.61.
There is currently no known evidence of this vulnerability being actively exploited.
For more details about this vulnerability, you can refer to the source information provided by the Cloud Security Alliance's GSD database: https://github.com/cloudsecurityalliance/gsd-database/blob/main/2022/1005xxx/GSD-2022-1005595.json
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