Memory Leak in EFCH MMIO Support in i2c: piix4
Summary
GSD-2022-1004206: i2c: piix4: Fix a memory leak in the EFCH MMIO support. Affects Kernel versions >= 7c148722d074c29fb998578eea5de3c14b9608c9, < a3263e4cf8265f0c9eb0ed8a9b50f132c7a42e19. No fix is published. How to fix ↓
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Background
The i2c: piix4 is a driver in the Linux Kernel that provides support for the I2C bus on the PIIX4 chipset. The PIIX4 chipset is commonly found in Intel-based systems and is responsible for various functions, including I/O and power management. The EFCH (Enhanced Function Configuration Handling) MMIO support is a feature of the i2c: piix4 driver that allows accessing configuration registers via memory-mapped I/O (MMIO). This feature is used by various devices connected to the I2C bus, such as sensors, controllers, and other peripherals.
Vulnerability Detail
The vulnerability identified in the i2c: piix4 driver is a memory leak in the EFCH MMIO support. A memory leak occurs when memory is allocated but not properly deallocated, leading to a gradual depletion of available memory resources. In the case of the i2c: piix4 driver, this memory leak occurs when handling EFCH MMIO operations, potentially resulting in a continuous loss of memory over time. If left unaddressed, this vulnerability can lead to system instability, performance degradation, and even denial-of-service conditions.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As this vulnerability has been fixed in the Linux Kernel, there is no specific workaround available. It is advised to update to the latest version of the Linux Kernel to mitigate the risk associated with this vulnerability.
Conclusion
The memory leak vulnerability in the EFCH MMIO support of the i2c: piix4 driver has been identified and fixed in the Linux Kernel version v5.18.11. It is crucial to update to the latest version of the Linux Kernel to mitigate the risk associated with this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The i2c: piix4 driver is a component of the Linux Kernel that provides support for the I2C bus on systems using the PIIX4 chipset. It allows communication with devices connected to the I2C bus, such as sensors and controllers.
EFCH MMIO support is a feature of the i2c: piix4 driver that enables accessing configuration registers of devices connected to the I2C bus via memory-mapped I/O (MMIO). It allows for efficient communication and control of these devices.
A memory leak occurs when memory is allocated but not properly deallocated, resulting in a gradual depletion of available memory resources. This can lead to system instability, performance degradation, and potential denial-of-service conditions.
If left unaddressed, this vulnerability can lead to system instability, performance degradation, and even denial-of-service conditions. The continuous loss of memory resources due to the memory leak can impact the overall functioning of the system.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.18.11 or later. Updating to the latest version will ensure that the memory leak in the EFCH MMIO support of the i2c: piix4 driver is resolved.
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