Use After Free Vulnerability in pch_can
Summary
GSD-2021-1002504: can: pch_can: pch_can_rx_normal: fix use after free. Affects Kernel versions >= b21d18b51b31a24d17f883b678432fbdee3d5675, < 703dde112021c93d6e89443c070e7dbd4dea612e. No fix is published. How to fix ↓
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Background
The pch_can package is a component of the Linux Kernel, which is responsible for handling Controller Area Network (CAN) devices. CAN is a communication protocol used in automotive and industrial applications. The pch_can module provides support for the PCH (Platform Controller Hub) CAN controller found in Intel chipsets. This vulnerability affects the pch_can_rx_normal function in the pch_can module.
Vulnerability Detail
The pch_can_rx_normal function in the pch_can module suffers from a use after free vulnerability. This vulnerability was introduced in version v2.6.37 of the Linux Kernel and was fixed in version v5.10.85. An attacker could exploit this vulnerability to execute arbitrary code or cause a denial of service by manipulating the CAN bus. The vulnerability occurs when the pch_can_rx_normal function attempts to access a pointer that has already been freed, leading to undefined behavior.
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 official fix by updating the Linux Kernel.
Conclusion
The use after free vulnerability in the pch_can_rx_normal function of the pch_can module can be fixed by updating the Linux Kernel to version v5.10.85 or later. It is recommended to apply the official fix to ensure the security and stability of systems using the pch_can module. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
This vulnerability could allow an attacker to execute arbitrary code or cause a denial of service by manipulating the CAN bus.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your package-lock.json file to the playground and it will alert you if the vulnerability is present.
At the time of this report, there is no known public exploit for this vulnerability.
The only known mitigation is to update the Linux Kernel to version v5.10.85 or later.
You can find more information about this vulnerability in the GSD-2021-1002504 entry of the GSD Database at https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1002xxx/GSD-2021-1002504.json.
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