Vulnerability in PM / devfreq: rk3399_dmc
Summary
GSD-2022-1003878: PM / devfreq: rk3399_dmc: Disable edev on remove(). Affects Kernel versions < 664736e2cc09e504ce58ec61164d029d1f2651bb. No fix is published. How to fix ↓
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Background
The PM / devfreq package is a component of the Linux Kernel that manages the dynamic frequency scaling of devices. It includes the rk3399_dmc module, which is responsible for managing the frequency scaling of the Rockchip RK3399 DMC (Dynamic Memory Controller). The DMC controls the memory frequency and voltage, optimizing performance and power consumption. However, a vulnerability has been discovered in the rk3399_dmc module that can potentially be exploited by attackers.
Vulnerability Detail
The vulnerability in the rk3399_dmc module occurs when the 'remove()' function is called without disabling the 'edev' (event device) associated with the module. This oversight can lead to a use-after-free vulnerability, where the module continues to reference the 'edev' object after it has been freed. An attacker could potentially exploit this vulnerability to execute arbitrary code or cause a denial-of-service condition. The impact and attack plausibility of this vulnerability have not been proven yet.
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 PM / devfreq: rk3399_dmc vulnerability in the Linux Kernel has the potential to be exploited by attackers. It is recommended to update the Linux Kernel to version v4.19.247 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The PM / devfreq package is a component of the Linux Kernel that manages the dynamic frequency scaling of devices.
The rk3399_dmc module is responsible for managing the frequency scaling of the Rockchip RK3399 DMC (Dynamic Memory Controller).
A use-after-free vulnerability occurs when a program continues to reference memory after it has been freed, potentially leading to unexpected behavior or security issues.
The impact of this vulnerability is currently unknown, as the attack plausibility has not been proven yet. However, it could potentially allow an attacker to execute arbitrary code or cause a denial-of-service condition.
To fix this vulnerability, users should update their Linux Kernel to version v4.19.247 or later.
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