Null Dereference in deinit - Kernel
Summary
GSD-2022-1003894: media: venus: hfi: avoid null dereference in deinit. Affects Kernel versions < a21d15dde21d7e8ae047eb8368677407db45d840. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system that acts as a bridge between the hardware and software layers. It provides essential functionalities such as process management, memory management, and device drivers. The vulnerability in question affects the Kernel's media subsystem, specifically the Venus HFI component. Venus HFI is responsible for handling media-related operations, including video encoding and decoding. This vulnerability can lead to a null dereference during the deinitialization process, potentially causing a system crash or enabling an attacker to execute arbitrary code.
Vulnerability Detail
The vulnerability arises due to a null dereference in the deinit function of the Venus HFI component. When the deinitialization process is triggered, the code fails to check for null pointers, leading to a crash or potential code execution. An attacker could potentially exploit this vulnerability by sending specially crafted media data to the system, causing a null pointer to be dereferenced and triggering the vulnerability. The impact of this vulnerability can range from denial of service (system crash) to remote code execution, depending on the attacker's capabilities and the system's configuration.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, users can disable or remove the Venus HFI component if it is not essential for their system's functionality. However, this may impact media-related operations that rely on Venus HFI. It is recommended to apply the official fix by updating the Kernel to the patched version.
Conclusion
The null dereference vulnerability in the Venus HFI deinit function of the Kernel's media subsystem can lead to system crashes or remote code execution. It is crucial to update the Kernel to version v4.19.247 or later to mitigate this vulnerability. Users can also utilize the Vulert Playground at https://vulert.com/scanner to check if their system is affected and receive real-time alerts for open-source vulnerabilities. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The impact can range from a system crash (denial of service) to potential remote code execution, depending on the attacker's capabilities and the system's configuration.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your manifest file (e.g., package-lock.json) and Vulert will provide real-time alerts for open-source vulnerabilities, including this one.
Yes, users can disable or remove the Venus HFI component if it is not necessary for their system. However, this may impact media-related operations that rely on Venus HFI. It is recommended to apply the official fix by updating the Kernel to the patched version.
Yes, older versions of the Kernel that do not include the fix are affected by this vulnerability. It is crucial to update to version v4.19.247 or later to mitigate the risk.
Yes, this vulnerability can be exploited remotely if an attacker can send specially crafted media data to the system. By triggering the null dereference in the Venus HFI deinit function, an attacker could potentially execute arbitrary code on the target system.
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