fbmem: Do not delete the mode that is still in use in Kernel
Summary
GSD-2021-1001282: fbmem: Do not delete the mode that is still in use. Affects Kernel versions >= 13ff178ccd6d3b8074c542a911300b79c4eec255, < 087bff9acd2ec6db3f61aceb3224bde90fe0f7f8. No fix is published. How to fix ↓
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Background
The Kernel is a critical component of the Linux operating system that manages system resources and provides an interface for applications to interact with the hardware. It is responsible for memory management, process scheduling, device drivers, and other essential functions. The fbmem module in the Kernel is used to manage frame buffer memory, which is crucial for graphics display on systems without a dedicated graphics card. This vulnerability in the fbmem module allows the deletion of a mode that is still in use, leading to potential system instability and crashes.
Vulnerability Detail
The vulnerability arises from a flaw in the fbmem module of the Kernel. When attempting to delete a mode that is still in use, the module fails to properly handle this scenario, resulting in undefined behavior. An attacker could exploit this vulnerability to cause a denial of service (DoS) by triggering system crashes or instability. The impact and attack plausibility of this vulnerability have not been fully proven yet.
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 essential to apply the fix by updating the Kernel to the patched version.
Conclusion
The fbmem module in the Kernel is vulnerable to a flaw that allows the deletion of a mode still in use, potentially leading to system crashes and instability. It is crucial to update the Kernel to version v5.10.52 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The fbmem module in the Kernel is responsible for managing frame buffer memory, which is used for graphics display on systems without a dedicated graphics card.
This vulnerability can lead to system crashes and instability, potentially causing a denial of service (DoS) condition.
To fix this vulnerability, update your Kernel to version v5.10.52 or later.
No, there is no known workaround for this vulnerability. Updating the Kernel is the recommended solution.
You can use Vulert's 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.
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