Use-after-free vulnerability in video: fbdev: vesafb
Summary
GSD-2022-1003022: video: fbdev: vesafb: Fix a use-after-free due early fb_info cleanup. Affects Kernel versions >= a1aac13288de2935dc1a9330a93b1ac92f1e2b72, < f605f5558ecc175ec70016a3c15f007cb6386531. No fix is published. How to fix ↓
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Background
The video: fbdev: vesafb package is a component of the Linux Kernel that provides support for the vesafb driver, which allows for framebuffer access on certain video cards. This driver is commonly used for graphical output on Linux systems. The package is responsible for managing the framebuffer device and providing the necessary functionality for displaying graphics on the screen.
Vulnerability Detail
The use-after-free vulnerability in video: fbdev: vesafb is caused by an early cleanup of the fb_info structure, which can lead to a use-after-free condition. This vulnerability can be exploited by an attacker to execute arbitrary code or cause a denial-of-service by manipulating the fb_info structure after it has been freed. 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 known workaround for this vulnerability. It is recommended to apply the fix by updating the Linux Kernel.
Conclusion
The use-after-free vulnerability in video: fbdev: vesafb can potentially be exploited to execute arbitrary code or cause a denial-of-service. It is recommended to update the Linux Kernel to version v5.17.14 or later to fix this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
video: fbdev: vesafb is a package in the Linux Kernel that provides support for the vesafb driver, allowing for framebuffer access on certain video cards.
A use-after-free vulnerability occurs when a program continues to use a memory region after it has been freed. This can lead to memory corruption and potentially allow an attacker to execute arbitrary code or cause a denial-of-service.
This vulnerability can be exploited by an attacker who can manipulate the fb_info structure after it has been freed, potentially leading to arbitrary code execution or a denial-of-service.
The impact and attack plausibility of this vulnerability have not been proven yet. However, it is still recommended to apply the fix to ensure the system is secure.
To fix this vulnerability, update the Linux Kernel to version v5.17.14 or later, which includes the necessary patch to address the use-after-free vulnerability.
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