Use-after-free vulnerability in video: fbdev: vesafb
Summary
GSD-2022-1003316: video: fbdev: vesafb: Fix a use-after-free due early fb_info cleanup. Affects Kernel versions >= f94aa46efaa087ec075c83e4508f943fb5e43977, < 0fac5f8fb1bc2fc4f8714bf5e743c9cc3f547c63. No fix is published. How to fix ↓
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Background
The video: fbdev: vesafb package is a component of the Linux Kernel ecosystem. It provides support for the vesafb driver, which allows for framebuffer access on certain video cards. The vesafb driver is responsible for managing the video memory and providing a virtual framebuffer device. This vulnerability affects versions of the Linux Kernel from v5.15.41 to v5.15.45.
Vulnerability Detail
The use-after-free vulnerability in video: fbdev: vesafb is caused by an early cleanup of the fb_info structure. This can lead to a situation where a reference to the structure is still held, but the structure itself has been freed. An attacker could potentially exploit this vulnerability to execute arbitrary code or cause a denial of service. The vulnerability was introduced in version v5.15.41 and has been fixed in version v5.15.46 of the Linux Kernel.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround for this vulnerability.
Conclusion
The use-after-free vulnerability in video: fbdev: vesafb can be mitigated by updating the Linux Kernel to version v5.15.46 or later. Users should follow the provided instructions to obtain the latest version of the Linux Kernel source code and compile it accordingly. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
video: fbdev: vesafb is a component of 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 reference after it has been freed, leading to potential security issues.
This vulnerability could allow an attacker to execute arbitrary code or cause a denial of service on systems running the affected versions of the Linux Kernel.
To fix this vulnerability, users should update their Linux Kernel to version v5.15.46 or later.
No, there is currently no known workaround for this vulnerability.
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