Invalid Page Access After Closing Deferred I/O Devices in fbdev
Summary
GSD-2023-1002313: fbdev: Fix invalid page access after closing deferred I/O devices. Affects Kernel versions >= 56c134f7f1b58be08bdb0ca8372474a4a5165f31, < f1d91f0e9d5a240a809698d7d9c5a538e7dcc149. No fix is published. How to fix ↓
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Background
The fbdev package is a Linux kernel subsystem that provides support for frame buffer devices. Frame buffer devices are used for displaying graphics on computer systems. The fbdev subsystem allows user-space applications to interact with frame buffer devices. This vulnerability affects the fbdev subsystem in the Linux Kernel.
Vulnerability Detail
The vulnerability in the fbdev subsystem allows for invalid page access after closing deferred I/O devices. This issue was introduced in version v5.19 of the Linux Kernel and was fixed in version v6.1.13. An attacker could potentially exploit this vulnerability to gain unauthorized access or execute arbitrary code. The vulnerability is caused by a flaw in the handling of deferred I/O devices, which can lead to accessing invalid memory pages. This could result in a system crash or the execution of malicious code.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround for this vulnerability at the moment.
Conclusion
The fbdev package in the Linux Kernel is vulnerable to an invalid page access issue after closing deferred I/O devices. This vulnerability can potentially lead to unauthorized access or code execution. It is recommended to update the Linux Kernel to version v6.1.13 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The fbdev package is a Linux kernel subsystem that provides support for frame buffer devices.
A frame buffer device is used for displaying graphics on computer systems.
This vulnerability could allow an attacker to gain unauthorized access or execute arbitrary code.
To fix this vulnerability, update the Linux Kernel to version v6.1.13 or later.
There is currently no known workaround for this vulnerability.
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