Vulnerability in drm: Lock pointer access in drm_master_release()
Summary
UVI-2021-1000856: drm: Lock pointer access in drm_master_release(). Affects Kernel versions < b235f1037c0f9253ae45ff440a33a93e964ad2ec. No fix is published. How to fix ↓
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Background
The drm package is a component of the Linux Kernel that provides support for graphics drivers and display devices. It is responsible for managing access to graphics hardware and facilitating communication between user-space applications and the kernel. The drm_master_release() function is a part of this package and is used to release the master lock held by a DRM (Direct Rendering Manager) master. This vulnerability in drm_master_release() allows for unauthorized access to a pointer, potentially leading to security breaches.
Vulnerability Detail
The vulnerability in drm_master_release() arises from a lack of proper locking of a pointer. This can be exploited by an attacker to gain unauthorized access to the pointer, potentially allowing them to modify critical data structures or execute arbitrary code. The impact of this vulnerability depends on the specific context in which it is exploited, but it has the potential to lead to privilege escalation, denial of service, or information disclosure. The vulnerability has been fixed in Linux Kernel version v4.14.237 by commit b235f1037c0f9253ae45ff440a33a93e964ad2ec.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround mentioned for this vulnerability.
Conclusion
In conclusion, the vulnerability in drm_master_release() in the drm package of the Linux Kernel can allow unauthorized access to a pointer, potentially leading to security breaches. It is crucial to update the Linux Kernel to version v4.14.237 or later to mitigate this vulnerability. For further support on vulnerability remediation, you can reach out to DevNack.com.
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FAQ
The impact of this vulnerability depends on the specific context in which it is exploited. It has the potential to lead to privilege escalation, denial of service, or information disclosure.
Yes, this vulnerability has been fixed in Linux Kernel version v4.14.237 by commit b235f1037c0f9253ae45ff440a33a93e964ad2ec.
To update the Linux Kernel, you can pull the latest updates from the official Linux Kernel repository (https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/) and apply the necessary patches.
No, there is no specific workaround mentioned for this vulnerability.
You can find more information about this vulnerability in the Open Source Vulnerability database (https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1000xxx/UVI-2021-1000856.json).
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