NULL pointer dereference crash on unload in drm: mxsfb
Summary
GSD-2021-1001868: drm: mxsfb: Fix NULL pointer dereference crash on unload. Affects Kernel versions >= ae1ed0093281939b80664a687689f12436c0e874, < b0e6db0656ddfd8bb57303c2ef61ee1c1cc694a8. No fix is published. How to fix ↓
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Background
The drm: mxsfb package is a component of the Linux Kernel, which is responsible for managing display and graphics functionality. It provides support for the MXSFB display controller found in various embedded systems. The vulnerability in question involves a NULL pointer dereference crash that occurs during the unload process of the mxsfb driver.
Vulnerability Detail
The vulnerability arises from a NULL pointer dereference issue in the mxsfb driver. When unloading the driver, a NULL pointer is accessed, leading to a crash. This vulnerability can be exploited by an attacker with local access to the system to cause a denial-of-service (DoS) condition. The impact of this vulnerability has not been proven, but it has the potential to disrupt the display functionality of affected systems.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround provided for this vulnerability. However, users can mitigate the risk by ensuring that only trusted individuals have local access to the system.
Conclusion
In conclusion, the NULL pointer dereference crash on unload vulnerability in the drm: mxsfb package of the Linux Kernel can be mitigated by updating to version v5.14.15 or later. This update resolves the issue and ensures the proper functioning of the display controller. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability is a potential denial-of-service (DoS) condition, which can disrupt the display functionality of affected systems.
An attacker with local access to the system can exploit this vulnerability by triggering the NULL pointer dereference crash during the unload process of the mxsfb driver.
No, remote exploitation of this vulnerability is not possible as it requires local access to the system.
There is no evidence of this vulnerability being exploited in the wild at the time of this report.
The recommended solution is to update the Linux Kernel to version v5.14.15 or later, which includes the fix for this vulnerability.
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