NULL pointer dereference in platform/x86: ideapad-laptop
Summary
GSD-2021-1000503: platform/x86: ideapad-laptop: fix a NULL pointer dereference. Affects Kernel versions >= ff36b0d953dc4cbc40a72945920ff8e805f1b0da, < beab753fe3b4e087411a850a64c6cd748544d8a1. No fix is published. How to fix ↓
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Background
The ideapad-laptop is a platform driver in the Linux Kernel that provides support for various features on Lenovo IdeaPad laptops. It handles functions such as controlling the keyboard backlight, enabling or disabling the touchpad, and managing the hotkeys. This vulnerability affects the ideapad-laptop driver in the x86 platform, leading to a NULL pointer dereference.
Vulnerability Detail
The vulnerability arises due to a NULL pointer dereference in the ideapad-laptop driver. When certain operations are performed on a Lenovo IdeaPad laptop, the driver fails to handle a NULL pointer properly, resulting in a crash or system instability. An attacker with local access to the affected system could potentially exploit this vulnerability to cause a denial-of-service (DoS) condition or execute arbitrary code with kernel privileges.
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 essential to apply the patch or update the Linux Kernel to mitigate the risk.
Conclusion
The NULL pointer dereference vulnerability in the platform/x86: ideapad-laptop driver can lead to system crashes or instability, potentially allowing an attacker to execute arbitrary code with kernel privileges. It is crucial to update the Linux Kernel to version v5.12.7 or later to mitigate this vulnerability. For further assistance or support in vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability can lead to a system crash or instability, potentially allowing an attacker to execute arbitrary code with kernel privileges.
Users of Lenovo IdeaPad laptops running a Linux Kernel version prior to v5.12.7 are affected by this vulnerability.
No, this vulnerability requires local access to the affected system.
There is no known public exploit for this vulnerability at the time of this report.
The only effective mitigation is to update the Linux Kernel to a version that includes the fix for this vulnerability.
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