CVE-2024-35932: linux-libc-dev - Kernel Vulnerability in drm/vc4
Summary
CVE-2024-35932: In the Linux kernel, the following vulnerability has been resolved: drm/vc4: don't check if plane->state->fb == state->fb Currently, when using non-blocking commits, we can see the following kernel warning: [ 110.908514]... Affects linux versions 5.10.103-1 – 6.9.9-1. No fix is published. How to fix ↓
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Background
The linux-libc-dev package is a component of the Linux kernel that provides the C library headers for system calls and other kernel interfaces. It is commonly used for developing applications that interact with the kernel. The vulnerability affects the drm/vc4 component of the kernel, which is responsible for managing the display hardware on certain devices. This vulnerability can lead to a use-after-free condition, potentially resulting in a system crash or other unexpected behavior.
Vulnerability Detail
The vulnerability in drm/vc4 arises from a check that compares the state of a plane's framebuffer (fb) with the state of the overall plane. Due to inconsistencies in the check, the refcount (reference count) for the framebuffer can be improperly incremented or decremented, leading to a use-after-free scenario. This can trigger a kernel warning and potentially cause instability or crashes. The vulnerability has a CVSS score of 5.5, indicating a medium severity level.
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. Users are advised to apply the recommended fix by updating the linux-libc-dev package.
Conclusion
The vulnerability in linux-libc-dev's drm/vc4 component can lead to a use-after-free condition, potentially causing system crashes or instability. It is crucial to update the linux-libc-dev package to version 6.1.90-1 or later to mitigate this vulnerability. For further assistance or support in vulnerability remediation, please contact DevNack.com.
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FAQ
Linux-libc-dev is a package that provides C library headers for system calls and other kernel interfaces in the Linux kernel.
Drm/vc4 is a component of the Linux kernel responsible for managing the display hardware on certain devices.
A use-after-free vulnerability occurs when a program continues to use a memory reference after it has been freed, potentially leading to crashes or other unexpected behavior.
CVSS (Common Vulnerability Scoring System) is a standardized method for assessing the severity of security vulnerabilities. The score ranges from 0 to 10, with higher scores indicating greater severity.
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