Memory Leak Vulnerability in Linux Kernel: fbdev sh7760fb Package
Summary
CVE-2024-56746: In the Linux kernel, the following vulnerability has been resolved: fbdev: sh7760fb: Fix a possible memory leak in sh7760fb_alloc_mem() When information such as info->screen_base is not ready, calling sh7760fb_free_mem()... 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 kernel is a core component of the operating system, responsible for managing hardware and system resources. The fbdev subsystem provides support for framebuffer devices, allowing graphics to be rendered on the screen. The sh7760fb driver is specifically designed for the SH7760 series of processors, facilitating the display output. This package is crucial for systems utilizing these processors, but it has been found to contain a vulnerability that can lead to memory leaks, impacting system performance and stability.
Vulnerability Detail
In the Linux kernel, specifically within the fbdev subsystem, a vulnerability has been identified in the sh7760fb driver. The issue arises when the function sh7760fb_alloc_mem() is called without the necessary information being ready, particularly info->screen_base. If this condition is met, the subsequent call to sh7760fb_free_mem() fails to properly release allocated memory, leading to a potential memory leak. This can result in increased memory consumption over time, potentially degrading system performance and causing instability. The vulnerability has been assigned a CVSS score of 5.5, indicating a moderate severity level.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
Currently, there are no specific workarounds provided for this vulnerability. The best course of action is to apply the available patches as soon as they are released.
Conclusion
The CVE-2024-56746 vulnerability in the Linux kernel's fbdev subsystem poses a risk of memory leaks that can affect system performance. It is essential to update to the patched versions of the Linux package to ensure system stability and security. Regular monitoring for vulnerabilities using tools like Vulert can help maintain the integrity of your software.
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FAQ
CVE-2024-56746 is a vulnerability in the Linux kernel's fbdev subsystem, specifically affecting the sh7760fb driver, which can lead to memory leaks.
This vulnerability can cause increased memory usage over time, potentially leading to system performance degradation and instability.
If you are using a version of the Linux kernel that includes the sh7760fb driver, you may be affected. You can check your application's vulnerability status using Vulert's playground at Vulert Scanner.
While there are no specific workarounds, it is crucial to plan for an update as soon as possible to mitigate the risks associated with this vulnerability.
More details can be found in the official CVE database and through security advisories related to the Linux kernel.
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