Buffer Overflow Vulnerability in Linux Kernel: CVE-2025-38702
Summary
CVE-2025-38702: In the Linux kernel, the following vulnerability has been resolved: fbdev: fix potential buffer overflow in do_register_framebuffer() The current implementation may lead to buffer overflow when: 1. 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 the core component of many operating systems, responsible for managing hardware resources and providing essential services to software applications. It is known for its stability, performance, and flexibility, making it a popular choice for servers, desktops, and embedded systems. However, like any complex software, it is susceptible to vulnerabilities that can compromise system security.
Vulnerability Detail
CVE-2025-38702 is a buffer overflow vulnerability found in the Linux kernel's framebuffer (fbdev) subsystem. This issue arises when the unregistration process creates NULL gaps in the registered framebuffer array, leading to potential out-of-bounds access. Specifically, if all array slots are occupied while the number of registered framebuffers is less than the maximum allowed, the registration loop may exceed the array bounds, resulting in a buffer overflow. This vulnerability could allow an attacker to execute arbitrary code or crash the system, posing significant security risks.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
Currently, no specific workarounds are provided for this vulnerability. It is recommended to apply the patch as soon as it is available.
Conclusion
CVE-2025-38702 is a critical buffer overflow vulnerability in the Linux kernel that poses significant security risks. Users are advised to update their systems to the patched versions as soon as they become available to mitigate potential threats.
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FAQ
CVE-2025-38702 is a buffer overflow vulnerability in the Linux kernel's framebuffer subsystem that can lead to system crashes or arbitrary code execution.
You can use Vulert to monitor and alert for open-source vulnerabilities in your software. Check your application against CVE-2025-38702 using the Vulert playground without any signup.
Exploiting this vulnerability could allow an attacker to execute arbitrary code or crash the system, leading to potential data loss or unauthorized access.
To update your Linux package, run the command: sudo apt-get update && sudo apt-get install linux, ensuring you install the patched version.
Currently, there are no specific workarounds available. It is crucial to apply the patch as soon as it is released.
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