Critical Vulnerability in Linux Kernel: Improper Initialization of Work Context Pointers
Summary
CVE-2025-38408: In the Linux kernel, the following vulnerability has been resolved: genirq/irq_sim: Initialize work context pointers properly Initialize ops member's pointers properly by using kzalloc() instead of kmalloc() when allocat... 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, vulnerabilities can arise, such as the one identified in this report, which affects the kernel's handling of work context pointers, potentially leading to system instability or security breaches.
Vulnerability Detail
In the Linux kernel, a vulnerability has been identified in the genirq/irq_sim module, where the 'ops' member's pointers are not properly initialized. Instead of using kzalloc() to allocate memory for the simulation work context, kmalloc() is used, which can lead to pointers containing random data. This improper initialization can result in invalid dereferencing, causing crashes or exploitation by malicious actors.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
Currently, there are no specific workarounds mentioned for this vulnerability. The best course of action is to apply the patch as soon as it becomes available.
Conclusion
The vulnerability CVE-2025-38408 in the Linux kernel poses significant risks due to improper initialization of work context pointers. Users are strongly advised to update their systems to the patched version to ensure security and stability. Utilizing tools like Vulert can help monitor for such vulnerabilities in real-time.
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FAQ
CVE-2025-38408 is a vulnerability in the Linux kernel related to improper initialization of work context pointers, which can lead to system instability.
If exploited, this vulnerability could lead to crashes or allow attackers to execute arbitrary code, compromising system security.
Versions of the Linux kernel in Debian 11, 12, and 13 are affected. Users should check their kernel version to determine if they need to update.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in real-time. Visit Vulert Scanner to check your application without needing to sign up.
While there are no specific workarounds, it is crucial to plan for an update as soon as possible to mitigate the risk of exploitation.
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