Critical Vulnerability in Linux Kernel: Uprobe PTE Overwrite Issue
Summary
CVE-2025-38207: In the Linux kernel, the following vulnerability has been resolved: mm: fix uprobe pte be overwritten when expanding vma Patch series "Fix uprobe pte be overwritten when expanding vma". 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, the kernel is susceptible to vulnerabilities that can compromise system integrity and security. This specific vulnerability affects various Debian versions of the Linux kernel, potentially leading to memory management issues.
Vulnerability Detail
In the Linux kernel, a vulnerability has been identified that allows for the uprobe page table entry (PTE) to be overwritten when expanding a virtual memory area (VMA). This issue arises during the remapping of memory regions, where the kernel fails to properly manage the uprobe PTE, leading to orphaned entries. The vulnerability was first discovered in version 6.6.y of the Linux kernel and can be triggered through a series of memory mapping operations. If exploited, this could lead to system instability and potential unauthorized access to memory regions.
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. However, users are advised to avoid performing the memory mapping operations that trigger the vulnerability until a patch is applied.
Conclusion
The identified vulnerability in the Linux kernel poses significant risks to system stability and security. Users are strongly encouraged to update their kernel to the latest patched version to mitigate these risks. Regular monitoring for vulnerabilities using tools like Vulert can help maintain system integrity.
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FAQ
The vulnerability involves the overwriting of uprobe page table entries in the Linux kernel during memory area expansions, which can lead to system instability.
The vulnerability affects various versions of the Linux kernel, specifically those in Debian 11, 12, and 13.
You can use tools like Vulert to monitor and alert for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected.
Yes, a patch has been released for the affected versions of the Linux kernel. Users should update their kernel to the latest version.
Exploitation of this vulnerability could lead to memory management issues, system crashes, and potential unauthorized access to sensitive data.
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