Critical Memory Access Vulnerability in Linux Kernel: CVE-2025-38006
Summary
CVE-2025-38006: In the Linux kernel, the following vulnerability has been resolved: net: mctp: Don't access ifa_index when missing In mctp_dump_addrinfo, ifa_index can be used to filter interfaces, but only when the struct ifaddrmsg is... Affects linux versions 6.1.106-1 – 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, managing hardware and system resources. It provides essential services for all other parts of the operating system. The kernel's networking stack, including the MCTP (Management Component Transport Protocol) implementation, is crucial for communication between devices. This vulnerability arises from improper handling of uninitialized memory, potentially leading to security risks in network operations.
Vulnerability Detail
CVE-2025-38006 is a vulnerability in the Linux kernel's MCTP implementation, specifically in the mctp_dump_addrinfo function. The issue occurs when the ifa_index is accessed without a valid struct ifaddrmsg, leading to comparisons against uninitialized memory. This can be exploited in scenarios such as DHCP operations or when using commands like 'ip addr show'. The kernel has always filtered by ifa_index, meaning that existing userspace programs must provide a valid ifa_index value to function correctly. Failure to do so may result in undefined behavior or security breaches.
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. Users are advised to ensure that their applications provide a valid ifa_index when interacting with the MCTP implementation to avoid potential issues.
Conclusion
CVE-2025-38006 represents a significant vulnerability in the Linux kernel's MCTP implementation, stemming from improper memory access. Users are encouraged to update their systems to the latest patched versions to safeguard against potential exploits. Utilizing tools like Vulert can help monitor for such vulnerabilities effectively.
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FAQ
CVE-2025-38006 is a vulnerability in the Linux kernel's MCTP implementation that involves accessing uninitialized memory, potentially leading to security risks.
You can use the Vulert platform to monitor and alert for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected without any signup.
Exploiting this vulnerability may lead to undefined behavior in network operations, which could compromise system security and stability.
Yes, a patch is available for Debian 13 users in version 6.12.30-1. Users should update their packages to this version to mitigate the vulnerability.
While there are no specific workarounds, ensure that your applications provide a valid ifa_index when using the MCTP implementation to minimize risks.
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