Critical Vulnerability in Linux Kernel: CVE-2025-40030 - Potential NULL Pointer Dereference
Summary
DEBIAN-CVE-2025-40030: In the Linux kernel, the following vulnerability has been resolved: pinctrl: check the return value of pinmux_ops::get_function_name() While the API contract in docs doesn't specify it explicitly, the generic implementat... 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 many operating systems, providing essential services for hardware management and system resources. It is known for its stability, performance, and security features. However, vulnerabilities can arise due to complex interactions within its codebase. CVE-2025-40030 specifically affects the pinctrl subsystem, which manages pin multiplexing for various hardware functions. This vulnerability could lead to system instability or crashes if not addressed.
Vulnerability Detail
CVE-2025-40030 is a vulnerability in the Linux kernel's pinctrl subsystem, where the function pinmux_ops::get_function_name() can return a NULL pointer. This situation occurs when the generic implementation fails, leading to a potential NULL pointer dereference in the pinmux_func_name_to_selector() function. If exploited, this could cause a denial of service or system crash, impacting the overall reliability of systems using the affected kernel versions.
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 available patches as soon as they are released.
Conclusion
CVE-2025-40030 is a significant vulnerability in the Linux kernel that requires immediate attention. Users are advised to update their systems to the latest patched versions to mitigate the risks associated with this issue. Regular updates and monitoring for vulnerabilities are essential for maintaining system security.
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FAQ
CVE-2025-40030 is a vulnerability in the Linux kernel that can lead to a NULL pointer dereference, potentially causing system crashes.
You can use the Vulert platform to check if your application is affected by this vulnerability without needing to install any software. Just upload your manifest file.
Exploiting this vulnerability could lead to system instability, crashes, or denial of service, affecting the reliability of systems using the vulnerable kernel.
It is recommended to regularly check for updates and apply them promptly to ensure that your system is protected against known vulnerabilities.
Detailed information about CVE-2025-40030 can be found in the official Debian security advisories and on the Vulert website.
References
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