Critical Null Pointer Dereference Vulnerability in Linux Kernel Package
Summary
DEBIAN-CVE-2025-37793: In the Linux kernel, the following vulnerability has been resolved: ASoC: Intel: avs: Fix null-ptr-deref in avs_component_probe() devm_kasprintf() returns NULL when memory allocation fails. Affects linux versions < 6.12.25-1. Fixed in 6.12.25-1. How to fix ↓
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Background
The Linux kernel is the core component of many operating systems, providing essential services for hardware and software interaction. It is known for its robustness, flexibility, and wide adoption across various platforms. However, like any complex software, it is not immune to vulnerabilities. The specific issue at hand involves the ASoC (ALSA System on Chip) subsystem, particularly in the Intel AVS (Audio Virtualization Suite) component, which is responsible for audio processing in Intel hardware.
Vulnerability Detail
In the Linux kernel, a vulnerability has been identified in the ASoC: Intel: avs component, specifically in the avs_component_probe() function. The issue arises when the devm_kasprintf() function fails to allocate memory, returning NULL. The current implementation does not check for this NULL return value, leading to a potential NULL pointer dereference. This can cause system crashes or unpredictable behavior, impacting the stability and security of the affected systems.
How To Fix
Minimum fixed version
6.12.25-1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade linuxTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
Currently, there are no specific workarounds mentioned for this vulnerability. However, users are advised to monitor their systems for any unusual behavior and apply the patch as soon as it becomes available.
Conclusion
The identified vulnerability in the Linux kernel's ASoC: Intel: avs component poses a significant risk due to the potential for NULL pointer dereference. Users are urged to update their systems to the patched version 6.12.25-1 to mitigate this risk. Regular monitoring and timely updates are essential for maintaining system security.
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FAQ
A NULL pointer dereference occurs when a program attempts to access memory that has not been allocated or is set to NULL, leading to crashes or unexpected behavior.
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The potential impacts include system crashes, data loss, and exploitation by malicious actors, which can compromise system integrity and security.
This vulnerability affects the Linux kernel across various distributions, particularly those using the affected versions of the kernel.
It is recommended to regularly check for updates and apply them promptly to ensure your system is protected against known vulnerabilities.
References
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