Buffer Overflow Vulnerability in Linux Kernel's dell-wmi-sysman Package
Summary
CVE-2025-38077: In the Linux kernel, the following vulnerability has been resolved: platform/x86: dell-wmi-sysman: Avoid buffer overflow in current_password_store() If the 'buf' array received from the user contains an empty string, the... Affects linux versions < 6.1.147-1. Fixed in 6.1.147-1. How to fix ↓
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Background
The Linux kernel is the core component of the Linux operating system, responsible for managing system resources and hardware interactions. The dell-wmi-sysman module is specifically designed for Dell systems, facilitating communication between the operating system and Dell hardware features. This module is crucial for ensuring that Dell-specific functionalities operate smoothly. However, it is susceptible to a buffer overflow vulnerability that can compromise system integrity and security.
Vulnerability Detail
In the Linux kernel, a vulnerability has been identified in the dell-wmi-sysman module where the function current_password_store() does not adequately check for empty strings in the user-provided 'buf' array. If an empty string is passed, the 'length' variable becomes zero, leading to an attempt to access 'buf[length - 1]', which results in a buffer overflow. This flaw could allow an attacker to exploit the system, potentially leading to unauthorized access or system crashes.
How To Fix
Minimum fixed version
6.1.147-1
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. It is recommended to apply the patch as soon as it becomes available.
Conclusion
The CVE-2025-38077 vulnerability in the Linux kernel's dell-wmi-sysman module poses a significant risk due to a buffer overflow issue. It is essential for users to update their systems to the patched version to protect against potential exploitation. Monitoring tools like Vulert can assist in identifying vulnerabilities in your applications.
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FAQ
CVE-2025-38077 is a vulnerability in the Linux kernel's dell-wmi-sysman module that can lead to a buffer overflow due to inadequate checks for empty strings.
Exploitation of this vulnerability could allow attackers to gain unauthorized access or cause system instability, potentially leading to data loss or corruption.
Yes, a patch is available for Debian 13 in version 6.12.32-1. Users of Debian 12 should monitor for updates.
While there are no specific workarounds, it is crucial to prioritize applying the patch as soon as possible to mitigate risks.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. You can check your application using the Vulert playground without any signup at Vulert Scanner.
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