Out-of-Bounds Access Vulnerability in Linux Kernel - Debian Packages
Summary
DEBIAN-CVE-2024-50129: In the Linux kernel, the following vulnerability has been resolved: net: pse-pd: Fix out of bound for loop Adjust the loop limit to prevent out-of-bounds access when iterating over PI structures. Affects linux versions < 6.11.6-1. Fixed in 6.11.6-1. How to fix ↓
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Background
The Linux kernel is the core component of the Debian operating system, responsible for managing hardware resources and providing essential services for software applications. It is known for its stability, performance, and security features. However, like any complex software, it can have vulnerabilities that may expose systems to risks. This specific vulnerability affects the Linux package in Debian versions 13 and 14, highlighting the importance of maintaining up-to-date software to mitigate security risks.
Vulnerability Detail
In the Linux kernel, a vulnerability was identified in the net subsystem related to the pse-pd functionality. The issue arises from an out-of-bounds access during the iteration over PI structures. Specifically, the loop limit was incorrectly set, allowing the loop to potentially reach an index beyond the allocated number of PI structures (pcdev->nr_lines). This could lead to undefined behavior, including crashes or exploitation by malicious actors, emphasizing the need for careful bounds checking in code.
How To Fix
Minimum fixed version
6.11.6-1
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 provided for this vulnerability. The best course of action is to apply the patch by updating the Linux package as mentioned above.
Conclusion
The out-of-bounds access vulnerability in the Linux kernel poses significant risks to systems running affected Debian packages. Users are strongly encouraged to update their Linux packages to the patched version 6.11.6-1 to ensure their systems remain secure. Utilizing tools like Vulert can help monitor for such vulnerabilities in real-time.
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FAQ
The vulnerability is an out-of-bounds access issue in the Linux kernel's net subsystem, which can lead to undefined behavior.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected without any signup.
Exploitation of this vulnerability could lead to system crashes or allow attackers to execute arbitrary code, compromising system integrity.
Yes, the vulnerability is fixed in version 6.11.6-1 of the Linux package for both Debian 13 and 14.
While there are no specific workarounds, it is crucial to prioritize updating your system as soon as possible to mitigate the risks associated with this vulnerability.
References
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