Critical Vulnerability in Linux Kernel: iwlwifi Read Pointer Issue
Summary
DEBIAN-CVE-2024-36922: In the Linux kernel, the following vulnerability has been resolved: wifi: iwlwifi: read txq->read_ptr under lock If we read txq->read_ptr without lock, we can read the same value twice, then obtain the lock, and reclaim... Affects linux versions < 6.8.11-1. Fixed in 6.8.11-1. How to fix ↓
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Background
The Linux kernel is the core component of many operating systems, including Debian. It manages hardware resources and provides essential services for software applications. The iwlwifi driver is responsible for managing Intel wireless network adapters. This vulnerability affects the way the driver handles read operations on the transmission queue, potentially leading to data integrity issues.
Vulnerability Detail
In the Linux kernel, a vulnerability has been identified in the iwlwifi driver where the read operation of the txq->read_ptr can occur without proper locking mechanisms. This flaw allows the same value to be read multiple times before the lock is acquired, leading to the possibility of reclaiming the same entry twice. This can trigger a WARN_ONCE() warning later in the process, indicating a potential data corruption issue. The vulnerability is classified as DEBIAN-CVE-2024-36922 and affects both Debian 13 and 14 versions of the Linux package.
How To Fix
Minimum fixed version
6.8.11-1
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 as soon as it is available.
Conclusion
The vulnerability identified as DEBIAN-CVE-2024-36922 in the Linux kernel's iwlwifi driver poses a significant risk due to improper handling of read operations. It is essential to update to the patched version 6.8.11-1 to secure your system against potential data integrity issues.
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FAQ
DEBIAN-CVE-2024-36922 is a vulnerability in the Linux kernel's iwlwifi driver that allows improper handling of read operations, potentially leading to data integrity issues.
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 by this vulnerability.
If exploited, this vulnerability could lead to data corruption and system instability, as the same data entry may be processed multiple times.
Yes, a patch is available in version 6.8.11-1 of the Linux package. It is recommended to update to this version to mitigate the vulnerability.
While there are no specific workarounds, it is crucial to monitor your system for any unusual behavior and apply the patch as soon as possible.
References
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