Use After Free Vulnerability in Linux Kernel - Debian Packages
Summary
DEBIAN-CVE-2024-41010: In the Linux kernel, the following vulnerability has been resolved: bpf: Fix too early release of tcx_entry Pedro Pinto and later independently also Hyunwoo Kim and Wongi Lee reported an issue that the tcx_entry can be r... Affects linux versions < 6.9.10-1. Fixed in 6.9.10-1. How to fix ↓
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Background
The Linux kernel is the core component of the Debian operating system, responsible for managing hardware and system resources. It provides essential services for all other software running on the system. This vulnerability affects Debian versions 13 and 14, specifically in the 'linux' package, which is crucial for system stability and performance.
Vulnerability Detail
In the Linux kernel, a vulnerability has been identified where the tcx_entry can be released too early, leading to a use after free (UAF) condition. This occurs when an ingress or clsact qdisc with a shared tc block is replaced, causing the system to access freed memory. The vulnerability can be triggered through a sequence of operations involving network namespaces and qdisc management, potentially leading to system instability or crashes.
How To Fix
Minimum fixed version
6.9.10-1
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, no specific workarounds are provided for this vulnerability. It is recommended to apply the patch as soon as it is available to mitigate any risks associated with the UAF condition.
Conclusion
The identified use after free vulnerability in the Linux kernel affects Debian versions 13 and 14, specifically in the 'linux' package. It is essential to update to the patched version 6.9.10-1 to protect your system from potential exploitation. Regular monitoring and prompt application of security updates are critical for maintaining system integrity.
See every vulnerability recorded for linux →
FAQ
A use after free vulnerability occurs when a program continues to use a memory location after it has been freed, potentially leading to crashes or arbitrary code execution.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. By uploading your manifest file like package-lock.json, you can check for vulnerabilities without needing to access the code.
Exploiting this vulnerability could lead to system crashes, instability, or unauthorized access to system resources, posing significant security risks.
While no specific workarounds are available, it is crucial to monitor your system and apply the patch as soon as it is released to minimize risks.
Detailed information about this vulnerability can be found in the official Debian CVE database and through security advisories related to the Linux kernel.
References
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