Critical NULL Dereference Vulnerability in Linux Kernel - CVE-2023-53209
Summary
CVE-2023-53209: In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211_hwsim: Fix possible NULL dereference In a call to mac80211_hwsim_select_tx_link() the sta pointer might be NULL, thus need to check that... Affects linux versions 5.10.103-1 – 6.9.9-1. No fix is published. How to fix ↓
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Background
The Linux kernel is the core component of many operating systems, managing hardware and system resources. It provides essential services for all other parts of the operating system, including device drivers, file systems, and system calls. The kernel is crucial for system stability and security, making it a prime target for vulnerabilities. CVE-2023-53209 specifically affects the mac80211_hwsim module, which is responsible for simulating wireless devices in a virtual environment.
Vulnerability Detail
CVE-2023-53209 is a vulnerability in the Linux kernel that arises from a potential NULL dereference in the mac80211_hwsim module. When the function mac80211_hwsim_select_tx_link() is called, the 'sta' pointer may be NULL, leading to a crash or unexpected behavior if accessed without proper checks. This vulnerability can compromise system stability and may be exploited to cause denial of service or other unintended consequences.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
Currently, there are no specific workarounds mentioned for this vulnerability. It is advisable to apply the patch as soon as it is available to mitigate any risks associated with this issue.
Conclusion
CVE-2023-53209 is a significant vulnerability in the Linux kernel that can lead to system instability due to a potential NULL dereference. It is crucial to apply the available patches to mitigate risks and ensure system security.
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FAQ
CVE-2023-53209 is a vulnerability in the Linux kernel that can lead to a NULL dereference in the mac80211_hwsim module.
This vulnerability can cause system instability and may lead to denial of service if exploited.
The vulnerability affects Linux packages in Debian 11, 12, 13, and 14.
You can use Vulert to monitor and alert for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected.
Yes, patches are available for the affected versions of the Linux package. Ensure to update to the specified patched versions.
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