Vulnerability in mac80211-hwsim: Late Beacon Hrtimer Handling
Summary
GSD-2021-1001595: mac80211-hwsim: fix late beacon hrtimer handling. Affects Kernel versions >= 01e59e467ecf976c782eecd4dc99644802cc60e2, < 9bee85de2c8155388c09a2e1530a243ec1c96f05. No fix is published. How to fix ↓
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Background
mac80211-hwsim is a module in the Linux Kernel that provides a software simulation of wireless devices for testing and development purposes. It allows users to create virtual wireless interfaces and simulate various wireless scenarios. The module is an essential component of the Linux Kernel and is widely used in the Linux ecosystem.
Vulnerability Detail
The vulnerability identified in mac80211-hwsim relates to the handling of late beacon hrtimers. A hrtimer is a high-resolution timer used in the Linux Kernel for precise timing operations. In this case, the hrtimer responsible for managing beacons in mac80211-hwsim can experience a delay, leading to incorrect timing of beacon transmissions. This timing issue can potentially disrupt wireless communication and impact the overall functionality of the simulated wireless devices. The vulnerability was introduced in version v3.9 of the Linux Kernel and has been fixed in version v5.4.151.
How To Fix
No fixed version is published for this vulnerability.
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Conclusion
The vulnerability in mac80211-hwsim related to late beacon hrtimer handling can cause timing issues and disrupt wireless communication in simulated wireless devices. It is recommended to update the Linux Kernel to version v5.4.151 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
mac80211-hwsim is a module in the Linux Kernel that provides a software simulation of wireless devices for testing and development purposes. It allows users to create virtual wireless interfaces and simulate various wireless scenarios.
A hrtimer is a high-resolution timer used in the Linux Kernel for precise timing operations. It provides accurate timing capabilities for various tasks within the Kernel.
The late beacon hrtimer handling vulnerability in mac80211-hwsim can result in incorrect timing of beacon transmissions. This timing issue can disrupt wireless communication and impact the overall functionality of the simulated wireless devices.
The vulnerability was introduced in version v3.9 of the Linux Kernel.
Yes, the vulnerability has been fixed in version v5.4.151 of the Linux Kernel.
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