Vulnerability in Kernel: Change down_interruptible() in virt_efi_reset_system() to down_trylock()
Summary
GSD-2021-1001812: efi: Change down_interruptible() in virt_efi_reset_system() to down_trylock(). Affects Kernel versions < 853985927c5629bbe43e3f1abb9a5c673b86bd61. No fix is published. How to fix ↓
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Background
The Kernel is a crucial component of the Linux operating system that manages system resources and facilitates communication between hardware and software. It provides essential functionalities such as process management, memory management, and device drivers. The vulnerability in question affects the Kernel's virt_efi_reset_system() function, which is responsible for resetting the system in a virtualized environment.
Vulnerability Detail
The vulnerability arises from the use of down_interruptible() in virt_efi_reset_system() instead of down_trylock(). This can potentially lead to a deadlock situation, where the system becomes unresponsive and fails to reset properly. An attacker may exploit this vulnerability to cause a denial-of-service (DoS) condition or disrupt the normal operation of the system. The impact and attack plausibility of this vulnerability have not been proven yet.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no specific workaround mentioned for this vulnerability.
Conclusion
In conclusion, the vulnerability in the Kernel's virt_efi_reset_system() function can potentially lead to a deadlock situation and disrupt the normal operation of the system. It is recommended to update the Linux Kernel to version v4.19.213 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability can range from a denial-of-service (DoS) condition to a disruption in the normal operation of the system.
An attacker may exploit this vulnerability to cause a deadlock situation, rendering the system unresponsive and failing to reset properly.
No, the impact and attack plausibility of this vulnerability have not been proven yet.
To fix this vulnerability, update the Linux Kernel to version v4.19.213 or later, which includes the necessary fix.
No specific workaround has been mentioned for this vulnerability.
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