Vulnerability in Kernel: tty_buffer Softlockup Issue in flush_to_ldisc
Summary
GSD-2021-1002267: tty: tty_buffer: Fix the softlockup issue in flush_to_ldisc. Affects Kernel versions < d491c84df5c469dd9621863b6a770b3428137063. No fix is published. How to fix ↓
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Background
The Kernel is a crucial component of the Linux operating system, responsible for managing system resources and facilitating communication between hardware and software. It provides essential functionalities such as process management, memory management, and device drivers. The vulnerability in focus affects the tty_buffer module, which handles input and output buffering for terminal devices. This vulnerability can lead to a softlockup issue in the flush_to_ldisc function, potentially causing system instability and denial of service.
Vulnerability Detail
The vulnerability arises from a flaw in the tty_buffer module's flush_to_ldisc function. When processing data from terminal devices, the function fails to properly handle certain scenarios, resulting in a softlockup. This can be exploited by an attacker to disrupt system operations and potentially execute a denial of service attack. 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
No specific workaround has been mentioned for this vulnerability.
Conclusion
The vulnerability in the Kernel's tty_buffer module can lead to a softlockup issue in the flush_to_ldisc function, potentially causing system instability and denial of service. It is crucial to update the Kernel to version v5.4.162 or a later release to mitigate this vulnerability. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The vulnerability can lead to a softlockup issue in the flush_to_ldisc function of the tty_buffer module. This can result in system instability and denial of service.
By triggering the flawed code path in the flush_to_ldisc function, an attacker can cause a softlockup, disrupting system operations and potentially executing a denial of service attack.
No, the impact and attack plausibility of this vulnerability have not been proven yet.
The vulnerability has been fixed in Linux Kernel version v5.4.162 and later releases.
For more details about this vulnerability, you can refer to the source link provided in the database-specific information section of the vulnerability report.
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