net/smc: Fix 'workqueue leaked lock' in smc_conn_abort_work
Summary
UVI-2021-1001671: net/smc: fix 'workqueue leaked lock' in smc_conn_abort_work. Affects Kernel versions >= b286a0651e4404ab96cdfdcdad8a839a26b3751e, < b4561bd29e62b24b245a53391e64b6880f0792cc. No fix is published. How to fix ↓
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Background
The net/smc package is a part of the Linux Kernel ecosystem. It provides functionality for the SMC (System Management Controller) protocol, which is used for communication between systems. The package includes various components for establishing and managing SMC connections. One of these components is smc_conn_abort_work, which handles the aborting of SMC connections. However, a vulnerability has been discovered in this component that can lead to a 'workqueue leaked lock' issue.
Vulnerability Detail
The vulnerability in smc_conn_abort_work arises from a workqueue leaked lock. When aborting an SMC connection, the workqueue lock is not properly released, leading to a resource leak. This vulnerability can potentially be exploited by an attacker to cause resource exhaustion or denial of service. The impact and attack plausibility of this vulnerability have not been proven yet. The vulnerability was introduced in Linux Kernel version v5.8 by commit b286a0651e4404ab96cdfdcdad8a839a26b3751e and has been fixed in version v5.10.70 by commit b4561bd29e62b24b245a53391e64b6880f0792cc.
How To Fix
No fixed version is published for this vulnerability.
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Conclusion
The net/smc package in the Linux Kernel is vulnerable to a 'workqueue leaked lock' issue in the smc_conn_abort_work component. This vulnerability can potentially lead to resource exhaustion or denial of service. It is recommended to update the Linux Kernel to version v5.10.70 or later to mitigate this vulnerability. For further support on vulnerability remediation, you can contact DevNack.com.
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FAQ
The impact of this vulnerability is not yet proven. However, it has the potential to cause resource exhaustion or denial of service.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your package-lock.json file, and Vulert will provide real-time monitoring and alerts for open-source vulnerabilities.
No specific workaround has been provided for this vulnerability. It is recommended to update the Linux Kernel to the fixed version.
The remote exploitability of this vulnerability has not been determined yet. Further analysis is required to assess the potential for remote exploitation.
You can find more information about this vulnerability in the Open Source Vulnerability database. The specific vulnerability ID is UVI-2021-1001671.
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