RDMA/cma: Fix listener leak in rdma_cma_listen_on_all() failure

Kernel Updated 02 Oct 2025

Summary

19/10/2021

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2021-1001651: RDMA/cma: Fix listener leak in rdma_cma_listen_on_all() failure. Affects Kernel versions >= 70ba8b1697e35c04ea5f22edb6e401aeb1208d96, < 3f4e68902d2e545033c80d7ad62fd9a439e573f4. No fix is published. How to fix ↓

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Background

The RDMA/cma package is a component of the Linux Kernel that provides support for Remote Direct Memory Access (RDMA) and Connection Manager (CM) functionality. RDMA allows for high-speed data transfer between remote systems with low latency and CPU overhead. The Connection Manager is responsible for managing the establishment and termination of RDMA connections. This vulnerability affects the listener functionality in RDMA/cma.

Vulnerability Detail

The vulnerability in RDMA/cma is related to a listener leak that occurs when the rdma_cma_listen_on_all() function fails. This function is responsible for setting up a listener on all available network interfaces. When the function fails, it does not properly clean up the listener, leading to a resource leak. An attacker could potentially exploit this vulnerability to exhaust system resources and cause a denial-of-service (DoS) condition. The vulnerability was introduced in version v5.10.4 of the Linux Kernel and has been fixed in version v5.10.71.

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

The vulnerability in RDMA/cma related to a listener leak has been identified and fixed in Linux Kernel version v5.10.71. It is recommended to update the Linux Kernel to the latest version to mitigate the risk of exploitation. For further support on vulnerability remediation, please contact DevNack.com.

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