RDMA/cma: Use correct address when leaving multicast group in Linux Kernel

Kernel Updated 02 Oct 2025

Summary

18/02/2022

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2022-1000224: RDMA/cma: Use correct address when leaving multicast group. Affects Kernel versions >= b5de0c60cc30c2a3513c7188c73f3f29acc29234, < 371979069a577ee5bc1bcaaa39fb53d9e4dc7e3f. No fix is published. How to fix ↓

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Background

The Linux Kernel is a widely used open-source operating system kernel that serves as the foundation for various Linux distributions. It provides essential functionality for hardware abstraction, process management, memory management, and device drivers. RDMA (Remote Direct Memory Access) is a technology that allows for high-speed data transfer between remote systems without involving the CPU. RDMA/cma (RDMA Connection Manager) is a component of the Linux Kernel that manages RDMA connections. It provides APIs for creating, managing, and destroying RDMA connections. However, a vulnerability has been discovered in RDMA/cma that could potentially lead to security issues.

Vulnerability Detail

The vulnerability in RDMA/cma arises from the incorrect usage of addresses when leaving a multicast group. When a system is part of a multicast group, it receives multicast traffic destined for that group. However, when leaving the group, RDMA/cma does not use the correct address, which can result in unexpected behavior or security vulnerabilities. The impact and attack plausibility of this vulnerability have not been proven yet. It is important to note that this vulnerability has been fixed in Linux Kernel version v5.10.99 by commit 371979069a577ee5bc1bcaaa39fb53d9e4dc7e3f. The vulnerability was introduced in version v5.10 by commit b5de0c60cc30c2a3513c7188c73f3f29acc29234.

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 that involves the incorrect usage of addresses when leaving a multicast group has been identified and fixed in Linux Kernel version v5.10.99. Users are advised to update their Linux Kernel to the fixed version to mitigate any potential security risks. For further support on vulnerability remediation, please contact DevNack.com.

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