Underflow Vulnerability in RDMA/nldev

Kernel Updated 02 Oct 2025

Summary

24/04/2022

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2022-1001197: RDMA/nldev: Prevent underflow in nldev_stat_set_counter_dynamic_doit(). Affects Kernel versions >= 3c3c1f1416392382faa0238e76a70d7810aab2ef, < 2a495ef04d5f42e6f00eb2bec1ee9075e3d5a771. No fix is published. How to fix ↓

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Background

RDMA (Remote Direct Memory Access) is a feature in the Linux Kernel that allows for high-speed data transfer between remote systems. It is commonly used in high-performance computing and networking applications. The nldev (Netlink Device) is a component of RDMA that provides a user-space interface for managing RDMA devices. This vulnerability affects the nldev component in the Linux Kernel.

Vulnerability Detail

The vulnerability in RDMA/nldev is caused by an underflow in the nldev_stat_set_counter_dynamic_doit() function. This underflow can lead to memory corruption or other undefined behavior, potentially allowing an attacker to execute arbitrary code or crash the system. The vulnerability was introduced in version v5.16 of the Linux Kernel and is fixed in version v5.17.2.

How To Fix

No fixed version is published for this vulnerability.

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Workaround

There is no known workaround for this vulnerability. It is recommended to apply the fix by updating the Linux Kernel.

Conclusion

The vulnerability in RDMA/nldev can be mitigated by updating the Linux Kernel to version v5.17.2 or later. For further support on vulnerability remediation, please contact DevNack.com.

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