Use-After-Initialization in Linux RDMA irdma QP Cleanup

Publication date: 2026-04-22

Last updated on: 2026-04-28

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/irdma: Initialize free_qp completion before using it In irdma_create_qp, if ib_copy_to_udata fails, it will call irdma_destroy_qp to clean up which will attempt to wait on the free_qp completion, which is not initialized yet. Fix this by initializing the completion before the ib_copy_to_udata call.

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Meta Information

Published

2026-04-22

Last Modified

2026-04-28

Generated

2026-07-06

AI Q&A

2026-04-22

EPSS Evaluated

2026-07-05

NVD

CVE-2026-31492

EUVD

EUVD-2026-24862

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	5.14
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	From 6.13 (inc) to 6.18.21 (exc)
linux	linux_kernel	From 6.19 (inc) to 6.19.11 (exc)
linux	linux_kernel	From 6.2 (inc) to 6.6.131 (exc)
linux	linux_kernel	From 6.7 (inc) to 6.12.80 (exc)
linux	linux_kernel	From 5.14.1 (inc) to 6.1.168 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-908	The product uses or accesses a resource that has not been initialized.

Attack-Flow Graph

Executive Summary

This vulnerability exists in the Linux kernel's RDMA/irdma component. Specifically, during the creation of a queue pair (qp) in the function irdma_create_qp, if the function ib_copy_to_udata fails, the cleanup function irdma_destroy_qp is called. This cleanup attempts to wait on a completion object called free_qp, but this completion is not initialized before use, which can lead to undefined behavior or errors. The fix involves initializing the free_qp completion before the ib_copy_to_udata call to ensure proper handling.

Impact Analysis

If this vulnerability is triggered, it could cause improper cleanup during queue pair creation failures in the RDMA/irdma subsystem of the Linux kernel. This might lead to system instability, crashes, or resource leaks due to waiting on an uninitialized completion object.

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