Double Free in Linux Kernel RDMA/vmw_pvrdma Driver

Publication date: 2026-05-28

Last updated on: 2026-07-07

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/vmw_pvrdma: Fix double free on pvrdma_alloc_ucontext() error path Sashiko points out that pvrdma_uar_free() is already called within pvrdma_dealloc_ucontext(), so calling it before triggers a double free.

CVSS Scores

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Meta Information

Published

2026-05-28

Last Modified

2026-07-07

Generated

2026-07-08

AI Q&A

2026-05-28

EPSS Evaluated

2026-07-06

NVD

CVE-2026-46189

EUVD

EUVD-2026-32816

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	7.1
linux	linux_kernel	7.1
linux	linux_kernel	From 6.13 (inc) to 6.18.30 (exc)
linux	linux_kernel	From 5.16 (inc) to 6.1.175 (exc)
linux	linux_kernel	From 5.11 (inc) to 5.15.209 (exc)
linux	linux_kernel	From 6.19 (inc) to 7.0.7 (exc)
linux	linux_kernel	From 6.7 (inc) to 6.12.88 (exc)
linux	linux_kernel	From 6.2 (inc) to 6.6.140 (exc)
linux	linux_kernel	From 4.10 (inc) to 5.10.258 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-415	The product calls free() twice on the same memory address.
CWE-1341	The product attempts to close or release a resource or handle more than once, without any successful open between the close operations.

Attack-Flow Graph

Executive Summary

This vulnerability exists in the Linux kernel's RDMA vmw_pvrdma component. It involves a double free error occurring in the function pvrdma_alloc_ucontext(). Specifically, the function pvrdma_uar_free() is called twice on the same resource because it is already called within pvrdma_dealloc_ucontext(), and calling it again before that leads to a double free condition.

Impact Analysis

A double free vulnerability can lead to undefined behavior such as memory corruption, crashes, or potential exploitation by attackers to execute arbitrary code or cause denial of service. In this case, the double free in the Linux kernel's RDMA vmw_pvrdma component could destabilize the system or be leveraged for privilege escalation or other malicious activities.

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