CVE-2026-46189
Analyzed Analyzed - Analysis Complete
Double Free in Linux Kernel RDMA/vmw_pvrdma Driver

Publication date: 2026-05-28

Last updated on: 2026-06-11

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.
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Meta Information
Published
2026-05-28
Last Modified
2026-06-11
Generated
2026-06-17
AI Q&A
2026-05-28
EPSS Evaluated
2026-06-16
NVD
CVE-2026-46189
EUVD
EUVD-2026-32816
Affected Vendors & Products
Showing 9 associated CPEs
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)
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-415 The product calls free() twice on the same memory address.
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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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