CVE-2026-46125
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wifi: mac80211 Station Use-After-Free Fix

Publication date: 2026-05-28

Last updated on: 2026-05-30

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: remove station if connection prep fails If connection preparation fails for MLO connections, then the interface is completely reset to non-MLD. In this case, we must not keep the station since it's related to the link of the vif being removed. Delete an existing station. Any "new_sta" is already being removed, so that doesn't need changes. This fixes a use-after-free/double-free in debugfs if that's enabled, because a vif going from MLD (and to MLD, but that's not relevant here) recreates its entire debugfs.
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Meta Information
Published
2026-05-28
Last Modified
2026-05-30
Generated
2026-06-17
AI Q&A
2026-05-28
EPSS Evaluated
2026-06-16
NVD
CVE-2026-46125
EUVD
EUVD-2026-32884
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *
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Exploitability
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KEV
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability exists in the Linux kernel's wifi mac80211 component. When connection preparation fails for Multi-Link Operation (MLO) connections, the network interface is reset to a non-Multi-Link Device (MLD) state. In this scenario, the station associated with the virtual interface (vif) being removed must also be deleted. Failure to do so leads to a use-after-free or double-free error in debugfs if debugfs is enabled, because the vif's debugfs entries are recreated during this transition.

Mitigation Strategies

The vulnerability is fixed by removing the station if connection preparation for MLO connections fails, preventing use-after-free or double-free errors in debugfs.

To mitigate this vulnerability, ensure your Linux kernel is updated to a version that includes this fix.

Impact Analysis

The vulnerability can cause memory corruption issues such as use-after-free or double-free errors in the Linux kernel's debugfs subsystem when handling wifi MLO connections. This can potentially lead to system instability, crashes, or unexpected behavior in the network stack, especially if debugfs is enabled.

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