CVE-2026-46125

Undergoing Analysis Undergoing Analysis - In Progress

wifi: mac80211 Station Use-After-Free Fix

Publication date: 2026-05-28

Last updated on: 2026-06-30

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.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-05-28

Last Modified

2026-06-30

Generated

2026-07-08

AI Q&A

2026-05-28

EPSS Evaluated

2026-07-06

NVD

CVE-2026-46125

EUVD

EUVD-2026-32884

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 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 6.0 (inc) to 6.1.176 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-825	The product dereferences a pointer that contains a location for memory that was previously valid, but is no longer valid.
CWE-416	The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Attack-Flow Graph

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.

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.

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.

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