CVE-2026-23040
Unknown Unknown - Not Provided

Null Pointer Dereference in Linux mac80211_hwsim Frequency Notification

Publication date: 2026-02-04

Last updated on: 2026-02-04

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211_hwsim: fix typo in frequency notification The NAN notification is for 5745 MHz which corresponds to channel 149 and not 5475 which is not actually a valid channel. This could result in a NULL pointer dereference in cfg80211_next_nan_dw_notif.

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Meta Information

Published
2026-02-04
Last Modified
2026-02-04
Generated
2026-07-06
AI Q&A
2026-02-04
EPSS Evaluated
2026-07-05
NVD
CVE-2026-23040
EUVD
EUVD-2026-5507

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *

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Exploitability

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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability is in the Linux kernel's wifi component, specifically in mac80211_hwsim. It involves a typo in the frequency notification where the NAN (Neighbor Awareness Networking) notification incorrectly uses 5475 MHz instead of the correct 5745 MHz, which corresponds to channel 149.

Because 5475 MHz is not a valid channel, this typo can cause a NULL pointer dereference in the function cfg80211_next_nan_dw_notif.

Impact Analysis

The impact of this vulnerability is that it could cause a NULL pointer dereference in the Linux kernel's wifi subsystem. This type of error can lead to a kernel crash or system instability, potentially causing denial of service on affected systems.

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