CVE-2026-23040
Null Pointer Dereference in Linux mac80211_hwsim Frequency Notification
Publication date: 2026-02-04
Last updated on: 2026-02-04
Assigner: kernel.org
Description
Description
CVSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| linux | linux_kernel | * |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
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.
How can this vulnerability impact me? :
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.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know