Bug 2390408 (CVE-2025-38642)

Summary: CVE-2025-38642 kernel: wifi: mac80211: fix WARN_ON for monitor mode on some devices
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2025-08-22 17:05:18 UTC 
In the Linux kernel, the following vulnerability has been resolved:

wifi: mac80211: fix WARN_ON for monitor mode on some devices

On devices without WANT_MONITOR_VIF (and probably without
channel context support) we get a WARN_ON for changing the
per-link setting of a monitor interface.

Since we already skip AP_VLAN interfaces and MONITOR with
WANT_MONITOR_VIF and/or NO_VIRTUAL_MONITOR should update
the settings, catch this in the link change code instead
of the warning.
Comment 1 Keith Grant 2025-08-22 18:34:41 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025082235-CVE-2025-38642-18af@gregkh/T