CVE-2026-90343

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

wifi: cfg80211: stop PMSR before P2P and NAN teardown

PMSR request teardown must abort active measurements while the

wireless_dev is still present in the driver. cfg80211_leave_locked() and

cfg80211_stop_pd() already do this before invoking the driver's stop

callback, but cfg80211_stop_p2p_device() and cfg80211_stop_nan() do not.

Those helpers are also called directly by nl80211, rfkill shutdown, and

wireless_dev unregister paths. If one of these paths stops a P2P device

or NAN interface with a pending request, it removes the mac80211

subinterface from the driver first. Subsequent request cleanup cannot

reach the lower driver's abort callback, but cfg80211 frees the request

regardless. Driver state can then retain a stale request and use it when

it later reports a result.

Call cfg80211_pmsr_wdev_down() before stopping the P2P device or NAN

interface. This keeps lower-driver request state and cfg80211 request

owners

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References