wifi: mac80211: remove station if connection prep fails

Summary

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.

Timeline

1. May 28, 2026, 9:35 AM UTCCVE published
2. Oct 16, 2026, 3:20 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: total

3. Oct 19, 2026, 7:36 PM UTCRecord last updated

Affected versions

• Linux Linux

  From 81151ce462e533551f3284bfdb8e0f461c9220e6 · fixed in 18fed0a209500bfea5c4c08609ec93855e4e500b; From 81151ce462e533551f3284bfdb8e0f461c9220e6 · fixed in fe75fa1ac9a92990f7fc3d34b17808fd933071b2; From 81151ce462e533551f3284bfdb8e0f461c9220e6 · fixed in afcbaed89cdc1a001b43270cbf5394bb4804270a; From 81151ce462e533551f3284bfdb8e0f461c9220e6 · fixed in 9e28654f79f443bca9b29ff3ae7cf18abfba58a0; From 81151ce462e533551f3284bfdb8e0f461c9220e6 · fixed in 1c2b72ea89882aeb948340498391e69c58d466f1; From 81151ce462e533551f3284bfdb8e0f461c9220e6 · fixed in 283fc9e44ff5b5ac967439b4951b80bd4299f4e4

• Linux Linux

  6.0

• KernelLinux

  From 6.0.0 · fixed in 6.1.176; From 6.2.0 · fixed in 6.6.140; From 6.7.0 · fixed in 6.12.88; From 6.13.0 · fixed in 6.18.30; From 6.19.0 · fixed in 7.0.7

References 6