UBUNTU-CVE-2026-97474: High severity ubuntu/linux vulnerability

In the Linux kernel, the following vulnerability has been resolved: wifi: iwlwifi: mld: purge async notifications upon nic error This fixes a kernel panic in reconfig failure: 1. we have a BSS connection 2. we have a NAN connection 3. FW error occurs 4. reconfig restores the BSS connection 5. however, restoring the NAN connection fails due to a FW error. 6. erroneously, ieee80211handlereconfigfailure is called and marks all interfaces as not-in-driver (will be fixed in a different patch). 7. mac80211 frees the links of the BSS connection but doesn't tell the driver about that, as it thinks that this vif is not in the driver. 8. in ieee80211stopdevice, ALL wiphy works are getting flushed (erroneously?) 9. Therefore, asynchandlerswk is being executed, processing the statistics notification that was received after we restored the BSS connection. 10. the notification handler dereferences fwidtobssconf[id], which is now a dangling pointer, as mac80211 already freed this link in (7). 11. On the first access to one of the links fields, we panic. While this can and should be fixed by removing the call to ieee80211handlereconfigfailure in (6), it is also not a good idea to carry and maybe handle notifications from a dead FW. We do purge the notifications when we stop the FW, but in reconfig failure we stop the FW too late, after the notifications are processed. In addition, asynchandlerswk can always be scheduled before the reconfig work. Purge the notifications immediately when transport notifies about a nic error.