CVE-2026-97474

wifi: iwlwifi: mld: purge async notifications upon nic error

HIGH
7.4
CVSS Score
Published: September 24, 2026 at 04:04 PM UTC
Updated: September 28, 2026 at 06:16 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH7.4
Exploit prediction
EPSS 0.1%

Description

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, ieee80211_handle_reconfig_failure 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 ieee80211_stop_device, *ALL* wiphy works are getting flushed (erroneously?) 9. Therefore, async_handlers_wk is being executed, processing the statistics notification that was received after we restored the BSS connection. 10. the notification handler dereferences fw_id_to_bss_conf[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 ieee80211_handle_reconfig_failure 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, async_handlers_wk can always be scheduled before the reconfig work. Purge the notifications immediately when transport notifies about a nic error.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

6.15 ≤ v < 6.18.536.15 ≤ v < 7.26.15d1e879ec600f9b3bdd253167533959facfefb17b
Vendor states this is fixed in 1b3b7b521041d55459f8457db8921e9778482063 (fixed)
Vendor states this is fixed in a40ad60a47f7c904b75a9ff83b39edebf3961c85 (fixed)
Vendor states this is fixed in 6.15 (unaffected)
Vendor states this is fixed in 6.18.53 (unaffected)
Vendor states this is fixed in 7.2 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

CVSS

7.4HIGHLinux
Vector?

Quick Info

StatusRECEIVED

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