CVE-2026-74412 wifi: rtw88: fix wrong pci_get_drvdata type in AER handlers
A type confusion bug in the rtw88 Wi-Fi driver causes memory corruption during PCI error handling, potentially leading to a system crash.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-74412?
CVE-2026-74412 is a high-severity vulnerability in Linux, published on 15 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
wifi: rtw88: fix wrong pci_get_drvdata type in AER handlers
rtw88 stores an ieee80211_hw pointer via pci_set_drvdata() at probe time, but io_error_detected() and io_resume() retrieve it as a net_device pointer. This causes netif_device_detach/attach to operate on an ieee80211_hw struct, reading and writing at wrong offsets.
Use ieee80211_stop_queues/wake_queues instead, consistent with every other queue stop/start path in the driver.
Which versions are affected by CVE-2026-74412?
How do I fix CVE-2026-74412?
Apply the vendor's patch.
Is CVE-2026-74412 being exploited?
There is no known exploitation of CVE-2026-74412 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-74412, DEBIAN-CVE-2026-74412, GHSA-r36v-qwfg-3x64, UBUNTU-CVE-2026-74412.