CVE-2025-38290

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

wifi: ath12k: fix node corruption in ar->arvifs list

In current WLAN recovery code flow, ath12k_core_halt() only reinitializes the "arvifs" list head. This will cause the list node immediately following the list head to become an invalid list node. Because the prev of that node still points to the list head "arvifs", but the next of the list head "arvifs" no longer points to that list node.

When a WLAN recovery occurs during the execution of a vif removal, and it happens before the spin_lock_bh(&ar->data_lock) in ath12k_mac_vdev_delete(), list_del() will detect the previously mentioned situation, thereby triggering a kernel panic.

The fix is to remove and reinitialize all vif list nodes from the list head "arvifs" during WLAN halt. The reinitialization is to make the list nodes valid, ensuring that the list_del() in ath12k_mac_vdev_delete() can execute normally.

Call trace: __list_del_entry_valid_or_report+0xd4/0x100 (P) ath12k_mac_remove_link_interface.isra.0+0xf8/0x2e4 [ath12k] ath12k_scan_vdev_clean_work+0x40/0x164 [ath12k] cfg80211_wiphy_work+0xfc/0x100 process_one_work+0x164/0x2d0 worker_thread+0x254/0x380 kthread+0xfc/0x100 ret_from_fork+0x10/0x20

The change is mostly copied from the ath11k patch: https://lore.kernel.org/all/[email protected]/

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.4.1-00199-QCAHKSWPL_SILICONZ-1

A race condition in the Qualcomm ath12k wireless driver could lead to a kernel panic when WLAN recovery occurs during interface (vif) deletion. The root cause is improper reinitialization of the ar->arvifs linked list - specifically, only the list head was reset while stale nodes remained, creating an invalid list state. This results in a corrupted list during list_del(), triggering __list_del_entry_valid_or_report(). The issue is fixed by safely deleting and reinitializing all list nodes under a lock in ath12k_core_halt().

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.