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

wifi: ath11k: fix invalid data access in ath11k dp rx h undecap nwifi

In certain cases, hardware might provide packets with a length greater than the maximum native Wi-Fi header length. This can lead to accessing and modifying fields in the header within the ath11k dp rx h undecap nwifi() function for the DP RX DECAP TYPE NATIVE WIFI decap type and potentially result in invalid data access and memory corruption.

Kernel stack is corrupted in: ath11k dp rx h undecap+0x6b0/0x6b0 [ath11k] Call trace: ath11k dp rx h mpdu+0x0/0x2e8 [ath11k] ath11k dp rx h mpdu+0x1e0/0x2e8 [ath11k] ath11k dp rx wbm err+0x1e0/0x450 [ath11k] ath11k dp rx process wbm err+0x2fc/0x460 [ath11k] ath11k dp service srng+0x2e0/0x348 [ath11k]

Add a sanity check before processing the SKB to prevent invalid data access in the undecap native Wi-Fi function for the DP RX DECAP TYPE NATIVE WIFI decap type.

This adapted from the discussion/patch of the ath12k driver [1].

Tested-on: WCN6855 hw2.1 PCI WLAN.HSP.1.1-04685-QCAHSPSWPL V1 V2 SILICONZ IOE-1