wifi: ath11k: fix invalid data access in ath11k_dp_rx_h_undecap_nwifi

Summary

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

Timeline

1. Sep 24, 2026, 4:03 PM UTCCVE published
2. Oct 3, 2026, 10:58 AM UTCRecord last updated

Affected versions

• Linux Linux

  From acc79d981c1462b22a7a2cb0d39725f8c01fc425 · fixed in 958cf3696ddc5ccafd3d0b8b0c03d90bcd771c0c; From acc79d981c1462b22a7a2cb0d39725f8c01fc425 · fixed in b4ef30f1d107aae460edf731a7c2d187fbc46a32; From acc79d981c1462b22a7a2cb0d39725f8c01fc425 · fixed in 1c0a13be76db3c1cf774aa11d9f4c3f8239ac567; From acc79d981c1462b22a7a2cb0d39725f8c01fc425 · fixed in 00738665c875ab34efa7126ea63c9d70b48ee169; From acc79d981c1462b22a7a2cb0d39725f8c01fc425 · fixed in 6b471e9aefee9ed73278eb1141e0d8530a56fae9

• Linux Linux

  5.7

• KernelLinux

  From 5.7.0 · fixed in 6.1.189; From 6.2.0 · fixed in 6.6.158; From 6.7.0 · fixed in 6.12.111; From 6.13.0 · fixed in 6.18.53

References 5