CVE-2025-37943: wifi: ath12k: Fix invalid data access in ath12k_dp_rx_h_undecap_nwifi

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-05-20 · updated 2026-07-30
Weakness: CWE-787

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: ath12k: Fix invalid data access in ath12k_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 ath12k_dp_rx_h_undecap_nwifi function for DP_RX_DECAP_TYPE_NATIVE_WIFI decap type and potentially resulting in invalid data access and memory corruption. 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. Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.3.1-00173-QCAHKSWPL_SILICONZ-1

Affected products

Linux kernel: from 6.3 before 6.6.88; from 6.7 before 6.12.24; from 6.13 before 6.13.12; from 6.14 before 6.14.3 — fixed in 6.12.24, 6.13.12, 6.14.3, 6.6.88

How to fix

Upgrade to a fixed version: Linux kernel 6.12.24, 6.13.12, 6.14.3, 6.6.88. Check the vendor advisory for mitigations.

References

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