CVE-2025-37943 wifi: ath12k: Fix invalid data access in ath12k_dp_rx_h_undecap_nwifi
A memory corruption vulnerability in the Linux kernel ath12k Wi-Fi driver allows attackers to cause invalid data access, potentially leading to code execution or system crashes.
- 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-2025-37943?
CVE-2025-37943 is a high-severity memory corruption vulnerability in Linux kernel, published on 20 May 2025. 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: 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
Weakness: CWE-787
Which versions are affected by CVE-2025-37943?
It affects 1 product.
Linux distribution packages (3)
kpatch-patch-5_14_0-570_17_1 Red Hat:enterprise_linux:9::baseos | All versions | 0:1-1.el9_6 |
kpatch-patch-5_14_0-570_17_1-debuginfo Red Hat:enterprise_linux:9::baseos | All versions | 0:1-1.el9_6 |
kpatch-patch-5_14_0-570_17_1-debugsource Red Hat:enterprise_linux:9::baseos | All versions | 0:1-1.el9_6 |
Products include Linux kernel.
How do I fix CVE-2025-37943?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-37943 being exploited?
There is no known exploitation of CVE-2025-37943 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2025-37943, DEBIAN-CVE-2025-37943, GHSA-38h5-7v7x-v6pw, RHSA-2025:9068, ROOT-OS-UBUNTU-2204-CVE-2025-37943, ROOT-OS-UBUNTU-2404-CVE-2025-37943 and 1 more.