In the Linux kernel, the following vulnerability has been resolved:
wifi: ath9k: avoid referencing uninit memory in ath9k_wmi_ctrl_rx
For the reasons also described in commit b383e8abed41 ("wifi: ath9k: avoid uninit memory read in ath9k_htc_rx_msg()"), ath9k_htc_rx_msg() should validate pkt_len before accessing the SKB.
For example, the obtained SKB may have been badly constructed with pkt_len = 8. In this case, the SKB can only contain a valid htc_frame_hdr but after being processed in ath9k_htc_rx_msg() and passed to ath9k_wmi_ctrl_rx() endpoint RX handler, it is expected to have a WMI command header which should be located inside its data payload.
Implement sanity checking inside ath9k_wmi_ctrl_rx(). Otherwise, uninit memory can be referenced.
Tested on Qualcomm Atheros Communications AR9271 802.11n .
Found by Linux Verification Center (linuxtesting.org) with Syzkaller.
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Dec 31, 2025 | Dec 31, 2025 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Dec 30, 2025 |
| Ubuntu | — | Upgrade linux-xilinx-zynqmpUpgrade linux-fipsUpgrade linux-nvidiaUpgrade linux-gcp-5.15Upgrade linux-oracle-5.4Upgrade linux-nvidia-tegraUpgrade linux-ibmUpgrade linux-azure-5.15Upgrade linux-intel-iot-realtimeUpgrade linux-aws-fipsUpgrade linux-aws-5.15Upgrade linux-oracleUpgrade linux-ibm-5.15Upgrade linux-gkeUpgrade linux-bluefieldUpgrade linux-riscv-5.15Upgrade linux-nvidia-tegra-igxUpgrade linux-raspi-5.4Upgrade linux-kvmUpgrade linux-oracle-5.15Upgrade linux-intel-iotgUpgrade linux-gcp-5.4Upgrade linux-realtimeUpgrade linux-gcpUpgrade linux-gkeopUpgrade linux-lowlatency-hwe-5.15Upgrade linux-awsUpgrade linux-gcp-fipsUpgrade linux-aws-5.4Upgrade linuxUpgrade linux-hwe-5.15Upgrade linux-hwe-5.4Upgrade linux-ibm-5.4Upgrade linux-azure-5.4Upgrade linux-iotUpgrade linux-azureUpgrade linux-nvidia-tegra-5.15Upgrade linux-lowlatencyUpgrade linux-raspiUpgrade linux-intel-iotg-5.15Upgrade linux-azure-fips | Jan 6, 2026 | Jan 2, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Dec 30, 2025 |
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