In the Linux kernel, the following vulnerability has been resolved:
wifi: ath9k: hif_usb: fix memory leak of urbs in ath9k_hif_usb_dealloc_tx_urbs()
Syzkaller reports a long-known leak of urbs in ath9k_hif_usb_dealloc_tx_urbs().
The cause of the leak is that usb_get_urb() is called but usb_free_urb() (or usb_put_urb()) is not called inside usb_kill_urb() as urb->dev or urb->ep fields have not been initialized and usb_kill_urb() returns immediately.
The patch removes trying to kill urbs located in hif_dev->tx.tx_buf because hif_dev->tx.tx_buf is not supposed to contain urbs which are in pending state (the pending urbs are stored in hif_dev->tx.tx_pending). The tx.tx_lock is acquired so there should not be any changes in the list.
Found by Linux Verification Center (linuxtesting.org) with Syzkaller.
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Dec 29, 2025 | Dec 29, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernel-abi-stablelistsUpgrade kernel-toolsUpgrade kernel-tools-libsUpgrade python3-perfUpgrade kernelUpgrade bpftool | Mar 10, 2026 | Mar 10, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Dec 24, 2025 |
| Ubuntu | — | Upgrade linux-nvidia-tegra-5.15Upgrade linux-aws-5.15Upgrade linux-raspiUpgrade linux-azure-5.15Upgrade linux-lowlatency-hwe-5.15Upgrade linux-aws-5.4Upgrade linux-gkeUpgrade linux-fipsUpgrade linux-nvidiaUpgrade linux-ibm-5.4Upgrade linux-intel-iotgUpgrade linux-gkeopUpgrade linux-oracle-5.4Upgrade linux-xilinx-zynqmpUpgrade linux-aws-hweUpgrade linux-oracleUpgrade linux-lowlatencyUpgrade linux-azure-fipsUpgrade linux-kvmUpgrade linux-oracle-5.15Upgrade linux-riscv-5.15Upgrade linux-realtimeUpgrade linux-gcp-fipsUpgrade linux-azure-5.4Upgrade linux-awsUpgrade linux-intel-iot-realtimeUpgrade linux-hweUpgrade linux-hwe-5.15Upgrade linux-iotUpgrade linuxUpgrade linux-ibmUpgrade linux-raspi-5.4Upgrade linux-azure-4.15Upgrade linux-bluefieldUpgrade linux-gcp-4.15Upgrade linux-intel-iotg-5.15Upgrade linux-azureUpgrade linux-gcp-5.4Upgrade linux-gcp-5.15Upgrade linux-hwe-5.4Upgrade linux-aws-fipsUpgrade linux-gcp | Jan 6, 2026 | Dec 24, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Dec 24, 2025 |
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