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In the Linux kernel, the following vulnerability has been resolved:
wifi: ath9k: hif_usb: Fix use-after-free in ath9k_hif_usb_reg_in_cb()
It is possible that skb is freed in ath9k_htc_rx_msg(), then usb_submit_urb() fails and we try to free skb again. It causes use-after-free bug. Moreover, if alloc_skb() fails, urb->context becomes NULL but rx_buf is not freed and there can be a memory leak.
The patch removes unnecessary nskb and makes skb processing more clear: it is supposed that ath9k_htc_rx_msg() either frees old skb or passes its managing to another callback function.
Found by Linux Verification Center (linuxtesting.org) with Syzkaller.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Dec 31, 2025 | Dec 31, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernel-abi-stablelistsUpgrade kernel-tools-libsUpgrade bpftoolUpgrade kernelUpgrade kernel-toolsUpgrade python3-perf | Mar 10, 2026 | Mar 10, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Dec 30, 2025 |
| Ubuntu | — | Upgrade linux-gcp-5.4Upgrade linux-nvidiaUpgrade linux-intel-iotg-5.15Upgrade linux-hweUpgrade linux-iotUpgrade linux-azureUpgrade linux-hwe-5.4Upgrade linux-raspi-5.4Upgrade linux-intel-iot-realtimeUpgrade linux-kvmUpgrade linux-oracleUpgrade linux-gcp-fipsUpgrade linux-aws-fipsUpgrade linux-gcpUpgrade linux-azure-5.15Upgrade linux-gkeopUpgrade linux-ibmUpgrade linux-gcp-5.15Upgrade linux-azure-5.4Upgrade linux-azure-4.15Upgrade linux-gcp-4.15Upgrade linux-awsUpgrade linux-azure-fipsUpgrade linux-hwe-5.15Upgrade linux-aws-5.4Upgrade linux-bluefieldUpgrade linux-lowlatency-hwe-5.15Upgrade linux-oracle-5.4Upgrade linux-xilinx-zynqmpUpgrade linux-fipsUpgrade linux-aws-hweUpgrade linux-intel-iotgUpgrade linux-ibm-5.4Upgrade linux-oracle-5.15Upgrade linux-gkeUpgrade linux-nvidia-tegra-5.15Upgrade linux-riscv-5.15Upgrade linux-realtimeUpgrade linuxUpgrade linux-lowlatencyUpgrade linux-raspiUpgrade linux-aws-5.15Upgrade linux-azure-fde | 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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