In the Linux kernel, the following vulnerability has been resolved:
media: si470x: Fix use-after-free in si470x_int_in_callback()
syzbot reported use-after-free in si470x_int_in_callback() [1]. This indicates that urb->context, which contains struct si470x_device object, is freed when si470x_int_in_callback() is called.
The cause of this issue is that si470x_int_in_callback() is called for freed urb.
si470x_usb_driver_probe() calls si470x_start_usb(), which then calls usb_submit_urb() and si470x_start(). If si470x_start_usb() fails, si470x_usb_driver_probe() doesn't kill urb, but it just frees struct si470x_device object, as depicted below:
si470x_usb_driver_probe() ... si470x_start_usb() ... usb_submit_urb() retval = si470x_start() return retval if (retval < 0) free struct si470x_device object, but don't kill urb
This patch fixes this issue by killing urb when si470x_start_usb() fails and urb is submitted. If si470x_start_usb() fails and urb is not submitted, i.e. submitting usb fails, it just frees struct si470x_device object.
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Oct 9, 2025 | Oct 9, 2025 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Oct 7, 2025 |
| Ubuntu | — | Upgrade linux-azure-4.15Upgrade linux-nvidiaUpgrade linux-azure-5.4Upgrade linux-raspiUpgrade linux-oracle-5.15Upgrade linux-raspi-5.4Upgrade linux-realtimeUpgrade linux-oracleUpgrade linux-gkeopUpgrade linux-gcp-4.15Upgrade linux-gcp-5.15Upgrade linux-intel-iotg-5.15Upgrade linux-hwe-5.15Upgrade linux-azureUpgrade linux-bluefieldUpgrade linux-ibmUpgrade linux-hwe-5.4Upgrade linux-hweUpgrade linux-xilinx-zynqmpUpgrade linux-kvmUpgrade linux-aws-fipsUpgrade linux-gcp-fipsUpgrade linux-intel-iotgUpgrade linux-lowlatencyUpgrade linux-azure-5.15Upgrade linux-aws-5.4Upgrade linux-iotUpgrade linux-lowlatency-hwe-5.15Upgrade linux-intel-iot-realtimeUpgrade linux-gcp-5.4Upgrade linux-riscv-5.15Upgrade linuxUpgrade linux-fipsUpgrade linux-ibm-5.4Upgrade linux-azure-fipsUpgrade linux-gkeUpgrade linux-aws-5.15Upgrade linux-aws-hweUpgrade linux-nvidia-tegra-5.15Upgrade linux-oracle-5.4Upgrade linux-gcpUpgrade linux-aws | Oct 10, 2025 | Oct 7, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 15, 2025 | Oct 7, 2025 |
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