In the Linux kernel, the following vulnerability has been resolved:
cxl: fix possible null-ptr-deref in cxl_guest_init_afu|adapter()
If device_register() fails in cxl_register_afu|adapter(), the device is not added, device_unregister() can not be called in the error path, otherwise it will cause a null-ptr-deref because of removing not added device.
As comment of device_register() says, it should use put_device() to give up the reference in the error path. So split device_unregister() into device_del() and put_device(), then goes to put dev when register fails.
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Oct 6, 2025 | Oct 6, 2025 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Oct 4, 2025 |
| Ubuntu | — | Upgrade linux-nvidia-tegra-5.15Upgrade linux-gkeUpgrade linux-gcpUpgrade linux-awsUpgrade linux-lowlatency-hwe-5.15Upgrade linux-iotUpgrade linux-aws-5.4Upgrade linux-ibm-5.4Upgrade linux-bluefieldUpgrade linux-oracle-5.4Upgrade linux-aws-5.15Upgrade linux-azure-4.15Upgrade linux-realtimeUpgrade linux-raspi-5.4Upgrade linux-raspiUpgrade linuxUpgrade linux-azure-5.4Upgrade linux-kvmUpgrade linux-azureUpgrade linux-oracle-5.15Upgrade linux-ibmUpgrade linux-lowlatencyUpgrade linux-aws-hweUpgrade linux-gcp-fipsUpgrade linux-azure-fipsUpgrade linux-fipsUpgrade linux-hwe-5.15Upgrade linux-intel-iotgUpgrade linux-nvidiaUpgrade linux-hweUpgrade linux-aws-fipsUpgrade linux-gcp-5.4Upgrade linux-hwe-5.4Upgrade linux-intel-iot-realtimeUpgrade linux-gcp-5.15Upgrade linux-gcp-4.15Upgrade linux-intel-iotg-5.15Upgrade linux-riscv-5.15Upgrade linux-gkeopUpgrade linux-oracleUpgrade linux-xilinx-zynqmpUpgrade linux-azure-5.15 | Oct 10, 2025 | Oct 4, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 15, 2025 | Oct 4, 2025 |
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