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In the Linux kernel, the following vulnerability has been resolved:
s390/dasd: Guard sysfs discipline callbacks against unallocated private data
Several sysfs show/store handlers call a discipline callback that dereferences device->private, either directly or through the DASD_DEFINE_ATTR() macro. During dasd_generic_set_online() the discipline is assigned before check_device() allocates device->private, so an unprivileged read of one of these world-readable attributes in that window dereferences a NULL pointer and panics.
Guard the dereference inside each callback that actually touches device->private.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linuxUpgrade linux-6.12 | Sep 30, 2026 | Sep 11, 2026 |
| Redhat_linux | — | No solution exists | Sep 16, 2026 | Sep 11, 2026 |
| Ubuntu | — | Upgrade linux-oracleUpgrade linux-intel-iot-realtimeUpgrade linux-realtimeUpgrade linux-oem-7.0Upgrade linux-bluefieldUpgrade linux-intel-iotg-5.15Upgrade linux-azure-fdeUpgrade linux-gcp-5.15Upgrade linux-gcp-fipsUpgrade linux-gcpUpgrade linux-ibm-5.15Upgrade linux-riscv-5.15Upgrade linux-lowlatency-hwe-5.15Upgrade linux-fipsUpgrade linux-hwe-7.0Upgrade linux-aws-5.15Upgrade linux-intel-iotgUpgrade linux-kvmUpgrade linux-nvidiaUpgrade linuxUpgrade linux-hwe-5.15Upgrade linux-awsUpgrade linux-riscvUpgrade linux-nvidia-tegra-igxUpgrade linux-aws-fipsUpgrade linux-ibmUpgrade linux-nvidia-tegra-5.15Upgrade linux-oracle-5.15Upgrade linux-azureUpgrade linux-riscv-7.0Upgrade linux-lowlatencyUpgrade linux-azure-5.15Upgrade linux-nvidia-tegraUpgrade linux-gkeopUpgrade linux-gkeUpgrade linux-azure-fipsUpgrade linux-azure-fde-5.15 | Nov 3, 2026 | Sep 11, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Sep 21, 2026 | Sep 11, 2026 |
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