In the Linux kernel, the following vulnerability has been resolved:
powerpc/rtas: avoid device tree lookups in rtas_os_term()
rtas_os_term() is called during panic. Its behavior depends on a couple of conditions in the /rtas node of the device tree, the traversal of which entails locking and local IRQ state changes. If the kernel panics while devtree_lock is held, rtas_os_term() as currently written could hang.
Instead of discovering the relevant characteristics at panic time, cache them in file-static variables at boot. Note the lookup for "ibm,extended-os-term" is converted to of_property_read_bool() since it is a boolean property, not an RTAS function token.
[mpe: Incorporate suggested change from Nick]
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Dec 31, 2025 | Dec 31, 2025 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Dec 30, 2025 |
| Ubuntu | — | Upgrade linux-raspi-5.4Upgrade linux-ibm-5.4Upgrade linux-nvidia-tegra-5.15Upgrade linux-gcp-5.4Upgrade linux-riscv-5.15Upgrade linux-ibmUpgrade linux-xilinx-zynqmpUpgrade linux-nvidiaUpgrade linux-gcp-fipsUpgrade linux-aws-fipsUpgrade linux-gkeopUpgrade linux-azure-5.15Upgrade linux-hwe-5.4Upgrade linuxUpgrade linux-intel-iot-realtimeUpgrade linux-oracle-5.4Upgrade linux-bluefieldUpgrade linux-azure-fipsUpgrade linux-gcpUpgrade linux-fipsUpgrade linux-intel-iotgUpgrade linux-gkeUpgrade linux-hweUpgrade linux-aws-5.4Upgrade linux-kvmUpgrade linux-lowlatencyUpgrade linux-intel-iotg-5.15Upgrade linux-awsUpgrade linux-oracleUpgrade linux-raspiUpgrade linux-azure-4.15Upgrade linux-realtimeUpgrade linux-iotUpgrade linux-gcp-4.15Upgrade linux-aws-hweUpgrade linux-aws-5.15Upgrade linux-azure-fdeUpgrade linux-oracle-5.15Upgrade linux-azureUpgrade linux-lowlatency-hwe-5.15Upgrade linux-gcp-5.15Upgrade linux-hwe-5.15Upgrade linux-azure-5.4Upgrade linux-azure-fde-5.15 | 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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