In the Linux kernel, the following vulnerability has been resolved:
KVM: s390: pv: fix index value of replaced ASCE
The index field of the struct page corresponding to a guest ASCE should be 0. When replacing the ASCE in s390_replace_asce(), the index of the new ASCE should also be set to 0.
Having the wrong index might lead to the wrong addresses being passed around when notifying pte invalidations, and eventually to validity intercepts (VM crash) if the prefix gets unmapped and the notifier gets called with the wrong address.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Dec 29, 2025 | Dec 29, 2025 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Dec 24, 2025 |
| Ubuntu | — | Upgrade linux-nvidia-tegra-igxUpgrade linux-gkeUpgrade linux-awsUpgrade linux-aws-5.15Upgrade linux-nvidia-tegra-5.15Upgrade linux-ibm-5.15Upgrade linux-nvidia-tegraUpgrade linux-gcpUpgrade linuxUpgrade linux-intel-iot-realtimeUpgrade linux-riscv-5.15Upgrade linux-intel-iotgUpgrade linux-azureUpgrade linux-lowlatencyUpgrade linux-realtimeUpgrade linux-ibmUpgrade linux-hwe-5.15Upgrade linux-bluefieldUpgrade linux-nvidiaUpgrade linux-gkeopUpgrade linux-raspiUpgrade linux-lowlatency-hwe-5.15Upgrade linux-azure-fdeUpgrade linux-oracle-5.15Upgrade linux-intel-iotg-5.15Upgrade linux-xilinx-zynqmpUpgrade linux-gcp-5.15Upgrade linux-oracleUpgrade linux-kvmUpgrade linux-azure-5.15 | Jan 6, 2026 | Dec 24, 2025 |
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