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In the Linux kernel, the following vulnerability has been resolved:
riscv: prevent pt_regs corruption for secondary idle threads
Top of the kernel thread stack should be reserved for pt_regs. However this is not the case for the idle threads of the secondary boot harts. Their stacks overlap with their pt_regs, so both may get corrupted.
Similar issue has been fixed for the primary hart, see c7cdd96eca28 ("riscv: prevent stack corruption by reserving task_pt_regs(p) early"). However that fix was not propagated to the secondary harts. The problem has been noticed in some CPU hotplug tests with V enabled. The function smp_callin stored several registers on stack, corrupting top of pt_regs structure including status field. As a result, kernel attempted to save or restore inexistent V context.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jul 30, 2024 | Jun 24, 2024 |
| Ubuntu | — | Upgrade linux-image-5.15.0-1073-awsUpgrade linux-image-6.8.0-1013-nvidia-lowlatencyUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-6.8.0-1015-awsUpgrade linux-image-azure-cvmUpgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-nvidia-64k-6.8Upgrade linux-image-gkeop-5.15Upgrade linux-image-5.15.0-127-generic-lpaeUpgrade linux-image-5.15.0-1068-nvidiaUpgrade linux-image-gcp-lts-22.04Upgrade linux-image-6.8.0-1014-gcpUpgrade linux-image-oem-22.04Upgrade linux-image-nvidia-lowlatencyUpgrade linux-image-6.8.0-1012-oracle-64kUpgrade linux-image-lowlatency-64kUpgrade linux-image-lowlatencyUpgrade linux-image-lowlatency-64k-hwe-20.04Upgrade linux-image-gke-5.15Upgrade linux-image-awsUpgrade linux-image-6.8.0-1010-gkeUpgrade linux-image-raspiUpgrade linux-image-azure-fdeUpgrade linux-image-raspi-nolpaeUpgrade linux-image-nvidia-6.8Upgrade linux-image-5.15.0-1070-gkeUpgrade linux-image-5.15.0-1066-ibmUpgrade linux-image-ibmUpgrade linux-image-5.15.0-1071-oracleUpgrade linux-image-6.8.0-45-genericUpgrade linux-image-6.8.0-44-lowlatencyUpgrade linux-image-oem-22.04aUpgrade linux-image-5.15.0-1072-gcpUpgrade linux-image-generic-lpaeUpgrade linux-image-5.15.0-1078-azureUpgrade linux-image-5.15.0-1039-xilinx-zynqmpUpgrade linux-image-5.15.0-127-lowlatencyUpgrade linux-image-oracleUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-5.15.0-1071-intel-iotgUpgrade linux-image-6.8.0-1012-ibmUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-6.8.0-1012-oracleUpgrade linux-image-6.8.0-44-generic-64kUpgrade linux-image-generic-hwe-20.04Upgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-nvidiaUpgrade linux-image-generic-64kUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-6.8.0-1013-nvidiaUpgrade linux-image-gkeUpgrade linux-image-oracle-64kUpgrade linux-image-6.8.0-1011-raspiUpgrade linux-image-oem-22.04bUpgrade linux-image-oem-22.04dUpgrade linux-image-5.15.0-1056-gkeopUpgrade linux-image-6.8.0-1013-nvidia-lowlatency-64kUpgrade linux-image-lowlatency-hwe-20.04Upgrade linux-image-oem-20.04bUpgrade linux-image-intel-iotgUpgrade linux-image-oem-20.04Upgrade linux-image-oem-22.04cUpgrade linux-image-aws-lts-22.04Upgrade linux-image-gkeopUpgrade linux-image-virtualUpgrade linux-image-nvidia-64kUpgrade linux-image-5.15.0-127-lowlatency-64kUpgrade linux-image-oem-20.04dUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-ibm-lts-24.04Upgrade linux-image-6.8.0-44-genericUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-oracle-lts-22.04Upgrade linux-image-generic-64k-hwe-20.04Upgrade linux-image-kvmUpgrade linux-image-6.8.0-1013-nvidia-64kUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-6.8.0-1014-azure-fdeUpgrade linux-image-ibm-classicUpgrade linux-image-6.8.0-1012-oemUpgrade linux-image-generic-lpae-hwe-20.04Upgrade linux-image-5.15.0-1066-raspiUpgrade linux-image-genericUpgrade linux-image-5.15.0-1070-kvmUpgrade linux-image-5.15.0-127-generic-64kUpgrade linux-image-azureUpgrade linux-image-gcpUpgrade linux-image-oem-20.04cUpgrade linux-image-azure-lts-22.04Upgrade linux-image-intelUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-6.8.0-1014-azureUpgrade linux-image-5.15.0-1068-nvidia-lowlatencyUpgrade linux-image-5.15.0-127-genericUpgrade linux-image-6.8.0-44-lowlatency-64kUpgrade linux-image-6.8.0-45-generic-64kUpgrade linux-image-virtual-hwe-20.04 | Sep 12, 2024 | Jun 24, 2024 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 14, 2025 | Jun 24, 2024 |
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