In the Linux kernel, the following vulnerability has been resolved:
KVM: x86: Play nice with protected guests in complete_hypercall_exit()
Use is_64_bit_hypercall() instead of is_64_bit_mode() to detect a 64-bit hypercall when completing said hypercall. For guests with protected state, e.g. SEV-ES and SEV-SNP, KVM must assume the hypercall was made in 64-bit mode as the vCPU state needed to detect 64-bit mode is unavailable.
Hacking the sev_smoke_test selftest to generate a KVM_HC_MAP_GPA_RANGE hypercall via VMGEXIT trips the WARN:
------------[ cut here ]------------ WARNING: CPU: 273 PID: 326626 at arch/x86/kvm/x86.h:180 complete_hypercall_exit+0x44/0xe0 [kvm] Modules linked in: kvm_amd kvm ... [last unloaded: kvm] CPU: 273 UID: 0 PID: 326626 Comm: sev_smoke_test Not tainted 6.12.0-smp--392e932fa0f3-feat #470 Hardware name: Google Astoria/astoria, BIOS 0.20240617.0-0 06/17/2024 RIP: 0010:complete_hypercall_exit+0x44/0xe0 [kvm] Call Trace: <TASK> kvm_arch_vcpu_ioctl_run+0x2400/0x2720 [kvm] kvm_vcpu_ioctl+0x54f/0x630 [kvm] __se_sys_ioctl+0x6b/0xc0 do_syscall_64+0x83/0x160 entry_SYSCALL_64_after_hwframe+0x76/0x7e </TASK> ---[ end trace 0000000000000000 ]---
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 |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernelUpgrade kernel-develUpgrade kernel-tools-debuginfoUpgrade kernel-debuginfoUpgrade perfUpgrade bpftoolUpgrade perf-debuginfoUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-livepatch-5.15.176-118.170Upgrade kernel-tools-develUpgrade kernel-debuginfo-common-x86_64Upgrade python-perf-debuginfoUpgrade bpftool-debuginfoUpgrade kernel-toolsUpgrade kernel-headersUpgrade python-perf | Mar 14, 2025 | Jan 11, 2025 |
| Amazon_linux_2023 | — | Upgrade kernel-debuginfo-common-x86_64Upgrade kernel-modules-extra-commonUpgrade python3-perfUpgrade kernel-libbpf-develUpgrade kernel-livepatch-6.1.124-134.200Upgrade bpftoolUpgrade kernel-tools-develUpgrade kernel-libbpf-staticUpgrade kernel-toolsUpgrade kernelUpgrade kernel-modules-extraUpgrade kernel-debuginfo-common-aarch64Upgrade perfUpgrade kernel-develUpgrade kernel-debuginfoUpgrade bpftool-debuginfoUpgrade kernel-headersUpgrade python3-perf-debuginfoUpgrade kernel-libbpfUpgrade perf-debuginfoUpgrade kernel-tools-debuginfo | Mar 27, 2025 | Jan 11, 2025 |
| Debian | — | Upgrade linux-6.1Upgrade linux | Jan 13, 2025 | Jan 11, 2025 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Jan 11, 2025 |
| Ubuntu | — | Upgrade linux-image-xilinx-zynqmpUpgrade linux-image-6.8.0-1029-awsUpgrade linux-image-6.11.0-1011-gcpUpgrade linux-image-5.15.0-1076-kvmUpgrade linux-image-oracle-lts-24.04Upgrade linux-image-gke-5.15Upgrade linux-image-nvidia-tegra-igxUpgrade linux-image-6.8.0-1028-oemUpgrade linux-image-genericUpgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-gcp-fipsUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-5.15.0-1074-ibmUpgrade linux-image-6.11.0-1011-lowlatencyUpgrade linux-image-6.8.0-1025-gkeUpgrade linux-image-5.15.0-136-genericUpgrade linux-image-6.11.0-1011-lowlatency-64kUpgrade linux-image-6.8.0-1030-gcp-64kUpgrade linux-image-6.8.0-60-generic-64kUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-5.15.0-135-generic-lpaeUpgrade linux-image-azure-lts-22.04Upgrade linux-image-6.8.0-1026-ibmUpgrade linux-image-5.15.0-135-lowlatencyUpgrade linux-image-6.11.0-1012-azure-fdeUpgrade linux-image-aws-fipsUpgrade linux-image-generic-64k-hwe-20.04Upgrade linux-image-nvidia-lowlatencyUpgrade linux-image-lowlatencyUpgrade linux-image-5.15.0-1075-intel-iotgUpgrade linux-image-6.11.0-1011-awsUpgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-5.15.0-1084-azureUpgrade linux-image-generic-lpaeUpgrade linux-image-5.15.0-1083-azure-fipsUpgrade linux-image-lowlatency-hwe-24.04Upgrade linux-image-5.15.0-1062-gkeopUpgrade linux-image-gkeopUpgrade linux-image-oem-24.04bUpgrade linux-image-5.15.0-1079-gcp-fipsUpgrade linux-image-azure-fdeUpgrade linux-image-6.8.0-1028-nvidia-lowlatency-64kUpgrade linux-image-ibmUpgrade linux-image-6.8.0-1029-azure-fdeUpgrade linux-image-lowlatency-64kUpgrade linux-image-oem-20.04bUpgrade linux-image-raspi-nolpaeUpgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-lowlatency-64k-hwe-20.04Upgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-6.11.0-21-genericUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-6.11.0-1011-gcp-64kUpgrade linux-image-oracle-lts-22.04Upgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-5.15.0-1074-nvidiaUpgrade linux-image-6.8.0-1026-oracle-64kUpgrade linux-image-oem-22.04aUpgrade linux-image-5.15.0-135-fipsUpgrade linux-image-5.15.0-135-generic-64kUpgrade linux-image-6.11.0-1017-oemUpgrade linux-image-oem-22.04Upgrade linux-image-nvidia-tegra-rtUpgrade linux-image-azure-fde-lts-24.04Upgrade linux-image-fipsUpgrade linux-image-6.8.0-2023-raspi-realtimeUpgrade linux-image-6.8.0-1028-nvidiaUpgrade linux-image-nvidiaUpgrade linux-image-5.15.0-136-generic-64kUpgrade linux-image-5.15.0-1077-oracleUpgrade linux-image-gcp-lts-22.04Upgrade linux-image-oracleUpgrade linux-image-6.8.0-1028-raspiUpgrade linux-image-nvidia-6.8Upgrade linux-image-gkeop-6.8Upgrade linux-image-aws-lts-22.04Upgrade linux-image-5.15.0-1079-gcpUpgrade linux-image-6.8.0-1028-nvidia-lowlatencyUpgrade linux-image-5.15.0-1080-realtimeUpgrade linux-image-5.15.0-136-generic-lpaeUpgrade linux-image-5.15.0-1077-gkeUpgrade linux-image-5.15.0-1033-nvidia-tegraUpgrade linux-image-nvidia-tegra-igx-rtUpgrade linux-image-6.8.0-1026-oracleUpgrade linux-image-raspiUpgrade linux-image-virtualUpgrade linux-image-5.15.0-1074-raspiUpgrade linux-image-5.15.0-1072-ibmUpgrade linux-image-generic-64kUpgrade linux-image-lowlatency-64k-hwe-24.04Upgrade linux-image-5.15.0-1080-awsUpgrade linux-image-nvidia-64kUpgrade linux-image-aws-lts-24.04Upgrade linux-image-azure-nvidiaUpgrade linux-image-6.8.0-60-genericUpgrade linux-image-6.11.0-1007-realtimeUpgrade linux-image-5.15.0-1086-azureUpgrade linux-image-5.15.0-1081-gcpUpgrade linux-image-5.15.0-1021-nvidia-tegra-igx-rtUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-oem-20.04Upgrade linux-image-generic-lpae-hwe-20.04Upgrade linux-image-realtimeUpgrade linux-image-realtime-hwe-24.04Upgrade linux-image-6.11.0-1012-azureUpgrade linux-image-oem-22.04cUpgrade linux-image-6.8.0-1028-nvidia-64kUpgrade linux-image-5.15.0-1044-xilinx-zynqmpUpgrade linux-image-virtual-hwe-20.04Upgrade linux-image-5.15.0-1086-azure-fdeUpgrade linux-image-awsUpgrade linux-image-oem-20.04cUpgrade linux-image-kvmUpgrade linux-image-oem-24.04aUpgrade linux-image-6.11.0-1013-oracle-64kUpgrade linux-image-5.15.0-135-genericUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-5.15.0-1021-nvidia-tegra-igxUpgrade linux-image-generic-hwe-20.04Upgrade linux-image-gcpUpgrade linux-image-6.8.0-1012-gkeopUpgrade linux-image-6.11.0-1010-raspiUpgrade linux-image-gcp-64kUpgrade linux-image-5.15.0-1073-intel-iot-realtimeUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-6.8.1-1022-realtimeUpgrade linux-image-gkeUpgrade linux-image-5.15.0-1074-nvidia-lowlatencyUpgrade linux-image-6.8.0-60-lowlatency-64kUpgrade linux-image-6.8.0-1016-azure-nvidiaUpgrade linux-image-oem-20.04dUpgrade linux-image-oem-22.04bUpgrade linux-image-5.15.0-135-lowlatency-64kUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-azureUpgrade linux-image-intel-iot-realtimeUpgrade linux-image-6.8.0-60-lowlatencyUpgrade linux-image-6.11.0-1013-oracleUpgrade linux-image-6.11.0-21-generic-64kUpgrade linux-image-5.15.0-1033-nvidia-tegra-rtUpgrade linux-image-intel-iotgUpgrade linux-image-intelUpgrade linux-image-raspi-realtimeUpgrade linux-image-oem-22.04dUpgrade linux-image-5.15.0-1077-intel-iotgUpgrade linux-image-6.8.0-1030-gcpUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-azure-cvmUpgrade linux-image-ibm-classicUpgrade linux-image-oracle-64kUpgrade linux-image-oem-24.04Upgrade linux-image-azure-lts-24.04Upgrade linux-image-azure-fipsUpgrade linux-image-gkeop-5.15Upgrade linux-image-ibm-lts-24.04Upgrade linux-image-6.8.0-1029-azureUpgrade linux-image-lowlatency-hwe-20.04Upgrade linux-image-nvidia-tegraUpgrade linux-image-5.15.0-1080-aws-fipsUpgrade linux-image-gcp-lts-24.04 | Mar 28, 2025 | Jan 11, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 29, 2025 | Jan 11, 2025 |
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