In the Linux kernel, the following vulnerability has been resolved:
powerpc/kexec: Enable SMT before waking offline CPUs
If SMT is disabled or a partial SMT state is enabled, when a new kernel image is loaded for kexec, on reboot the following warning is observed:
kexec: Waking offline cpu 228. WARNING: CPU: 0 PID: 9062 at arch/powerpc/kexec/core_64.c:223 kexec_prepare_cpus+0x1b0/0x1bc [snip] NIP kexec_prepare_cpus+0x1b0/0x1bc LR kexec_prepare_cpus+0x1a0/0x1bc Call Trace: kexec_prepare_cpus+0x1a0/0x1bc (unreliable) default_machine_kexec+0x160/0x19c machine_kexec+0x80/0x88 kernel_kexec+0xd0/0x118 __do_sys_reboot+0x210/0x2c4 system_call_exception+0x124/0x320 system_call_vectored_common+0x15c/0x2ec
This occurs as add_cpu() fails due to cpu_bootable() returning false for CPUs that fail the cpu_smt_thread_allowed() check or non primary threads if SMT is disabled.
Fix the issue by enabling SMT and resetting the number of SMT threads to the number of threads per core, before attempting to wake up all present CPUs.
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_2023 | — | Upgrade kernel6.12-develUpgrade kernel6.12Upgrade kernel6.12-libbpf-debuginfoUpgrade kernel-livepatch-6.12.64-87.122Upgrade perf6.12-debuginfoUpgrade python3-perf6.12Upgrade kernel6.12-libbpfUpgrade kernel6.12-libbpf-staticUpgrade bpftool6.12-debuginfoUpgrade kernel6.12-modules-extra-commonUpgrade kernel6.12-modules-extraUpgrade kernel6.12-debuginfoUpgrade kernel6.12-tools-develUpgrade kernel6.12-headersUpgrade kernel6.12-debuginfo-common-x86_64Upgrade kernel6.12-debuginfo-common-aarch64Upgrade kernel6.12-tools-debuginfoUpgrade python3-perf6.12-debuginfoUpgrade bpftool6.12Upgrade perf6.12Upgrade kernel6.12-toolsUpgrade kernel6.12-libbpf-devel | Feb 20, 2026 | Jan 14, 2026 |
| Debian | — | Upgrade linux-6.1Upgrade linux | Feb 11, 2026 | Feb 11, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Jan 14, 2026 |
| Ubuntu | — | Upgrade linux-image-6.8.0-1054-azure-fipsUpgrade linux-image-6.8.0-1059-azureUpgrade linux-image-lowlatency-64kUpgrade linux-image-virtualUpgrade linux-image-oem-22.04aUpgrade linux-image-ibmUpgrade linux-image-genericUpgrade linux-image-generic-lpaeUpgrade linux-image-oem-24.04dUpgrade linux-image-6.8.0-1051-nvidia-64kUpgrade linux-image-fips-6.8Upgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-ibm-lts-24.04Upgrade linux-image-lowlatencyUpgrade linux-image-6.17.0-1011-oracle-64kUpgrade linux-image-6.17.0-1012-awsUpgrade linux-image-raspi-6.17Upgrade linux-image-6.17.0-1012-gcp-64kUpgrade linux-image-aws-64k-6.8Upgrade linux-image-nvidia-lowlatency-64k-6.8Upgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-aws-6.17Upgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-gcp-6.8Upgrade linux-image-intel-iotgUpgrade linux-image-6.17.0-1010-realtimeUpgrade linux-image-6.8.0-1054-gcp-fipsUpgrade linux-image-6.8.0-110-fipsUpgrade linux-image-6.8.0-1049-oracle-64kUpgrade linux-image-oem-24.04Upgrade linux-image-oracleUpgrade linux-image-6.17.0-22-generic-64kUpgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-oracle-64kUpgrade linux-image-fipsUpgrade linux-image-generic-6.8Upgrade linux-image-ibm-classicUpgrade linux-image-lowlatency-64k-6.8Upgrade linux-image-gkeUpgrade linux-image-6.8.0-1051-nvidiaUpgrade linux-image-nvidia-tegra-rtUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-6.8.0-110-genericUpgrade linux-image-aws-64k-lts-24.04Upgrade linux-image-generic-6.17Upgrade linux-image-6.8.0-1054-gcp-64kUpgrade linux-image-ibm-6.8Upgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-oem-22.04bUpgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-aws-64kUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-azure-6.8Upgrade linux-image-azure-fips-6.8Upgrade linux-image-6.17.0-1020-oemUpgrade linux-image-azure-lts-24.04Upgrade linux-image-gkeop-6.8Upgrade linux-image-azure-6.17Upgrade linux-image-6.8.0-1022-nvidia-tegra-rtUpgrade linux-image-oracle-lts-24.04Upgrade linux-image-6.17.0-1011-oracleUpgrade linux-image-6.8.0-1052-aws-fipsUpgrade linux-image-6.8.0-1051-nvidia-lowlatencyUpgrade linux-image-nvidia-lowlatency-6.8Upgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-oem-22.04Upgrade linux-image-nvidiaUpgrade linux-image-oem-24.04aUpgrade linux-image-oem-6.17Upgrade linux-image-gcpUpgrade linux-image-intel-iot-realtimeUpgrade linux-image-oem-24.04bUpgrade linux-image-realtime-hwe-22.04Upgrade linux-image-6.8.0-1022-nvidia-tegraUpgrade linux-image-awsUpgrade linux-image-oracle-6.17Upgrade linux-image-6.8.0-1050-gkeUpgrade linux-image-6.8.0-110-lowlatency-64kUpgrade linux-image-raspi-realtimeUpgrade linux-image-raspi-realtime-6.8Upgrade linux-image-oracle-64k-6.8Upgrade linux-image-nvidia-tegra-6.8Upgrade linux-image-realtimeUpgrade linux-image-xilinxUpgrade linux-image-6.8.0-1052-aws-64kUpgrade linux-image-6.8.1-1047-realtimeUpgrade linux-image-6.8.0-1051-ibmUpgrade linux-image-gke-64kUpgrade linux-image-azure-fipsUpgrade linux-image-6.8.0-110-generic-64kUpgrade linux-image-6.8.0-1054-gcpUpgrade linux-image-virtual-6.17Upgrade linux-image-gkeopUpgrade linux-image-gcp-64k-6.17Upgrade linux-image-aws-fips-6.8Upgrade linux-image-6.8.0-1037-gkeopUpgrade linux-image-6.17.0-1014-raspiUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-realtime-hwe-24.04Upgrade linux-image-oem-22.04cUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-gcp-64k-6.8Upgrade linux-image-aws-lts-24.04Upgrade linux-image-nvidia-64kUpgrade linux-image-lowlatency-6.8Upgrade linux-image-6.8.0-1050-gke-64kUpgrade linux-image-6.17.0-1012-aws-64kUpgrade linux-image-oem-24.04cUpgrade linux-image-gcp-fipsUpgrade linux-image-6.8.0-2042-raspi-realtimeUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-gke-6.8Upgrade linux-image-6.8.0-1052-awsUpgrade linux-image-nvidia-tegraUpgrade linux-image-6.17.0-1012-gcpUpgrade linux-image-6.8.0-1054-azureUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-azureUpgrade linux-image-raspiUpgrade linux-image-nvidia-tegra-rt-6.8Upgrade linux-image-6.8.0-1052-raspiUpgrade linux-image-6.8.0-1051-nvidia-lowlatency-64kUpgrade linux-image-aws-fipsUpgrade linux-image-gcp-64kUpgrade linux-image-realtime-6.17Upgrade linux-image-generic-64kUpgrade linux-image-aws-64k-6.17Upgrade linux-image-xilinx-6.8Upgrade linux-image-kvmUpgrade linux-image-6.8.0-110-lowlatencyUpgrade linux-image-6.17.0-1013-azureUpgrade linux-image-6.8.0-1049-oracleUpgrade linux-image-generic-64k-6.17Upgrade linux-image-gcp-lts-24.04Upgrade linux-image-6.8.0-1029-xilinxUpgrade linux-image-aws-6.8Upgrade linux-image-realtime-6.8.1Upgrade linux-image-gcp-6.17Upgrade linux-image-6.17.0-22-genericUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-virtual-6.8Upgrade linux-image-gcp-fips-6.8Upgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-oracle-6.8Upgrade linux-image-oem-22.04dUpgrade linux-image-generic-64k-6.8Upgrade linux-image-raspi-6.8Upgrade linux-image-oracle-64k-6.17Upgrade linux-image-nvidia-6.8Upgrade linux-image-gke-64k-6.8 | Apr 17, 2026 | Jan 14, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jul 10, 2026 | Jan 14, 2026 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub