In the Linux kernel, the following vulnerability has been resolved:
rcu/nocb: Fix possible invalid rdp's->nocb_cb_kthread pointer access
In the preparation stage of CPU online, if the corresponding the rdp's->nocb_cb_kthread does not exist, will be created, there is a situation where the rdp's rcuop kthreads creation fails, and then de-offload this CPU's rdp, does not assign this CPU's rdp->nocb_cb_kthread pointer, but this rdp's->nocb_gp_rdp and rdp's->rdp_gp->nocb_gp_kthread is still valid.
This will cause the subsequent re-offload operation of this offline CPU, which will pass the conditional check and the kthread_unpark() will access invalid rdp's->nocb_cb_kthread pointer.
This commit therefore use rdp's->nocb_gp_kthread instead of rdp_gp's->nocb_gp_kthread for safety check.
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade kernel6.12-headersUpgrade kernel6.12-tools-debuginfoUpgrade kernel6.12-tools-develUpgrade kernel6.12-libbpf-develUpgrade kernel6.12-debuginfoUpgrade kernel6.12-libbpf-staticUpgrade kernel6.12-libbpfUpgrade kernel6.12-develUpgrade kernel6.12-toolsUpgrade python3-perf6.12Upgrade python3-perf6.12-debuginfoUpgrade perf6.12Upgrade perf6.12-debuginfoUpgrade kernel6.12-debuginfo-common-x86_64Upgrade kernel6.12Upgrade kernel6.12-debuginfo-common-aarch64Upgrade kernel6.12-modules-extra-commonUpgrade kernel6.12-libbpf-debuginfoUpgrade bpftool6.12Upgrade kernel6.12-modules-extraUpgrade kernel-livepatch-6.12.46-66.121Upgrade bpftool6.12-debuginfo | Sep 30, 2025 | Sep 4, 2025 |
| Debian | — | Upgrade linux-6.1Upgrade linux | May 3, 2026 | May 3, 2026 |
| Oracle_linux | — | Upgrade kernel-uek | Oct 16, 2025 | Sep 4, 2025 |
| Ubuntu | — | Upgrade linux-image-generic-64kUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-gcp-64kUpgrade linux-image-aws-64k-lts-24.04Upgrade linux-image-oem-22.04aUpgrade linux-image-lowlatency-6.8Upgrade linux-image-6.8.1-1041-realtimeUpgrade linux-image-aws-fipsUpgrade linux-image-6.8.0-1051-azureUpgrade linux-image-generic-64k-6.8Upgrade linux-image-azure-fipsUpgrade linux-image-6.8.0-1043-oracle-64kUpgrade linux-image-6.8.0-1046-nvidia-lowlatency-64kUpgrade linux-image-generic-6.8Upgrade linux-image-lowlatency-64kUpgrade linux-image-oracle-lts-24.04Upgrade linux-image-6.8.0-1047-gcp-64kUpgrade linux-image-aws-fips-6.8Upgrade linux-image-6.8.0-1046-awsUpgrade linux-image-ibm-classicUpgrade linux-image-gke-64k-6.8Upgrade linux-image-virtual-hwe-22.04Upgrade linux-image-raspi-6.8Upgrade linux-image-gke-6.8Upgrade linux-image-lowlatencyUpgrade linux-image-azure-lts-24.04Upgrade linux-image-nvidia-6.8Upgrade linux-image-6.8.0-1047-raspiUpgrade linux-image-raspi-realtime-6.8Upgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-6.8.0-1046-azureUpgrade linux-image-6.8.0-1043-gke-64kUpgrade linux-image-oracle-64k-6.8Upgrade linux-image-virtual-6.8Upgrade linux-image-gkeop-6.8Upgrade linux-image-ibmUpgrade linux-image-6.8.0-100-genericUpgrade linux-image-oem-22.04bUpgrade linux-image-ibm-6.8Upgrade linux-image-nvidiaUpgrade linux-image-kvmUpgrade linux-image-oracle-6.8Upgrade linux-image-gcp-fipsUpgrade linux-image-raspiUpgrade linux-image-aws-6.8Upgrade linux-image-6.8.0-1043-gkeUpgrade linux-image-oem-22.04cUpgrade linux-image-realtime-6.8.1Upgrade linux-image-xilinx-6.8Upgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-6.8.0-1043-oracleUpgrade linux-image-generic-lpaeUpgrade linux-image-gke-64kUpgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-6.8.0-1044-ibmUpgrade linux-image-aws-64k-6.8Upgrade linux-image-azureUpgrade linux-image-6.8.0-1046-nvidia-lowlatencyUpgrade linux-image-fipsUpgrade linux-image-6.8.0-100-lowlatencyUpgrade linux-image-6.8.0-1023-xilinxUpgrade linux-image-gcp-fips-6.8Upgrade linux-image-ibm-lts-24.04Upgrade linux-image-oem-22.04Upgrade linux-image-6.8.0-1047-gcp-fipsUpgrade linux-image-6.8.0-100-generic-64kUpgrade linux-image-awsUpgrade linux-image-gcp-64k-6.8Upgrade linux-image-6.8.0-1046-nvidiaUpgrade linux-image-virtualUpgrade linux-image-raspi-realtimeUpgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-nvidia-64k-6.8Upgrade linux-image-azure-fips-6.8Upgrade linux-image-gkeUpgrade linux-image-gcp-6.8Upgrade linux-image-intel-iot-realtimeUpgrade linux-image-aws-lts-24.04Upgrade linux-image-6.8.0-1047-gcpUpgrade linux-image-oracle-64kUpgrade linux-image-nvidia-lowlatency-6.8Upgrade linux-image-nvidia-64kUpgrade linux-image-lowlatency-64k-6.8Upgrade linux-image-gkeopUpgrade linux-image-xilinxUpgrade linux-image-fips-6.8Upgrade linux-image-azure-6.8Upgrade linux-image-aws-64kUpgrade linux-image-6.8.0-1046-aws-fipsUpgrade linux-image-intel-iotgUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-gcp-lts-24.04Upgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-realtimeUpgrade linux-image-6.8.0-100-fipsUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-genericUpgrade linux-image-6.8.0-2037-raspi-realtimeUpgrade linux-image-gcpUpgrade linux-image-6.8.0-1046-nvidia-64kUpgrade linux-image-6.8.0-100-lowlatency-64kUpgrade linux-image-oem-22.04dUpgrade linux-image-nvidia-lowlatency-64k-6.8Upgrade linux-image-6.8.0-1046-aws-64kUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-6.8.0-1030-gkeopUpgrade linux-image-6.8.0-1046-azure-fipsUpgrade linux-image-oracleUpgrade linux-image-realtime-hwe-22.04 | Feb 12, 2026 | Sep 4, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Feb 9, 2026 | Sep 4, 2025 |
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