In the Linux kernel, the following vulnerability has been resolved:
libceph: Reject monmaps advertising zero monitors
A message of type CEPH_MSG_MON_MAP contains a monmap that is sent from a monitor to the client. This monmap contains information about the existing monitors in the cluster. Currently, a monmap indicating that there are zero monitors in the cluster is treated as valid. However, it is impossible to have zero monitors in the cluster and still receive a valid monmap from a monitor. Therefore, such a monmap must be corrupted and should be treated as invalid. Furthermore, a monmap with a monitor count of zero can subsequently crash the client when attempting to open a session with a monitor in __open_session(). This happens because the "BUG_ON(monc->monmap->num_mon < 1)" assertion in pick_new_mon() is triggered.
This patch extends a check in ceph_monmap_decode() to also reject arriving mon_maps with num_mon == 0 rather than only with num_mon > CEPH_MAX_MON.
[ idryomov: drop "log output for unusual values of num_mon" part ]
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade kernel-rt-develUpgrade kernel-rt-64k-modules-coreUpgrade kernel-rt-modulesUpgrade kernel-64k-debug-coreUpgrade kernel-zfcpdump-modules-extraUpgrade kernel-64k-debug-modulesUpgrade kernel-develUpgrade kernel-64k-develUpgrade kernel-coreUpgrade kernel-rt-64k-debug-modules-coreUpgrade kernel-debug-uki-virtUpgrade kernel-rt-debug-coreUpgrade kernel-modulesUpgrade kernel-64k-modules-coreUpgrade bpftoolUpgrade kernel-debug-modules-extraUpgrade kernel-zfcpdumpUpgrade kernel-rt-64k-debug-modules-extraUpgrade kernel-64kUpgrade kernel-modules-extraUpgrade kernel-rt-coreUpgrade kernel-debug-modules-coreUpgrade kernel-zfcpdump-devel-matchedUpgrade kernel-rt-64k-coreUpgrade kernel-64k-modules-extraUpgrade kernel-rt-debug-modulesUpgrade kernel-rt-64k-develUpgrade kernel-rt-64k-debugUpgrade kernel-debug-modulesUpgrade kernel-64k-debug-develUpgrade kernel-debug-develUpgrade kernel-debugUpgrade kernel-tools-libsUpgrade kernel-rt-debug-modules-coreUpgrade rtlaUpgrade kernel-rt-debugUpgrade kernel-64k-debug-modules-coreUpgrade kernel-64k-modulesUpgrade kernel-zfcpdump-develUpgrade kernel-debug-coreUpgrade kernel-zfcpdump-coreUpgrade libperfUpgrade kernel-devel-matchedUpgrade kernelUpgrade kernel-cross-headersUpgrade kernel-docUpgrade kernel-64k-debugUpgrade kernel-toolsUpgrade kernel-rt-64k-modules-extraUpgrade kernel-uki-virt-addonsUpgrade kernel-zfcpdump-modules-coreUpgrade kernel-rt-modules-extraUpgrade kernel-rt-64kUpgrade kernel-rt-64k-debug-coreUpgrade kernel-rt-modules-coreUpgrade kernel-abi-stablelistsUpgrade kernel-uki-virtUpgrade python3-perfUpgrade kernel-modules-coreUpgrade kernel-zfcpdump-modulesUpgrade kernel-rt-64k-modulesUpgrade kernel-rt-64k-debug-develUpgrade kernel-64k-debug-modules-extraUpgrade kernel-64k-debug-devel-matchedUpgrade rvUpgrade kernel-64k-devel-matchedUpgrade kernel-rt-debug-develUpgrade kernel-rtUpgrade kernel-64k-coreUpgrade kernel-tools-libs-develUpgrade perfUpgrade kernel-headersUpgrade kernel-debug-devel-matchedUpgrade kernel-rt-debug-modules-extraUpgrade kernel-rt-64k-debug-modules | Oct 11, 2026 | Sep 22, 2026 |
| Amazon_linux_2023 | — | Upgrade kernel-toolsUpgrade bpftoolUpgrade kernel-livepatch-6.1.182-227.379Upgrade kernel6.18-tools-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade kernel6.12-tools-debuginfoUpgrade kernel6.18-tools-develUpgrade bpftool6.12Upgrade perf6.12Upgrade python3-perf6.18Upgrade kernel6.18-develUpgrade kernel6.18-debuginfo-common-x86_64Upgrade bpftool6.18-debuginfoUpgrade kernel6.18-headersUpgrade kernel6.18-debuginfoUpgrade python3-perf6.12-debuginfoUpgrade kernel-modules-extra-commonUpgrade kernel6.18Upgrade perfUpgrade kernel6.12-modules-extra-commonUpgrade bpftool6.18Upgrade python3-perf6.12Upgrade perf6.18-debuginfoUpgrade kernel6.12-debuginfoUpgrade bpftool-debuginfoUpgrade kernel6.12Upgrade kernel-tools-develUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-modules-extraUpgrade kernel-headersUpgrade perf6.18Upgrade kernel-tools-debuginfoUpgrade kernel6.12-headersUpgrade kernel6.12-toolsUpgrade perf-debuginfoUpgrade kernel6.12-debuginfo-common-aarch64Upgrade kernel-develUpgrade kernelUpgrade kernel-livepatch-6.12.103-127.188Upgrade perf6.12-debuginfoUpgrade kernel6.12-modules-extraUpgrade kernel-livepatch-6.18.44-99.149Upgrade kernel6.12-debuginfo-common-x86_64Upgrade kernel6.18-debuginfo-common-aarch64Upgrade kernel6.12-tools-develUpgrade kernel6.12-develUpgrade python3-perf6.18-debuginfoUpgrade python3-perf-debuginfoUpgrade kernel6.18-modules-extra-commonUpgrade kernel6.18-modules-extraUpgrade kernel6.18-toolsUpgrade kernel-debuginfoUpgrade python3-perfUpgrade microvm-kernel6.18Upgrade bpftool6.12-debuginfo | Sep 1, 2026 | Aug 10, 2026 |
| Debian | — | Upgrade linux-6.12Upgrade linux | Aug 11, 2026 | Aug 11, 2026 |
| Redhat_linux | — | Upgrade kernel-rtNo solution existsUpgrade kernel | Aug 13, 2026 | Aug 10, 2026 |
| Rocky_linux | — | Upgrade kernel-devel-matchedUpgrade kernel-zfcpdump-coreUpgrade kernel-rt-coreUpgrade kernelUpgrade libperfUpgrade kernel-rt-kvmUpgrade kernel-debug-devel-matchedUpgrade bpftoolUpgrade kernel-rt-debug-coreUpgrade kernel-tools-libs-develUpgrade kernel-zfcpdump-debuginfoUpgrade kernel-zfcpdump-modules-coreUpgrade python3-perfUpgrade libperf-debuginfoUpgrade kernel-rt-modules-extraUpgrade kernel-develUpgrade perfUpgrade kernel-zfcpdump-devel-matchedUpgrade kernel-zfcpdumpUpgrade kernel-debug-modules-extraUpgrade kernel-modules-coreUpgrade kernel-toolsUpgrade kernel-rt-debug-develUpgrade kernel-modules-extraUpgrade kernel-debug-debuginfoUpgrade kernel-zfcpdump-modulesUpgrade kernel-rt-debuginfo-common-x86_64Upgrade kernel-rt-modulesUpgrade kernel-debug-develUpgrade kernel-rt-debug-modulesUpgrade kernel-rt-modules-coreUpgrade kernel-debugUpgrade kernel-coreUpgrade kernel-tools-libsUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-debug-coreUpgrade kernel-tools-debuginfoUpgrade rvUpgrade kernel-zfcpdump-develUpgrade kernel-uki-virtUpgrade kernel-rt-develUpgrade kernel-rt-debuginfoUpgrade kernel-debug-modules-coreUpgrade kernel-rt-debug-modules-extraUpgrade perf-debuginfoUpgrade rtlaUpgrade kernel-zfcpdump-modules-extraUpgrade kernel-debuginfo-common-s390xUpgrade kernel-debuginfoUpgrade kernel-rt-debug-debuginfoUpgrade kernel-rt-debugUpgrade kernel-rtUpgrade kernel-modules-extra-matchedUpgrade kernel-modulesUpgrade kernel-uki-virt-addonsUpgrade kernel-debug-uki-virtUpgrade kernel-debug-modulesUpgrade bpftool-debuginfoUpgrade kernel-rt-debug-kvmUpgrade python3-perf-debuginfoUpgrade kernel-rt-debug-modules-core | Sep 28, 2026 | Sep 24, 2026 |
| Ubuntu | — | Upgrade linux-image-generic-lpaeUpgrade linux-image-7.0.0-1014-gcp-64kUpgrade linux-image-5.15.0-1113-gkeUpgrade linux-image-nvidiaUpgrade linux-image-7.0.0-1015-ibmUpgrade linux-image-virtual-hwe-26.04Upgrade linux-image-7.0.0-1008-gkeUpgrade linux-image-oracle-64k-7.0Upgrade linux-image-5.15.0-1109-intel-iot-realtimeUpgrade linux-image-nvidia-tegraUpgrade linux-image-5.15.0-195-lowlatency-64kUpgrade linux-image-7.0.0-1008-gke-64kUpgrade linux-image-azure-lts-26.04Upgrade linux-image-lowlatencyUpgrade linux-image-oem-26.04Upgrade linux-image-5.15.0-1123-azure-fipsUpgrade linux-image-7.0.0-38-genericUpgrade linux-image-azure-fdeUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-lowlatency-hwe-20.04Upgrade linux-image-azure-7.0Upgrade linux-image-oracle-7.0Upgrade linux-image-aws-lts-22.04Upgrade linux-image-fips-5.15Upgrade linux-image-7.0.0-38-generic-64kUpgrade linux-image-gcp-7.0Upgrade linux-image-oracle-64kUpgrade linux-image-5.15.0-1112-intel-iotgUpgrade linux-image-azure-fde-lts-22.04Upgrade linux-image-generic-hwe-24.04Upgrade linux-image-7.0.0-1015-oemUpgrade linux-image-azureUpgrade linux-image-5.15.0-1117-aws-fipsUpgrade linux-image-gcp-lts-22.04Upgrade linux-image-generic-64kUpgrade linux-image-oracle-5.15Upgrade linux-image-lowlatency-64kUpgrade linux-image-gke-64k-7.0Upgrade linux-image-7.0.0-1014-awsUpgrade linux-image-aws-64k-5.15Upgrade linux-image-oem-20.04bUpgrade linux-image-azure-fde-7.0Upgrade linux-image-ibm-7.0Upgrade linux-image-5.15.0-1100-gkeopUpgrade linux-image-gke-5.15Upgrade linux-image-azure-fipsUpgrade linux-image-5.15.0-198-generic-64kUpgrade linux-image-gcpUpgrade linux-image-realtime-64k-hwe-26.04Upgrade linux-image-gcp-fipsUpgrade linux-image-genericUpgrade linux-image-azure-lts-22.04Upgrade linux-image-ibmUpgrade linux-image-7.0.0-1013-oracleUpgrade linux-image-generic-64k-hwe-20.04Upgrade linux-image-oem-20.04dUpgrade linux-image-kvmUpgrade linux-image-gke-64kUpgrade linux-image-nvidia-5.15Upgrade linux-image-kvm-5.15Upgrade linux-image-intel-iot-realtime-5.15Upgrade linux-image-lowlatency-64k-hwe-20.04Upgrade linux-image-oem-20.04cUpgrade linux-image-realtime-hwe-26.04Upgrade linux-image-intel-iot-realtimeUpgrade linux-image-awsUpgrade linux-image-7.0.0-1017-azureUpgrade linux-image-7.0.0-1013-oracle-64kUpgrade linux-image-6.8.0-1036-nvidia-tegra-rtUpgrade linux-image-generic-5.15Upgrade linux-image-5.15.0-195-lowlatencyUpgrade linux-image-realtimeUpgrade linux-image-oracleUpgrade linux-image-gcp-64kUpgrade linux-image-aws-fips-5.15Upgrade linux-image-aws-64k-lts-22.04Upgrade linux-image-aws-64kUpgrade linux-image-5.15.0-198-fipsUpgrade linux-image-5.15.0-1118-gcpUpgrade linux-image-intel-iotg-5.15Upgrade linux-image-realtime-7.0Upgrade linux-image-7.0.0-1016-azure-fdeUpgrade linux-image-6.8.0-1036-nvidia-tegraUpgrade linux-image-5.15.0-1117-aws-64kUpgrade linux-image-5.15.0-1117-awsUpgrade linux-image-oem-20.04Upgrade linux-image-5.15.0-1080-xilinx-zynqmpUpgrade linux-image-oem-7.0Upgrade linux-image-gcp-64k-7.0Upgrade linux-image-aws-7.0Upgrade linux-image-5.15.0-198-generic-lpaeUpgrade linux-image-5.15.0-1122-azure-fdeUpgrade linux-image-5.15.0-1109-kvmUpgrade linux-image-virtual-hwe-24.04Upgrade linux-image-virtualUpgrade linux-image-realtime-64k-7.0Upgrade linux-image-oem-26.04aUpgrade linux-image-nvidia-lowlatency-5.15Upgrade linux-image-gke-7.0Upgrade linux-image-lowlatency-64k-5.15Upgrade linux-image-gkeUpgrade linux-image-generic-hwe-20.04Upgrade linux-image-intelUpgrade linux-image-5.15.0-1114-oracleUpgrade linux-image-generic-lpae-hwe-20.04Upgrade linux-image-generic-hwe-26.04Upgrade linux-image-generic-7.0Upgrade linux-image-gcp-5.15Upgrade linux-image-azure-5.15Upgrade linux-image-aws-64k-7.0Upgrade linux-image-5.15.0-198-genericUpgrade linux-image-realtime-64kUpgrade linux-image-virtual-hwe-20.04Upgrade linux-image-intel-iotgUpgrade linux-image-gke-hwe-26.04Upgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-7.0.0-1014-gcpUpgrade linux-image-5.15.0-1118-gcp-fipsUpgrade linux-image-gkeopUpgrade linux-image-gke-64k-hwe-26.04Upgrade linux-image-aws-5.15Upgrade linux-image-fipsUpgrade linux-image-azure-cvmUpgrade linux-image-realtime-5.15Upgrade linux-image-7.0.0-38-realtimeUpgrade linux-image-7.0.0-1014-aws-64kUpgrade linux-image-5.15.0-1112-nvidiaUpgrade linux-image-lowlatency-5.15Upgrade linux-image-azure-fips-5.15Upgrade linux-image-oracle-lts-22.04Upgrade linux-image-generic-lpae-5.15Upgrade linux-image-generic-64k-5.15Upgrade linux-image-azure-fde-lts-26.04Upgrade linux-image-aws-fipsUpgrade linux-image-gkeop-5.15Upgrade linux-image-5.15.0-1111-ibmUpgrade linux-image-xilinx-zynqmp-5.15Upgrade linux-image-virtual-5.15Upgrade linux-image-ibm-5.15Upgrade linux-image-virtual-7.0Upgrade linux-image-nvidia-tegra-rt-6.8Upgrade linux-image-nvidia-tegra-rtUpgrade linux-image-nvidia-tegra-6.8Upgrade linux-image-generic-64k-7.0Upgrade linux-image-generic-64k-hwe-26.04Upgrade linux-image-gcp-fips-5.15Upgrade linux-image-azure-fde-5.15Upgrade linux-image-7.0.0-38-realtime-64kUpgrade linux-image-5.15.0-1116-realtimeUpgrade linux-image-5.15.0-1112-nvidia-lowlatencyUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-5.15.0-1123-azure | Oct 6, 2026 | Oct 6, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Aug 17, 2026 | Aug 10, 2026 |
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