In the Linux kernel, the following vulnerability has been resolved:
sched/smt: Fix unbalance sched_smt_present dec/inc
I got the following warn report while doing stress test:
jump label: negative count! WARNING: CPU: 3 PID: 38 at kernel/jump_label.c:263 static_key_slow_try_dec+0x9d/0xb0 Call Trace: <TASK> __static_key_slow_dec_cpuslocked+0x16/0x70 sched_cpu_deactivate+0x26e/0x2a0 cpuhp_invoke_callback+0x3ad/0x10d0 cpuhp_thread_fun+0x3f5/0x680 smpboot_thread_fn+0x56d/0x8d0 kthread+0x309/0x400 ret_from_fork+0x41/0x70 ret_from_fork_asm+0x1b/0x30 </TASK>
Because when cpuset_cpu_inactive() fails in sched_cpu_deactivate(), the cpu offline failed, but sched_smt_present is decremented before calling sched_cpu_deactivate(), it leads to unbalanced dec/inc, so fix it by incrementing sched_smt_present in the error path.
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-debuginfo-common-x86_64Upgrade kernel-livepatch-5.15.165-110.161Upgrade python-perf-debuginfoUpgrade kernel-tools-debuginfoUpgrade kernel-debuginfoUpgrade bpftool-debuginfoUpgrade bpftoolUpgrade perf-debuginfoUpgrade kernel-tools-develUpgrade kernel-develUpgrade python-perfUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-toolsUpgrade perfUpgrade kernel-headers | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade kernel-toolsUpgrade kernel-modules-extra-commonUpgrade kernel-livepatch-6.1.106-116.188Upgrade bpftool-debuginfoUpgrade kernelUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-libbpf-develUpgrade kernel-headersUpgrade kernel-libbpf-staticUpgrade kernel-libbpfUpgrade python3-perf-debuginfoUpgrade kernel-tools-debuginfoUpgrade python3-perfUpgrade kernel-debuginfoUpgrade kernel-modules-extraUpgrade kernel-debuginfo-common-aarch64Upgrade perf-debuginfoUpgrade bpftoolUpgrade perfUpgrade kernel-tools-develUpgrade kernel-devel | Oct 16, 2025 | Sep 4, 2024 |
| Debian | — | Upgrade linux-6.1Upgrade linux | Sep 6, 2024 | Sep 4, 2024 |
| Huawei Euleros 2_0_sp10 | — | Upgrade kernelUpgrade kernel-tools-libsUpgrade kernel-abi-stablelistsUpgrade kernel-toolsUpgrade python3-perf | Jan 14, 2025 | Sep 4, 2024 |
| Huawei Euleros 2_0_sp11 | — | Upgrade kernelUpgrade kernel-tools-libsUpgrade kernel-abi-stablelistsUpgrade bpftoolUpgrade python3-perfUpgrade kernel-tools | Feb 11, 2025 | Sep 4, 2024 |
| Huawei Euleros 2_0_sp12 | — | Upgrade kernel-abi-stablelistsUpgrade kernel-tools-libsUpgrade kernel-toolsUpgrade bpftoolUpgrade kernelUpgrade python3-perf | Dec 12, 2024 | Sep 4, 2024 |
| Huawei Euleros 2_0_sp9 | — | Upgrade kernel-tools-libsUpgrade kernelUpgrade python3-perfUpgrade kernel-tools | Jan 15, 2025 | Sep 4, 2024 |
| Oracle_linux | — | Upgrade kernel-uek | Nov 21, 2024 | Sep 4, 2024 |
| Redhat_linux | — | Upgrade kernel-rtUpgrade kernelNo solution exists | May 15, 2025 | Sep 4, 2024 |
| Suse | — | Upgrade kernel-64kb-develUpgrade kernel-azure-develUpgrade gfs2-kmp-azureUpgrade kernel-kvmsmall-develUpgrade kernel-azureUpgrade kernel-azure-optionalUpgrade gfs2-kmp-64kbUpgrade kernel-source-vanillaUpgrade kernel-zfcpdumpUpgrade kselftests-kmp-64kbUpgrade ocfs2-kmp-defaultUpgrade dtb-exynosUpgrade kernel-sourceUpgrade gfs2-kmp-defaultUpgrade kernel-default-optionalUpgrade kernel-devel-azureUpgrade dtb-caviumUpgrade dtb-mediatekUpgrade kernel-azure-livepatch-develUpgrade dtb-freescaleUpgrade kernel-rtUpgrade dtb-allwinnerUpgrade kernel-rt_debug-develUpgrade dtb-qcomUpgrade dtb-rockchipUpgrade kernel-rt-develUpgrade kernel-default-livepatchUpgrade dtb-xilinxUpgrade dlm-kmp-64kbUpgrade dtb-amazonUpgrade dtb-lgUpgrade kernel-default-base-rebuildUpgrade dtb-alteraUpgrade kernel-develUpgrade kernel-rt-livepatchUpgrade kselftests-kmp-azureUpgrade kernel-debug-vdsoUpgrade kernel-syms-azureUpgrade kernel-obs-buildUpgrade kernel-default-develUpgrade cluster-md-kmp-rtUpgrade ocfs2-kmp-64kbUpgrade gfs2-kmp-rtUpgrade kernel-kvmsmallUpgrade kernel-64kbUpgrade reiserfs-kmp-azureUpgrade kernel-default-vdsoUpgrade cluster-md-kmp-azureUpgrade kernel-source-azureUpgrade ocfs2-kmp-azureUpgrade kernel-devel-rtUpgrade reiserfs-kmp-defaultUpgrade dtb-appleUpgrade kselftests-kmp-rtUpgrade dtb-apmUpgrade kernel-source-rtUpgrade reiserfs-kmp-64kbUpgrade kernel-obs-qaUpgrade dtb-sprdUpgrade kernel-defaultUpgrade kernel-syms-rtUpgrade kernel-64kb-extraUpgrade kernel-rt_debugUpgrade dtb-nvidiaUpgrade kernel-default-livepatch-develUpgrade ocfs2-kmp-rtUpgrade kernel-symsUpgrade dtb-amlogicUpgrade dlm-kmp-defaultUpgrade kernel-rt_debug-vdsoUpgrade dtb-armUpgrade kernel-rt-extraUpgrade kernel-rt-vdsoUpgrade kernel-macrosUpgrade kernel-default-manUpgrade kernel-debugUpgrade dtb-socionextUpgrade reiserfs-kmp-rtUpgrade kernel-azure-vdsoUpgrade dtb-marvellUpgrade dtb-amdUpgrade cluster-md-kmp-defaultUpgrade kernel-docsUpgrade dlm-kmp-azureUpgrade kernel-default-baseUpgrade kernel-debug-develUpgrade dtb-hisiliconUpgrade kernel-rt-livepatch-develUpgrade kernel-docs-htmlUpgrade kernel-64kb-optionalUpgrade dtb-renesasUpgrade dtb-broadcomUpgrade dlm-kmp-rtUpgrade cluster-md-kmp-64kbUpgrade kernel-rt-optionalUpgrade kernel-azure-extraUpgrade kernel-kvmsmall-vdsoUpgrade kernel-default-extraUpgrade kernel-rt_debug-livepatch-develUpgrade kselftests-kmp-default | Dec 5, 2025 | Jun 3, 2025 |
| Ubuntu | — | Upgrade linux-image-5.15.0-1067-nvidiaUpgrade linux-image-generic-64k-hwe-20.04Upgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-gkeop-5.15Upgrade linux-image-5.15.0-125-generic-64kUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-generic-hwe-22.04Upgrade linux-image-nvidiaUpgrade linux-image-nvidia-64kUpgrade linux-image-intelUpgrade linux-image-6.8.0-1019-gcpUpgrade linux-image-oracle-64kUpgrade linux-image-oracle-lts-22.04Upgrade linux-image-lowlatency-64k-hwe-24.04Upgrade linux-image-6.8.0-1017-oracleUpgrade linux-image-5.15.0-1065-raspiUpgrade linux-image-gkeop-6.8Upgrade linux-image-oem-20.04cUpgrade linux-image-gkeUpgrade linux-image-5.15.0-1069-kvmUpgrade linux-image-oem-22.04Upgrade linux-image-5.15.0-1067-intel-iotgUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-5.15.0-125-lowlatencyUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-6.8.0-1019-nvidiaUpgrade linux-image-gkeopUpgrade linux-image-lowlatency-64kUpgrade linux-image-oem-24.04Upgrade linux-image-oem-20.04Upgrade linux-image-oem-24.04aUpgrade linux-image-oracleUpgrade linux-image-5.15.0-1038-xilinx-zynqmpUpgrade linux-image-oem-22.04bUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-5.15.0-125-lowlatency-64kUpgrade linux-image-genericUpgrade linux-image-oem-20.04bUpgrade linux-image-6.8.0-1020-azureUpgrade linux-image-6.8.0-50-generic-64kUpgrade linux-image-5.15.0-125-generic-lpaeUpgrade linux-image-lowlatency-hwe-24.04Upgrade linux-image-azure-lts-22.04Upgrade linux-image-5.15.0-1065-ibmUpgrade linux-image-5.15.0-125-genericUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-6.8.0-1002-gkeopUpgrade linux-image-5.15.0-1075-azureUpgrade linux-image-generic-64kUpgrade linux-image-virtualUpgrade linux-image-intel-iotgUpgrade linux-image-gcpUpgrade linux-image-generic-lpae-hwe-20.04Upgrade linux-image-virtual-hwe-24.04Upgrade linux-image-oem-22.04cUpgrade linux-image-oem-20.04dUpgrade linux-image-5.15.0-1067-nvidia-lowlatencyUpgrade linux-image-ibmUpgrade linux-image-lowlatencyUpgrade linux-image-6.8.0-1020-azure-fdeUpgrade linux-image-6.8.0-1016-raspiUpgrade linux-image-oem-22.04dUpgrade linux-image-5.15.0-1072-awsUpgrade linux-image-raspiUpgrade linux-image-oem-22.04aUpgrade linux-image-5.15.0-1055-gkeopUpgrade linux-image-5.15.0-1078-azureUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-awsUpgrade linux-image-aws-lts-22.04Upgrade linux-image-6.8.0-1015-gkeUpgrade linux-image-6.8.0-1017-oracle-64kUpgrade linux-image-nvidia-6.8Upgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-gke-5.15Upgrade linux-image-ibm-classicUpgrade linux-image-azureUpgrade linux-image-6.8.0-50-lowlatencyUpgrade linux-image-5.15.0-1071-gcpUpgrade linux-image-6.8.0-1020-awsUpgrade linux-image-azure-fdeUpgrade linux-image-5.15.0-1069-gkeUpgrade linux-image-nvidia-64k-6.8Upgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-6.8.0-50-genericUpgrade linux-image-6.8.0-1019-nvidia-64kUpgrade linux-image-gcp-lts-22.04Upgrade linux-image-lowlatency-hwe-20.04Upgrade linux-image-6.8.0-1017-ibmUpgrade linux-image-kvmUpgrade linux-image-lowlatency-64k-hwe-20.04Upgrade linux-image-azure-cvmUpgrade linux-image-generic-lpaeUpgrade linux-image-6.8.0-1019-nvidia-lowlatency-64kUpgrade linux-image-generic-hwe-20.04Upgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-virtual-hwe-20.04Upgrade linux-image-5.15.0-1070-oracleUpgrade linux-image-6.8.0-1018-oemUpgrade linux-image-raspi-nolpaeUpgrade linux-image-6.8.0-1019-nvidia-lowlatencyUpgrade linux-image-6.8.0-50-lowlatency-64kUpgrade linux-image-nvidia-lowlatency-64k | Nov 12, 2024 | Sep 4, 2024 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 9, 2025 | Sep 4, 2024 |
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