In the Linux kernel, the following vulnerability has been resolved:
sch_hfsc: make hfsc_qlen_notify() idempotent
hfsc_qlen_notify() is not idempotent either and not friendly to its callers, like fq_codel_dequeue(). Let's make it idempotent to ease qdisc_tree_reduce_backlog() callers' life:
1. update_vf() decreases cl->cl_nactive, so we can check whether it is non-zero before calling it.
2. eltree_remove() always removes RB node cl->el_node, but we can use RB_EMPTY_NODE() + RB_CLEAR_NODE() to make it safe.
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade bpftoolUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-livepatch-5.15.189-131.206Upgrade kernel-tools-develUpgrade kernel-livepatch-5.10.240-238.959Upgrade kernel-livepatch-4.14.355-280.664Upgrade kernel-toolsUpgrade kernelUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-develUpgrade kernel-debuginfoUpgrade kernel-headersUpgrade bpftool-debuginfoUpgrade perfUpgrade perf-debuginfoUpgrade python-perf-debuginfoUpgrade kernel-tools-debuginfoUpgrade python-perf | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade perf-debuginfoUpgrade perf6.12Upgrade kernel-headersUpgrade kernel-modules-extra-commonUpgrade kernel6.12-modules-extraUpgrade kernel6.12-debuginfoUpgrade kernel6.12-debuginfo-common-aarch64Upgrade kernelUpgrade kernel-livepatch-6.12.29-33.102Upgrade python3-perf6.12-debuginfoUpgrade kernel-toolsUpgrade kernel-libbpf-develUpgrade kernel-debuginfo-common-x86_64Upgrade perfUpgrade kernel6.12-debuginfo-common-x86_64Upgrade python3-perf-debuginfoUpgrade kernel-libbpfUpgrade kernel6.12Upgrade kernel-livepatch-6.1.140-154.222Upgrade bpftoolUpgrade python3-perf6.12Upgrade kernel-tools-develUpgrade kernel-develUpgrade kernel-libbpf-debuginfoUpgrade kernel-modules-extraUpgrade kernel-libbpf-staticUpgrade perf6.12-debuginfoUpgrade kernel-tools-debuginfoUpgrade kernel-debuginfoUpgrade kernel-debuginfo-common-aarch64Upgrade bpftool-debuginfoUpgrade python3-perf | Sep 9, 2025 | Jul 4, 2025 |
| Debian | — | Upgrade linux-6.1Upgrade linux | Jul 7, 2025 | Jul 4, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernelUpgrade kernel-toolsUpgrade kernel-abi-stablelistsUpgrade kernel-tools-libsUpgrade python3-perfUpgrade bpftool | Feb 3, 2026 | Jan 30, 2026 |
| Oracle_linux | — | Upgrade kernel-uekUpgrade kernel | Sep 19, 2025 | Jul 4, 2025 |
| Redhat_linux | — | No solution existsUpgrade kernelUpgrade kernel-rt | Jul 9, 2025 | Jul 4, 2025 |
| Suse | — | Upgrade ocfs2-kmp-azureUpgrade reiserfs-kmp-64kbUpgrade dtb-armUpgrade kernel-debug-develUpgrade kernel-default-baseUpgrade kernel-rt-livepatchUpgrade dtb-caviumUpgrade kernel-rt-develUpgrade kselftests-kmp-defaultUpgrade kernel-defaultUpgrade kernel-64kb-develUpgrade gfs2-kmp-defaultUpgrade kernel-azure-extraUpgrade dtb-mediatekUpgrade reiserfs-kmp-rtUpgrade kselftests-kmp-rtUpgrade dtb-renesasUpgrade kernel-debugUpgrade dtb-nvidiaUpgrade dtb-xilinxUpgrade dtb-sprdUpgrade kernel-azureUpgrade dtb-socionextUpgrade ocfs2-kmp-defaultUpgrade kernel-rt_debug-develUpgrade dtb-hisiliconUpgrade dtb-rockchipUpgrade dlm-kmp-defaultUpgrade kernel-rt_debugUpgrade kselftests-kmp-azureUpgrade kernel-64kb-extraUpgrade kernel-obs-buildUpgrade cluster-md-kmp-rtUpgrade dtb-allwinnerUpgrade kernel-rt-extraUpgrade dtb-amdUpgrade dlm-kmp-rtUpgrade kernel-debug-vdsoUpgrade dtb-alteraUpgrade kernel-default-livepatch-develUpgrade kernel-devel-rtUpgrade cluster-md-kmp-64kbUpgrade kernel-docsUpgrade kernel-develUpgrade kernel-default-optionalUpgrade kernel-source-rtUpgrade dtb-appleUpgrade kernel-rt-optionalUpgrade kernel-docs-htmlUpgrade kernel-source-vanillaUpgrade reiserfs-kmp-defaultUpgrade dtb-marvellUpgrade gfs2-kmp-azureUpgrade kernel-64kb-optionalUpgrade kernel-preempt-develUpgrade kernel-kvmsmallUpgrade dtb-amlogicUpgrade cluster-md-kmp-defaultUpgrade kernel-default-base-rebuildUpgrade ocfs2-kmp-rtUpgrade kernel-symsUpgrade kernel-kvmsmall-vdsoUpgrade kernel-azure-vdsoUpgrade dtb-freescaleUpgrade dtb-lgUpgrade kernel-zfcpdumpUpgrade kernel-rt_debug-vdsoUpgrade kernel-devel-azureUpgrade kselftests-kmp-64kbUpgrade kernel-syms-rtUpgrade gfs2-kmp-rtUpgrade kernel-macrosUpgrade kernel-azure-optionalUpgrade dtb-exynosUpgrade cluster-md-kmp-azureUpgrade kernel-kvmsmall-develUpgrade dlm-kmp-azureUpgrade kernel-rtUpgrade kernel-preemptUpgrade kernel-default-livepatchUpgrade kernel-default-vdsoUpgrade kernel-source-azureUpgrade dtb-qcomUpgrade dtb-amazonUpgrade kernel-syms-azureUpgrade kernel-rt-livepatch-develUpgrade reiserfs-kmp-azureUpgrade kernel-obs-qaUpgrade ocfs2-kmp-64kbUpgrade kernel-default-develUpgrade dtb-broadcomUpgrade dtb-apmUpgrade dlm-kmp-64kbUpgrade kernel-rt-vdsoUpgrade kernel-64kbUpgrade kernel-sourceUpgrade kernel-azure-develUpgrade gfs2-kmp-64kbUpgrade kernel-default-manUpgrade kernel-default-extra | Dec 5, 2025 | Sep 4, 2025 |
| Ubuntu | — | Upgrade linux-image-raspi-hwe-18.04Upgrade linux-image-5.4.0-219-genericUpgrade linux-image-ibm-lts-20.04Upgrade linux-image-azure-fipsUpgrade linux-image-gcpUpgrade linux-image-generic-hwe-22.04Upgrade linux-image-aws-64k-6.14Upgrade linux-image-5.4.0-1146-oracleUpgrade linux-image-oem-22.04dUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-5.4.0-1052-iotUpgrade linux-image-kvmUpgrade linux-image-6.14.0-1009-awsUpgrade linux-image-6.8.0-64-generic-64kUpgrade linux-image-5.4.0-1107-bluefieldUpgrade linux-image-aws-6.14Upgrade linux-image-5.15.0-1083-intel-iotgUpgrade linux-image-5.4.0-1066-xilinx-zynqmpUpgrade linux-image-gcp-5.4Upgrade linux-image-oem-22.04bUpgrade linux-image-azure-5.15Upgrade linux-image-6.14.0-1009-aws-64kUpgrade linux-image-fips-5.4Upgrade linux-image-gcp-fipsUpgrade linux-image-raspi-5.15Upgrade linux-image-5.4.0-1154-azure-fipsUpgrade linux-image-aws-64kUpgrade linux-image-raspiUpgrade linux-image-5.4.0-1151-gcpUpgrade linux-image-generic-hwe-18.04Upgrade linux-image-virtual-6.8Upgrade linux-image-oem-osp1Upgrade linux-image-aws-lts-20.04Upgrade linux-image-generic-6.8Upgrade linux-image-oem-22.04cUpgrade linux-image-raspi-5.4Upgrade linux-image-5.4.0-219-generic-lpaeUpgrade linux-image-intel-iotgUpgrade linux-image-azureUpgrade linux-image-intelUpgrade linux-image-virtual-hwe-18.04Upgrade linux-image-5.4.0-1151-gcp-fipsUpgrade linux-image-generic-lpae-5.4Upgrade linux-image-raspi2Upgrade linux-image-generic-5.4Upgrade linux-image-oemUpgrade linux-image-gcp-lts-20.04Upgrade linux-image-ibmUpgrade linux-image-genericUpgrade linux-image-awsUpgrade linux-image-5.4.0-1148-awsUpgrade linux-image-xilinx-zynqmp-5.4Upgrade linux-image-fipsUpgrade linux-image-azure-fips-5.15Upgrade linux-image-azure-5.4Upgrade linux-image-5.4.0-1135-kvmUpgrade linux-image-virtualUpgrade linux-image-generic-lpaeUpgrade linux-image-6.8.0-64-genericUpgrade linux-image-lowlatency-5.4Upgrade linux-image-5.15.0-1083-raspiUpgrade linux-image-azure-lts-20.04Upgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-5.4.0-1148-aws-fipsUpgrade linux-image-intel-iotg-5.15Upgrade linux-image-ibm-5.4Upgrade linux-image-aws-5.4Upgrade linux-image-gcp-fips-5.4Upgrade linux-image-5.15.0-1094-azure-fipsUpgrade linux-image-lowlatency-hwe-18.04Upgrade linux-image-bluefield-5.4Upgrade linux-image-azure-cvmUpgrade linux-image-5.4.0-1122-fipsUpgrade linux-image-oracle-5.4Upgrade linux-image-snapdragon-5.4Upgrade linux-image-oem-22.04aUpgrade linux-image-5.4.0-1094-ibmUpgrade linux-image-oracle-lts-20.04Upgrade linux-image-oem-22.04Upgrade linux-image-lowlatencyUpgrade linux-image-5.15.0-1094-azureUpgrade linux-image-5.4.0-219-lowlatencyUpgrade linux-image-5.4.0-1131-raspiUpgrade linux-image-bluefieldUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-kvm-5.4Upgrade linux-image-virtual-5.4Upgrade linux-image-raspi-nolpaeUpgrade linux-image-oracleUpgrade linux-image-azure-fips-5.4Upgrade linux-image-5.4.0-1153-azureUpgrade linux-image-generic-64k-6.8Upgrade linux-image-aws-fips-5.4Upgrade linux-image-snapdragon-hwe-18.04Upgrade linux-image-aws-fips | Jul 9, 2025 | Jul 4, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Sep 19, 2025 | Jul 4, 2025 |
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