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 kernel-toolsUpgrade kernel-livepatch-5.15.189-131.206Upgrade bpftoolUpgrade kernel-livepatch-5.10.240-238.959Upgrade kernel-livepatch-4.14.355-280.664Upgrade kernel-tools-develUpgrade kernelUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-headersUpgrade perf-debuginfoUpgrade python-perf-debuginfoUpgrade kernel-debuginfoUpgrade bpftool-debuginfoUpgrade perfUpgrade kernel-develUpgrade python-perfUpgrade kernel-tools-debuginfoUpgrade kernel-debuginfo-common-aarch64 | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade kernel-debuginfo-common-x86_64Upgrade kernelUpgrade kernel6.12-debuginfo-common-aarch64Upgrade kernel-libbpf-develUpgrade kernel-toolsUpgrade kernel-modules-extra-commonUpgrade python3-perf6.12-debuginfoUpgrade kernel-headersUpgrade perf6.12Upgrade kernel6.12-modules-extraUpgrade kernel-livepatch-6.12.29-33.102Upgrade kernel6.12-debuginfoUpgrade perf-debuginfoUpgrade kernel6.12-debuginfo-common-x86_64Upgrade kernel-libbpfUpgrade kernel-modules-extraUpgrade kernel-libbpf-staticUpgrade kernel-tools-develUpgrade kernel-develUpgrade python3-perf-debuginfoUpgrade kernel-debuginfo-common-aarch64Upgrade bpftool-debuginfoUpgrade kernel-livepatch-6.1.140-154.222Upgrade bpftoolUpgrade kernel6.12Upgrade perf6.12-debuginfoUpgrade python3-perfUpgrade perfUpgrade kernel-tools-debuginfoUpgrade kernel-debuginfoUpgrade python3-perf6.12Upgrade kernel-libbpf-debuginfo | Sep 9, 2025 | Jul 4, 2025 |
| Debian | — | Upgrade linuxUpgrade linux-6.1 | Jul 7, 2025 | Jul 4, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernel-toolsUpgrade kernel-abi-stablelistsUpgrade kernelUpgrade kernel-tools-libsUpgrade bpftoolUpgrade python3-perf | 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 kernel-debug-develUpgrade ocfs2-kmp-azureUpgrade kernel-default-baseUpgrade kernel-defaultUpgrade dtb-renesasUpgrade gfs2-kmp-defaultUpgrade kernel-rt-livepatchUpgrade kernel-rt_debugUpgrade kernel-default-optionalUpgrade reiserfs-kmp-defaultUpgrade dtb-marvellUpgrade dtb-armUpgrade reiserfs-kmp-64kbUpgrade kernel-azure-extraUpgrade kernel-rt-develUpgrade kernel-rt_debug-develUpgrade ocfs2-kmp-defaultUpgrade kernel-docs-htmlUpgrade kernel-obs-buildUpgrade dlm-kmp-defaultUpgrade dtb-sprdUpgrade kernel-rt-extraUpgrade kernel-64kb-develUpgrade dtb-socionextUpgrade reiserfs-kmp-rtUpgrade kernel-azureUpgrade dtb-amdUpgrade dtb-xilinxUpgrade kernel-debugUpgrade gfs2-kmp-azureUpgrade dtb-mediatekUpgrade dtb-caviumUpgrade kernel-64kb-optionalUpgrade kernel-preempt-develUpgrade dtb-nvidiaUpgrade kernel-source-rtUpgrade kselftests-kmp-azureUpgrade kernel-devel-rtUpgrade cluster-md-kmp-64kbUpgrade dtb-appleUpgrade kernel-source-vanillaUpgrade dtb-hisiliconUpgrade kernel-develUpgrade dtb-allwinnerUpgrade kernel-docsUpgrade kernel-debug-vdsoUpgrade kernel-64kb-extraUpgrade dtb-alteraUpgrade kernel-rt-optionalUpgrade kernel-default-livepatch-develUpgrade kselftests-kmp-defaultUpgrade kselftests-kmp-rtUpgrade dlm-kmp-rtUpgrade cluster-md-kmp-rtUpgrade dtb-rockchipUpgrade kernel-rt_debug-vdsoUpgrade kernel-azure-optionalUpgrade kernel-macrosUpgrade kernel-default-manUpgrade kernel-default-extraUpgrade dtb-exynosUpgrade cluster-md-kmp-azureUpgrade kernel-azure-develUpgrade gfs2-kmp-64kbUpgrade cluster-md-kmp-defaultUpgrade gfs2-kmp-rtUpgrade kernel-default-livepatchUpgrade kernel-syms-rtUpgrade kernel-rtUpgrade kselftests-kmp-64kbUpgrade kernel-rt-livepatch-develUpgrade kernel-kvmsmallUpgrade dtb-amlogicUpgrade reiserfs-kmp-azureUpgrade kernel-zfcpdumpUpgrade kernel-devel-azureUpgrade dtb-lgUpgrade kernel-source-azureUpgrade kernel-obs-qaUpgrade kernel-default-vdsoUpgrade kernel-syms-azureUpgrade dtb-qcomUpgrade dtb-amazonUpgrade kernel-64kbUpgrade dlm-kmp-64kbUpgrade dtb-apmUpgrade kernel-rt-vdsoUpgrade kernel-sourceUpgrade dtb-broadcomUpgrade kernel-default-develUpgrade dtb-freescaleUpgrade ocfs2-kmp-rtUpgrade kernel-default-base-rebuildUpgrade kernel-azure-vdsoUpgrade ocfs2-kmp-64kbUpgrade kernel-preemptUpgrade kernel-kvmsmall-develUpgrade dlm-kmp-azureUpgrade kernel-kvmsmall-vdsoUpgrade kernel-syms | Dec 5, 2025 | Sep 4, 2025 |
| Ubuntu | — | Upgrade linux-image-generic-lpaeUpgrade linux-image-virtualUpgrade linux-image-6.8.0-64-genericUpgrade linux-image-lowlatency-5.4Upgrade linux-image-lowlatencyUpgrade linux-image-oem-22.04Upgrade linux-image-ibm-5.4Upgrade linux-image-oracle-lts-20.04Upgrade linux-image-5.15.0-1094-azureUpgrade linux-image-5.4.0-1131-raspiUpgrade linux-image-raspi-nolpaeUpgrade linux-image-azure-lts-20.04Upgrade linux-image-bluefieldUpgrade linux-image-5.4.0-219-lowlatencyUpgrade linux-image-generic-64k-6.8Upgrade linux-image-gcp-lts-20.04Upgrade linux-image-gcp-fips-5.4Upgrade linux-image-5.15.0-1083-raspiUpgrade linux-image-kvm-5.4Upgrade linux-image-5.4.0-1135-kvmUpgrade linux-image-azure-fips-5.15Upgrade linux-image-virtual-5.4Upgrade linux-image-fipsUpgrade linux-image-oracle-5.4Upgrade linux-image-azure-5.4Upgrade linux-image-xilinx-zynqmpUpgrade linux-image-5.15.0-1094-azure-fipsUpgrade linux-image-azure-cvmUpgrade linux-image-lowlatency-hwe-18.04Upgrade linux-image-5.4.0-1122-fipsUpgrade linux-image-ibmUpgrade linux-image-oemUpgrade linux-image-bluefield-5.4Upgrade linux-image-snapdragon-5.4Upgrade linux-image-xilinx-zynqmp-5.4Upgrade linux-image-5.4.0-1148-awsUpgrade linux-image-5.4.0-1148-aws-fipsUpgrade linux-image-genericUpgrade linux-image-oracleUpgrade linux-image-snapdragon-hwe-18.04Upgrade linux-image-awsUpgrade linux-image-5.4.0-1094-ibmUpgrade linux-image-aws-fips-5.4Upgrade linux-image-azure-fips-5.4Upgrade linux-image-aws-fipsUpgrade linux-image-generic-5.4Upgrade linux-image-5.4.0-1153-azureUpgrade linux-image-aws-5.4Upgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-intel-iotg-5.15Upgrade linux-image-oem-22.04aUpgrade linux-image-raspi-hwe-18.04Upgrade linux-image-azure-fipsUpgrade linux-image-gcp-5.4Upgrade linux-image-intelUpgrade linux-image-kvmUpgrade linux-image-oem-22.04cUpgrade linux-image-generic-hwe-18.04Upgrade linux-image-5.4.0-1151-gcp-fipsUpgrade linux-image-aws-64k-6.14Upgrade linux-image-generic-hwe-22.04Upgrade linux-image-5.4.0-1146-oracleUpgrade linux-image-gcpUpgrade linux-image-ibm-lts-20.04Upgrade linux-image-oem-22.04bUpgrade linux-image-raspi2Upgrade linux-image-5.4.0-1151-gcpUpgrade linux-image-virtual-6.8Upgrade linux-image-5.4.0-219-genericUpgrade linux-image-oem-22.04dUpgrade linux-image-aws-6.14Upgrade linux-image-5.4.0-1052-iotUpgrade linux-image-virtual-hwe-22.04Upgrade linux-image-6.8.0-64-generic-64kUpgrade linux-image-6.14.0-1009-awsUpgrade linux-image-oem-osp1Upgrade linux-image-fips-5.4Upgrade linux-image-raspi-5.15Upgrade linux-image-azure-5.15Upgrade linux-image-aws-lts-20.04Upgrade linux-image-aws-64kUpgrade linux-image-5.4.0-1154-azure-fipsUpgrade linux-image-5.4.0-1107-bluefieldUpgrade linux-image-5.4.0-1066-xilinx-zynqmpUpgrade linux-image-5.15.0-1083-intel-iotgUpgrade linux-image-6.14.0-1009-aws-64kUpgrade linux-image-raspiUpgrade linux-image-generic-6.8Upgrade linux-image-gcp-fipsUpgrade linux-image-azureUpgrade linux-image-5.4.0-219-generic-lpaeUpgrade linux-image-intel-iotgUpgrade linux-image-generic-lpae-5.4Upgrade linux-image-virtual-hwe-18.04Upgrade linux-image-raspi-5.4 | 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 |
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