In the Linux kernel, the following vulnerability has been resolved:
netfilter: ipset: Rework long task execution when adding/deleting entries
When adding/deleting large number of elements in one step in ipset, it can take a reasonable amount of time and can result in soft lockup errors. The patch 5f7b51bf09ba ("netfilter: ipset: Limit the maximal range of consecutive elements to add/delete") tried to fix it by limiting the max elements to process at all. However it was not enough, it is still possible that we get hung tasks. Lowering the limit is not reasonable, so the approach in this patch is as follows: rely on the method used at resizing sets and save the state when we reach a smaller internal batch limit, unlock/lock and proceed from the saved state. Thus we can avoid long continuous tasks and at the same time removed the limit to add/delete large number of elements in one step.
The nfnl mutex is held during the whole operation which prevents one to issue other ipset commands in parallel.
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 python-perfUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-toolsUpgrade perf-debuginfoUpgrade kernel-tools-develUpgrade python-perf-debuginfoUpgrade kernel-livepatch-5.10.165-143.735Upgrade kernel-headersUpgrade perfUpgrade bpftoolUpgrade kernelUpgrade kernel-livepatch-5.15.90-54.138Upgrade kernel-develUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-debuginfoUpgrade bpftool-debuginfoUpgrade kernel-tools-debuginfo | May 20, 2026 | May 20, 2026 |
| Debian | — | Upgrade linux | Oct 6, 2025 | Oct 6, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernel-abi-stablelistsUpgrade bpftoolUpgrade kernel-toolsUpgrade kernel-tools-libsUpgrade kernelUpgrade python3-perf | Feb 3, 2026 | Feb 2, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Oct 4, 2025 |
| Ubuntu | — | Upgrade linux-intel-iot-realtimeUpgrade linux-gkeUpgrade linux-nvidia-tegra-5.15Upgrade linux-awsUpgrade linux-gkeopUpgrade linux-oracle-5.15Upgrade linux-riscv-5.15Upgrade linux-azure-5.15Upgrade linux-gcpUpgrade linuxUpgrade linux-lowlatency-hwe-5.15Upgrade linux-aws-5.15Upgrade linux-intel-iotgUpgrade linux-nvidiaUpgrade linux-azure-fdeUpgrade linux-realtimeUpgrade linux-bluefieldUpgrade linux-lowlatencyUpgrade linux-azureUpgrade linux-oracleUpgrade linux-intel-iotg-5.15Upgrade linux-hwe-5.15Upgrade linux-ibmUpgrade linux-kvmUpgrade linux-gcp-5.15Upgrade linux-raspi | Oct 10, 2025 | Oct 4, 2025 |
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