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 perf-debuginfoUpgrade kernel-headersUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-toolsUpgrade python-perf-debuginfoUpgrade python-perfUpgrade perfUpgrade kernel-livepatch-5.10.165-143.735Upgrade kernel-tools-develUpgrade kernel-debuginfoUpgrade bpftool-debuginfoUpgrade bpftoolUpgrade kernel-tools-debuginfoUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-develUpgrade kernel-livepatch-5.15.90-54.138Upgrade kernel | May 20, 2026 | May 20, 2026 |
| Debian | — | Upgrade linux | Oct 6, 2025 | Oct 6, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernel-toolsUpgrade kernel-abi-stablelistsUpgrade bpftoolUpgrade 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-nvidiaUpgrade linux-raspiUpgrade linux-bluefieldUpgrade linux-kvmUpgrade linux-intel-iotgUpgrade linux-intel-iotg-5.15Upgrade linux-aws-5.15Upgrade linux-azureUpgrade linux-lowlatencyUpgrade linux-oracleUpgrade linux-hwe-5.15Upgrade linux-realtimeUpgrade linux-gcp-5.15Upgrade linux-lowlatency-hwe-5.15Upgrade linux-ibmUpgrade linux-gkeUpgrade linux-awsUpgrade linux-riscv-5.15Upgrade linux-nvidia-tegra-5.15Upgrade linux-azure-5.15Upgrade linux-gkeopUpgrade linux-oracle-5.15Upgrade linux-gcpUpgrade linuxUpgrade linux-intel-iot-realtime | Oct 10, 2025 | Oct 4, 2025 |
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