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