In the Linux kernel, the following vulnerability has been resolved:
netfilter: nf_tables: double hook unregistration in netns path
__nft_release_hooks() is called from pre_netns exit path which unregisters the hooks, then the NETDEV_UNREGISTER event is triggered which unregisters the hooks again.
[ 565.221461] WARNING: CPU: 18 PID: 193 at net/netfilter/core.c:495 __nf_unregister_net_hook+0x247/0x270 [...] [ 565.246890] CPU: 18 PID: 193 Comm: kworker/u64:1 Tainted: G E 5.18.0-rc7+ #27 [ 565.253682] Workqueue: netns cleanup_net [ 565.257059] RIP: 0010:__nf_unregister_net_hook+0x247/0x270 [...] [ 565.297120] Call Trace: [ 565.300900] <TASK> [ 565.304683] nf_tables_flowtable_event+0x16a/0x220 [nf_tables] [ 565.308518] raw_notifier_call_chain+0x63/0x80 [ 565.312386] unregister_netdevice_many+0x54f/0xb50
Unregister and destroy netdev hook from netns pre_exit via kfree_rcu so the NETDEV_UNREGISTER path see unregistered hooks.
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-develUpgrade kernel-tools-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade python-perf-debuginfoUpgrade kernelUpgrade kernel-debuginfoUpgrade kernel-livepatch-5.15.50-23.125Upgrade kernel-tools-develUpgrade kernel-headersUpgrade kernel-debuginfo-common-aarch64Upgrade bpftool-debuginfoUpgrade bpftoolUpgrade kernel-livepatch-5.10.198-187.748Upgrade perf-debuginfoUpgrade python-perfUpgrade kernel-toolsUpgrade perf | May 22, 2025 | Feb 26, 2025 |
| Debian | — | Upgrade linux | Feb 27, 2025 | Feb 27, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernel-toolsUpgrade kernel-abi-stablelistsUpgrade python3-perfUpgrade kernelUpgrade kernel-tools-libsUpgrade bpftool | Oct 24, 2025 | Oct 23, 2025 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Feb 26, 2025 |
| Ubuntu | — | Upgrade linux-ibmUpgrade linux-xilinx-zynqmpUpgrade linux-riscv-5.15Upgrade linux-aws-5.4Upgrade linux-aws-fipsUpgrade linux-lowlatency-hwe-5.15Upgrade linux-realtimeUpgrade linux-bluefieldUpgrade linux-kvmUpgrade linux-gcp-5.15Upgrade linux-fipsUpgrade linux-hwe-5.4Upgrade linux-azureUpgrade linux-raspiUpgrade linux-hwe-5.15Upgrade linux-nvidiaUpgrade linux-iotUpgrade linux-azure-5.4Upgrade linux-raspi-5.4Upgrade linux-intel-iotgUpgrade linux-oracleUpgrade linux-azure-5.15Upgrade linux-oracle-5.15Upgrade linux-gkeopUpgrade linux-intel-iotg-5.15Upgrade linux-gcp-fipsUpgrade linux-ibm-5.4Upgrade linux-lowlatencyUpgrade linux-gcpUpgrade linux-azure-fipsUpgrade linuxUpgrade linux-aws-5.15Upgrade linux-awsUpgrade linux-gkeUpgrade linux-gcp-5.4Upgrade linux-oracle-5.4 | Mar 19, 2025 | Feb 26, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Feb 26, 2025 |
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