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Unscored CVE-2022-49558 EUVD-2022-54674GHSA-r85c-395r-g559

netfilter: nf_tables: double hook unregistration in netns path

Published Feb 26, 2025 · Updated May 23, 2026 · Assigned by Linux

Vendor: Linux Product: Linux Package: linux Package: linux Package: linux-allwinner-5.19 Package: linux-aws Package: linux-aws-5.0 Package: linux-aws-5.11 Package: linux-aws-5.13 Package: linux-aws-5.15 Package: linux-aws-5.19 Package: linux-aws-5.3 Package: linux-aws-5.4 Package: linux-aws-5.8 Package: linux-aws-6.2 Package: linux-aws-6.5 Package: linux-aws-fips Package: linux-azure Package: linux-azure-5.11 Package: linux-azure-5.13 Package: linux-azure-5.15 Package: linux-azure-5.19 Package: linux-azure-5.3 Package: linux-azure-5.4 Package: linux-azure-5.8 Package: linux-azure-6.2 Package: linux-azure-6.5 Package: linux-azure-edge Package: linux-azure-fde Package: linux-azure-fde-5.19 Package: linux-azure-fde-6.2 Package: linux-azure-fips Package: linux-bluefield Package: linux-fips Package: linux-gcp Package: linux-gcp-5.11 Package: linux-gcp-5.13 Package: linux-gcp-5.15 Package: linux-gcp-5.19 Package: linux-gcp-5.3 Package: linux-gcp-5.4 Package: linux-gcp-5.8 Package: linux-gcp-6.2 Package: linux-gcp-6.5 Package: linux-gcp-fips Package: linux-gke Package: linux-gke-4.15 Package: linux-gke-5.15 Package: linux-gke-5.4 Package: linux-gkeop Package: linux-gkeop-5.15 Package: linux-gkeop-5.4 Package: linux-hwe Package: linux-hwe-5.11 Package: linux-hwe-5.13 Package: linux-hwe-5.15 Package: linux-hwe-5.19 Package: linux-hwe-5.4 Package: linux-hwe-5.8 Package: linux-hwe-6.2 Package: linux-hwe-6.5 Package: linux-hwe-edge Package: linux-ibm Package: linux-ibm-5.4 Package: linux-intel-5.13 Package: linux-intel-iot-realtime Package: linux-intel-iotg Package: linux-intel-iotg-5.15 Package: linux-iot Package: linux-kvm Package: linux-lowlatency Package: linux-lowlatency-hwe-5.15 Package: linux-lowlatency-hwe-5.19 Package: linux-lowlatency-hwe-6.2 Package: linux-lowlatency-hwe-6.5 Package: linux-nvidia Package: linux-nvidia-6.2 Package: linux-nvidia-6.5 Package: linux-oem Package: linux-oem-5.10 Package: linux-oem-5.13 Package: linux-oem-5.14 Package: linux-oem-5.17 Package: linux-oem-5.6 Package: linux-oem-6.0 Package: linux-oem-6.1 Package: linux-oem-6.5 Package: linux-oracle Package: linux-oracle-5.0 Package: linux-oracle-5.11 Package: linux-oracle-5.13 Package: linux-oracle-5.15 Package: linux-oracle-5.3 Package: linux-oracle-5.4 Package: linux-oracle-5.8 Package: linux-oracle-6.5 Package: linux-raspi Package: linux-raspi-5.4 Package: linux-raspi-realtime Package: linux-raspi2 Package: linux-realtime Package: linux-riscv Package: linux-riscv-5.11 Package: linux-riscv-5.15 Package: linux-riscv-5.19 Package: linux-riscv-5.8 Package: linux-riscv-6.5 Package: linux-starfive-5.19 Package: linux-starfive-6.2 Package: linux-starfive-6.5 Package: linux-vmware Package: linux-xilinx-zynqmp Platform: Linux Ecosystem: Debian Ecosystem: Ubuntu

Description

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.

Affected products

VendorProductAffectedFixed
Linux Linux 5.4.99 – < 5.4.262, 5.10.17 – < 5.10.198, 5.11 5.4.262

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

Debian

Security tracker ↗
ReleasePackageFixed inAdvisory
Debian 14 linux 5.18.2-1 —
Debian 13 linux 5.18.2-1 —
Debian 12 linux 5.18.2-1 —

Ubuntu

Security tracker ↗
ReleasePackageFixed inAdvisory
Ubuntu 24.04 LTS linux-raspi-realtime No fix yet —
Ubuntu 22.04 LTS linux 5.15.0-47.51 —
Ubuntu 22.04 LTS linux-aws 5.15.0-1019.23 —
Ubuntu 22.04 LTS linux-azure 5.15.0-1019.24 —
Ubuntu 22.04 LTS linux-gcp 5.15.0-1017.23 —
Ubuntu 22.04 LTS linux-gke 5.15.0-1015.18 —
Ubuntu 22.04 LTS linux-gkeop 5.15.0-1002.4 —
Ubuntu 22.04 LTS linux-ibm 5.15.0-1013.15 —
Ubuntu 22.04 LTS linux-intel-iotg 5.15.0-1015.20 —
Ubuntu 22.04 LTS linux-kvm 5.15.0-1017.21 —
Ubuntu 22.04 LTS linux-lowlatency 5.15.0-47.53 —
Ubuntu 22.04 LTS linux-nvidia 5.15.0-1007.7 —
Ubuntu 22.04 LTS linux-oracle 5.15.0-1017.22 —
Ubuntu 22.04 LTS linux-raspi 5.15.0-1014.16 —
Ubuntu 22.04 LTS linux-riscv +32 No fix yet —
Ubuntu 20.04 LTS linux 5.4.0-173.191 —
Ubuntu 20.04 LTS linux-aws 5.4.0-1120.130 —
Ubuntu 20.04 LTS linux-aws-5.15 5.15.0-1019.23~20.04.1 —
Ubuntu 20.04 LTS linux-azure 5.4.0-1126.133 —
Ubuntu 20.04 LTS linux-azure-5.15 5.15.0-1019.24~20.04.1 —
Ubuntu 20.04 LTS linux-bluefield 5.4.0-1080.87 —
Ubuntu 20.04 LTS linux-gcp 5.4.0-1124.133 —
Ubuntu 20.04 LTS linux-gcp-5.15 5.15.0-1017.23~20.04.2 —
Ubuntu 20.04 LTS linux-gke +28 No fix yet —
Ubuntu 20.04 LTS linux-hwe-5.15 +1 5.15.0-48.54~20.04.1 —
Ubuntu 20.04 LTS linux-ibm 5.4.0-1067.72 —
Ubuntu 20.04 LTS linux-intel-iotg-5.15 5.15.0-1015.20~20.04.2 —
Ubuntu 20.04 LTS linux-iot 5.4.0-1032.33 —
Ubuntu 20.04 LTS linux-kvm 5.4.0-1108.115 —
Ubuntu 20.04 LTS linux-oracle 5.4.0-1119.128 —
Ubuntu 20.04 LTS linux-oracle-5.15 5.15.0-1017.22~20.04.1 —
Ubuntu 20.04 LTS linux-raspi 5.4.0-1104.116 —
Ubuntu 20.04 LTS linux-riscv-5.15 5.15.0-1018.21~20.04.1 —
Ubuntu 20.04 LTS linux-xilinx-zynqmp 5.4.0-1039.43 —
Ubuntu 18.04 LTS linux-gcp +14 No fix yet —
Ubuntu 16.04 LTS linux-hwe-edge No fix yet —
Show 4 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu Pro Realtime 22.04 LTS linux-realtime 5.15.0-1020.20 —
Ubuntu Pro FIPS 20.04 LTS linux-fips No fix yet —
Ubuntu Pro FIPS-updates 20.04 LTS linux-aws-fips 5.4.0-1120.130+fips1 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-azure-fips 5.4.0-1126.133+fips1 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-fips 5.4.0-1094.104 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-gcp-fips 5.4.0-1124.133+fips1 —
Ubuntu Pro 18.04 LTS linux-aws-5.4 5.4.0-1120.130~18.04.1 —
Ubuntu Pro 18.04 LTS linux-azure-5.4 5.4.0-1126.133~18.04.1 —
Ubuntu Pro 18.04 LTS linux-gcp-5.4 5.4.0-1124.133~18.04.1 —
Ubuntu Pro 18.04 LTS linux-hwe-5.4 5.4.0-173.191~18.04.1 —
Ubuntu Pro 18.04 LTS linux-ibm-5.4 5.4.0-1067.72~18.04.1 —
Ubuntu Pro 18.04 LTS linux-oracle-5.4 5.4.0-1119.128~18.04.1 —
Ubuntu Pro 18.04 LTS linux-raspi-5.4 5.4.0-1104.116~18.04.1 —

References