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Vulnerability · Published May 8, 2026 · Assigned by Linux

CVE-2026-43454netfilter: nf_tables: Fix for duplicate device in netdev hooks

High 7.8

In plain English

A high-severity security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.1%top 98.2% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: Fix for duplicate device in netdev hooks When handling NETDEV_REGISTER notification, duplicate device registration must be avoided since the device may have been added by nft_netdev_hook_alloc() already when creating the hook.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:10kernel6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-64k6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-64k-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-64k-debug6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-64k-debug-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-64k-debug-devel6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-64k-debug-devel-matched6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-64k-debug-modules6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-64k-debug-modules-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-64k-debug-modules-extra6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-64k-devel6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-64k-devel-matched6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-64k-modules6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-64k-modules-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-64k-modules-extra6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-abi-stablelists6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-cross-headers6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-debug6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-debug-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-debug-devel6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-debug-devel-matched6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-debug-modules6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-debug-modules-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-debug-modules-extra6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-debug-uki-virt6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-devel6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-devel-matched6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-doc6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-headers6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-modules6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-modules-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-modules-extra6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-modules-extra-matched6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-rt6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-rt-64k6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-rt-64k-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-rt-64k-debug6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-rt-64k-debug-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-rt-64k-debug-devel6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-rt-64k-debug-modules6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-rt-64k-debug-modules-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-rt-64k-debug-modules-extra6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-rt-64k-devel6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-rt-64k-modules6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-rt-64k-modules-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-rt-64k-modules-extra6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-rt-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-rt-debug6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-rt-debug-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-rt-debug-devel6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-rt-debug-modules6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-rt-debug-modules-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-rt-debug-modules-extra6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-rt-devel6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-rt-modules6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-rt-modules-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-rt-modules-extra6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-tools6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-tools-libs6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-tools-libs-devel6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-uki-virt6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-uki-virt-addons6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-zfcpdump6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-zfcpdump-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-zfcpdump-devel6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-zfcpdump-devel-matched6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-zfcpdump-modules6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-zfcpdump-modules-core6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10kernel-zfcpdump-modules-extra6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10libperf6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10perf6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10python3-perf6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10rtla6.12.0-211.50.1.el10_2ALSA-2026:61887
AlmaLinux:10rv6.12.0-211.50.1.el10_2ALSA-2026:61887
Debian:14linux6.19.10-1DEBIAN-CVE-2026-43454
Rocky Linux:10kernel0:6.12.0-211.50.1.el10_2RLSA-2026:61887
Ubuntu:25.10linuxno fix listedUBUNTU-CVE-2026-43454
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-43454
Ubuntu:25.10linux-awsno fix listedUBUNTU-CVE-2026-43454
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-43454
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-43454
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-43454
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-43454
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-43454
Ubuntu:25.10linux-azureno fix listedUBUNTU-CVE-2026-43454
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-43454
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-43454
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-43454
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-43454
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-43454
Ubuntu:25.10linux-azure-fdeno fix listedUBUNTU-CVE-2026-43454
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-43454
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-43454
Ubuntu:25.10linux-gcpno fix listedUBUNTU-CVE-2026-43454
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-43454
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-43454
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-43454
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-43454
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-43454
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-43454
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-43454
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-43454
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-43454
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-43454
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-43454
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-43454
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-43454
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-43454
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-43454
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-43454
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-43454
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-43454
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-43454
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-43454
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-43454
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-43454
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-43454
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-43454
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-43454
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-43454
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-43454
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-43454
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-43454
Ubuntu:25.10linux-oracleno fix listedUBUNTU-CVE-2026-43454
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-43454
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-43454
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-43454
Ubuntu:25.10linux-raspino fix listedUBUNTU-CVE-2026-43454
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-43454
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-43454
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-43454
Ubuntu:25.10linux-realtimeno fix listedUBUNTU-CVE-2026-43454
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-43454
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-43454
Ubuntu:25.10linux-riscvno fix listedUBUNTU-CVE-2026-43454
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-43454
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-43454
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-43454
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-43454
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-43454
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-43454
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-43454

Affected products (as reported)

VendorProductVersions
Linux Linux a331b78a552551d0e404e58e6390b1c828d6af8f – before 6d2a95c6890577cc3eab2b20018e16850d7fb094a331b78a552551d0e404e58e6390b1c828d6af8f – before 2041cdb078041611510fc189410bc70b29f688fba331b78a552551d0e404e58e6390b1c828d6af8f – before b7cdc5a97d02c943f4bdde4d5767ad0c13cad92b
Linux Linux 6.16

References