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Vulnerability · Published Aug 15, 2026 · Assigned by Linux

CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()

Critical 10.0

In plain English

A critical-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 0.5% (higher than 40% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)10.0Critical
Exploit odds (30 days)0.5%top 60.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: vxlan: use neigh_ha_snapshot() in route_shortcircuit() The neighbour hardware address n->ha can be updated asynchronously by the neighbour subsystem, protected by n->ha_lock seqlock. Reading n->ha without holding the seqlock loop can lead to torn reads or reading a partially updated MAC address. Use neigh_ha_snapshot() in route_shortcircuit() to safely copy n->ha under read_seqbegin()/read_seqretry() lock protection before using it. Note that arp_reduce() and neigh_reduce() seem to have the same issue left for future patches.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.187-1DEBIAN-CVE-2026-74475
Debian:13linux6.12.105-1DEBIAN-CVE-2026-74475
Debian:14linux7.1.8-1DEBIAN-CVE-2026-74475
Debian:12linux-6.126.12.107-1~deb12u1DEBIAN-CVE-2026-74475
Ubuntu:22.04:LTSlinux5.15.0-198.208UBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2026-74475
Ubuntu:26.04:LTSlinux7.0.0-42.42UBUNTU-CVE-2026-74475
Ubuntu:26.04:LTSlinux7.0.0-42.42USN-8959-1
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-aws5.15.0-1117.124UBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-74475
Ubuntu:26.04:LTSlinux-aws7.0.0-1016.17USN-8959-1
Ubuntu:26.04:LTSlinux-aws7.0.0-1016.17UBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-aws-7.0no fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-azure5.15.0-1123.132UBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-74475
Ubuntu:26.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-azure-7.0no fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1122.131UBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-74475
Ubuntu:26.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-azure-fde-7.0no fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-gcp5.15.0-1118.128UBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-74475
Ubuntu:26.04:LTSlinux-gcp7.0.0-1016.18USN-8959-1
Ubuntu:26.04:LTSlinux-gcp7.0.0-1016.18UBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-gcp-7.0no fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-gke5.15.0-1113.119UBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-74475
Ubuntu:26.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1100.108UBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-hwe-7.07.0.0-42.42~24.04.1USN-8959-1
Ubuntu:24.04:LTSlinux-hwe-7.07.0.0-42.42~24.04.1UBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-ibm5.15.0-1111.115UBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-74475
Ubuntu:26.04:LTSlinux-ibm7.0.0-1017.17USN-8959-1
Ubuntu:26.04:LTSlinux-ibm7.0.0-1017.17UBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1112.118UBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-kvm5.15.0-1109.114UBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-195.205UBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1112.113UBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-74475
Ubuntu:26.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-nvidia-7.0no fix listedUBUNTU-CVE-2026-74475
Ubuntu:26.04:LTSlinux-nvidia-bosno fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1070.72UBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1035.38UBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1059.59UBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-74475
Ubuntu:26.04:LTSlinux-oem-7.07.0.0-1017.17UBUNTU-CVE-2026-74475
Ubuntu:26.04:LTSlinux-oem-7.07.0.0-1017.17USN-8960-1
Ubuntu:22.04:LTSlinux-oracle5.15.0-1114.120UBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-74475
Ubuntu:26.04:LTSlinux-oracle7.0.0-1015.16USN-8959-1
Ubuntu:26.04:LTSlinux-oracle7.0.0-1015.16UBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-oracle-7.0no fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-74475
Ubuntu:26.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-74475
Ubuntu:26.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-74475
Ubuntu:26.04:LTSlinux-riscv7.0.0-42.42.1UBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-riscv-7.07.0.0-42.42.1~24.04.1UBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-vmwareno fix listedUBUNTU-CVE-2026-74475
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2026-74475
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1080.84UBUNTU-CVE-2026-74475

Affected products (as reported)

VendorProductVersions
Linux Linux e4f67addf158f98f8197e08974966b18480dc751 – before 32a9590a8d30426e3db63e6b20893e47e02576c0e4f67addf158f98f8197e08974966b18480dc751 – before d0993fc053f29e15cc7c9fe2029df3882a2ab5abe4f67addf158f98f8197e08974966b18480dc751 – before 87210054bad82bbae6f483a742dc45722fb47a6be4f67addf158f98f8197e08974966b18480dc751 – before d08e8ac13f2e228cc7fc3c70b5ebe71557b624a0e4f67addf158f98f8197e08974966b18480dc751 – before ec341bb76d77b4c2948764375ee6bfeef4bb41c3e4f67addf158f98f8197e08974966b18480dc751 – before ff89415d34c3ab9f5312316423122e664ed3524fe4f67addf158f98f8197e08974966b18480dc751 – before 05f2987f73daa05333fd713d05546142f9f7c5f0e4f67addf158f98f8197e08974966b18480dc751 – before 8eca411347e1d38964f9ed2c8d3b6ab0e7e4473d
Linux Linux 3.8

References