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Vulnerability · Published Oct 23, 2026 · Assigned by Linux

CVE-2026-99070ipv6: do not warn on route notification size race

Unrated

In plain English

A 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 0.2% (higher than 7% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS )–Not rated
Exploit odds (30 days)0.2%top 93.2% 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: ipv6: do not warn on route notification size race fib6_info_hw_flags_set() sizes the skb with rt6_nlmsg_size() and later fills it with rt6_fill_node(). With nexthop compatibility mode enabled, a concurrent replacement can grow the group between these independent snapshots. rt6_fill_node() can then legitimately return -EMSGSIZE, so the warning does not prove a sizing bug. Remove the warning. The existing error path still frees the skb and reports the error to listeners.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linuxno fix listedDEBIAN-CVE-2026-99070
Debian:13linux6.12.113-1DEBIAN-CVE-2026-99070
Debian:14linux7.2.11-1DEBIAN-CVE-2026-99070
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2026-99070
Ubuntu:26.04:LTSlinuxno fix listedUBUNTU-CVE-2026-99070
Ubuntu:26.10linux7.3.0-10.10UBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-99070
Ubuntu:26.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-99070
Ubuntu:26.10linux-aws7.3.0-1004.4UBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-aws-7.0no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-99070
Ubuntu:26.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-99070
Ubuntu:26.10linux-azureno fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-azure-7.0no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-99070
Ubuntu:26.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-99070
Ubuntu:26.10linux-azure-fdeno fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-azure-fde-7.0no fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-99070
Ubuntu:26.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-99070
Ubuntu:26.10linux-gcp7.3.0-1004.4UBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-gcp-7.0no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-99070
Ubuntu:26.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-hwe-7.0no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-99070
Ubuntu:26.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-99070
Ubuntu:26.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-nvidia-7.0no fix listedUBUNTU-CVE-2026-99070
Ubuntu:26.04:LTSlinux-nvidia-bosno fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-nvidia-tegra-igxno fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-99070
Ubuntu:26.04:LTSlinux-oem-7.0no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-99070
Ubuntu:26.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-99070
Ubuntu:26.10linux-oracle7.3.0-1004.4UBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-oracle-7.0no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-99070
Ubuntu:26.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-99070
Ubuntu:26.10linux-raspi7.3.0-1004.4UBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-99070
Ubuntu:26.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-99070
Ubuntu:26.10linux-realtime7.3.0-10.10.1UBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-99070
Ubuntu:26.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-99070
Ubuntu:26.10linux-riscv7.3.0-10.10.1UBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-riscv-7.0no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-vmwareno fix listedUBUNTU-CVE-2026-99070
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2026-99070
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2026-99070

Affected products (as reported)

VendorProductVersions
Linux Linux 907eea486888cfe118c19759bbc4b8fca2e004df – before dac2b0328495971c7b417fd0143e53643343936e907eea486888cfe118c19759bbc4b8fca2e004df – before 24b2c95a046e15c9504a6d672b6b0b252952493f907eea486888cfe118c19759bbc4b8fca2e004df – before 8a3b935b6b6037eefb36bd27a60793a008358e8d907eea486888cfe118c19759bbc4b8fca2e004df – before 7b112bd43f1172fb152e848570a957467008a5ae907eea486888cfe118c19759bbc4b8fca2e004df – before 4ac7d92a4698e34e614c254359665b9de1f65283907eea486888cfe118c19759bbc4b8fca2e004df – before 291fe0bafee78c95f9f2e7f579f17793fd5a1e5a907eea486888cfe118c19759bbc4b8fca2e004df – before c97426ec649d99596d8969e1a052c16b14b7b485
Linux Linux 5.12

References