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Vulnerability · Published Sep 11, 2026 · Assigned by Linux

CVE-2026-80996net: l2tp: do not propagate multicast notification errors

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 11% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS )–Not rated
Exploit odds (30 days)0.2%top 89.3% 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: net: l2tp: do not propagate multicast notification errors The tunnel create, tunnel modify, session create, and session modify netlink handlers send multicast notifications through helpers that can fail while allocating or encoding a message, or while multicasting it. For tunnel and session create/modify, a notification is sent after the live operation has completed. Returning a best-effort notification error as the command result can therefore report failure for an operation that already committed and can cause callers to retry and accumulate live objects. Keep sending notifications for listener visibility, but do not propagate their best-effort status as the command result. This also keeps the tunnel modify command consistent with the other notification-only paths.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linuxno fix listedDEBIAN-CVE-2026-80996
Debian:13linux6.12.111-1DEBIAN-CVE-2026-80996
Debian:14linux7.2.6-1DEBIAN-CVE-2026-80996
Debian:12linux-6.126.12.111-1~deb12u1DEBIAN-CVE-2026-80996
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2026-80996
Ubuntu:26.04:LTSlinux7.0.0-42.42UBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-80996
Ubuntu:26.04:LTSlinux-aws7.0.0-1016.17UBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-aws-7.0no fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-80996
Ubuntu:26.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-azure-7.0no fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-80996
Ubuntu:26.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-azure-fde-7.0no fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-80996
Ubuntu:26.04:LTSlinux-gcp7.0.0-1016.18UBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-gcp-7.0no fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-80996
Ubuntu:26.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-hwe-7.07.0.0-42.42~24.04.1UBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-80996
Ubuntu:26.04:LTSlinux-ibm7.0.0-1017.17UBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-80996
Ubuntu:26.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-nvidia-7.0no fix listedUBUNTU-CVE-2026-80996
Ubuntu:26.04:LTSlinux-nvidia-bosno fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-nvidia-tegra-igxno fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-80996
Ubuntu:26.04:LTSlinux-oem-7.07.0.0-1017.17UBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-80996
Ubuntu:26.04:LTSlinux-oracle7.0.0-1015.16UBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-oracle-7.0no fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-80996
Ubuntu:26.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-80996
Ubuntu:26.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-80996
Ubuntu:26.04:LTSlinux-riscv7.0.0-42.42.1UBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-riscv-7.07.0.0-42.42.1~24.04.1UBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-vmwareno fix listedUBUNTU-CVE-2026-80996
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2026-80996
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2026-80996

Affected products (as reported)

VendorProductVersions
Linux Linux 33f72e6f0c67f673fd0c63a8182dbd9ffb8cf50b – before 73761c3cfb6d86392d63335d10f464b9d43275a733f72e6f0c67f673fd0c63a8182dbd9ffb8cf50b – before 7efe1c31e0903a5aa796feb96d3adab574b7ff4133f72e6f0c67f673fd0c63a8182dbd9ffb8cf50b – before 0fe037d5eaad938aa3e9143ee071aa237750b42b33f72e6f0c67f673fd0c63a8182dbd9ffb8cf50b – before 9c340473f4822bb31b151c19afd17448eda5acd133f72e6f0c67f673fd0c63a8182dbd9ffb8cf50b – before 50c4038f1670bf9a80c6a58ae83d1602decd848133f72e6f0c67f673fd0c63a8182dbd9ffb8cf50b – before af20e269f7459d2ce69887fdf2fad7caf986c865
Linux Linux 4.0

References