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Vulnerability · Published Oct 28, 2026 · Assigned by Linux

CVE-2026-99167net/sched: fix use-after-free in __tcf_action_put()

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 3% 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 97.3% 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/sched: fix use-after-free in __tcf_action_put() __tcf_action_put() decrements the reference count before decrementing the binding count. Another thread can free the action between these operations, causing the binding-count update to access freed memory. KASAN reports it as: BUG: KASAN: slab-use-after-free in __tcf_action_put+0x327/0x340 Write of size 4 at addr ff11000000d46420 by task tc-put-pause/64 Hold the action IDR mutex across both counter updates and IDR removal, keeping cleanup outside the lock.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linuxno fix listedDEBIAN-CVE-2026-99167
Debian:13linux6.12.115-2DEBIAN-CVE-2026-99167
Debian:14linux7.2.13-1DEBIAN-CVE-2026-99167
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2026-99167
Ubuntu:26.04:LTSlinuxno fix listedUBUNTU-CVE-2026-99167
Ubuntu:26.10linux7.3.0-10.10UBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-99167
Ubuntu:26.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-99167
Ubuntu:26.10linux-aws7.3.0-1004.4UBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-aws-7.0no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-99167
Ubuntu:26.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-99167
Ubuntu:26.10linux-azureno fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-azure-7.0no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-99167
Ubuntu:26.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-99167
Ubuntu:26.10linux-azure-fdeno fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-azure-fde-7.0no fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-99167
Ubuntu:26.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-99167
Ubuntu:26.10linux-gcp7.3.0-1004.4UBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-gcp-7.0no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-99167
Ubuntu:26.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-hwe-7.0no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-99167
Ubuntu:26.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-99167
Ubuntu:26.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-nvidia-7.0no fix listedUBUNTU-CVE-2026-99167
Ubuntu:26.04:LTSlinux-nvidia-bosno fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-nvidia-tegra-igxno fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-99167
Ubuntu:26.04:LTSlinux-oem-7.0no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-99167
Ubuntu:26.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-99167
Ubuntu:26.10linux-oracle7.3.0-1004.4UBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-oracle-7.0no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-99167
Ubuntu:26.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-99167
Ubuntu:26.10linux-raspi7.3.0-1004.4UBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-99167
Ubuntu:26.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-99167
Ubuntu:26.10linux-realtime7.3.0-10.10.1UBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-99167
Ubuntu:26.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-99167
Ubuntu:26.10linux-riscv7.3.0-10.10.1UBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-riscv-7.0no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-vmwareno fix listedUBUNTU-CVE-2026-99167
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2026-99167
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2026-99167

Affected products (as reported)

VendorProductVersions
Linux Linux 16af6067392c40e454e49eec834843ab03643d96 – before 4d83a3fc03bc595dd39b79ad61288738fbb1f2ba16af6067392c40e454e49eec834843ab03643d96 – before fd01abed2568209f7daaf60e5ee68ae4a4744f4816af6067392c40e454e49eec834843ab03643d96 – before fcc7d734ceccfab8ec3398c5b34f8e775d45950716af6067392c40e454e49eec834843ab03643d96 – before fde33eb9955d819af282d5f5e84684eaec24829116af6067392c40e454e49eec834843ab03643d96 – before 969ad6f2b266f383b44194d50d15631969b2622216af6067392c40e454e49eec834843ab03643d96 – before 2465d27ef90de9105c2bffb6c35f8ce08918e64216af6067392c40e454e49eec834843ab03643d96 – before 2e012e431aa271ef3c84206f48854f539c03bff016af6067392c40e454e49eec834843ab03643d96 – before 7b16eb911091aae237a8673da94e4dfb9cd21d54
Linux Linux 4.19

References