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Vulnerability · Published Nov 12, 2025 · Assigned by Linux

CVE-2025-40203listmount: don't call path_put() under namespace semaphore

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 0.2% (higher than 4% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.2%top 95.7% 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: listmount: don't call path_put() under namespace semaphore Massage listmount() and make sure we don't call path_put() under the namespace semaphore. If we put the last reference we're fscked.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:13linux6.12.57-1DEBIAN-CVE-2025-40203
Debian:14linux6.17.6-1DEBIAN-CVE-2025-40203
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2025-40203
Ubuntu:25.10linux6.17.0-14.14UBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2025-40203
Ubuntu:25.10linux-aws6.17.0-1007.7UBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-aws-6.176.17.0-1007.7~24.04.1UBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2025-40203
Ubuntu:25.10linux-azure6.17.0-1008.8UBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2025-40203
Ubuntu:25.10linux-azure-fdeno fix listedUBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2025-40203
Ubuntu:25.10linux-gcp6.17.0-1007.7UBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-gcp-6.176.17.0-1008.8~24.04.1UBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-nvidia-6.176.17.0-1008.8UBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1035.38UBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-oem-6.176.17.0-1011.11UBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2025-40203
Ubuntu:25.10linux-oracle6.17.0-1007.7UBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-oracle-6.176.17.0-1007.7~24.04.1UBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2025-40203
Ubuntu:25.10linux-raspi6.17.0-1008.8UBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-40203
Ubuntu:25.10linux-realtime6.17.0-1006.7UBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-40203
Ubuntu:25.10linux-riscv6.17.0-14.14.1UBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2025-40203
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-vmwareno fix listedUBUNTU-CVE-2025-40203
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2025-40203

Affected products (as reported)

VendorProductVersions
Linux Linux b4c2bea8ceaa50cd42a8f73667389d801a3ecf2d – before 659874b7ee4976ad9ce476e07fd36bc67b3537f1b4c2bea8ceaa50cd42a8f73667389d801a3ecf2d – before 9c80da26fda2fdcaac7f92b5908875b3108830ffb4c2bea8ceaa50cd42a8f73667389d801a3ecf2d – before c1f86d0ac322c7e77f6f8dbd216c65d39358ffc0
Linux Linux 6.8

References