Log in Start free

Vulnerability · Published Nov 12, 2025 · Assigned by Linux

CVE-2025-40139smc: Use __sk_dst_get() and dst_dev_rcu() in in smc_clc_prfx_set().

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 6% 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 94.2% 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: smc: Use __sk_dst_get() and dst_dev_rcu() in in smc_clc_prfx_set(). smc_clc_prfx_set() is called during connect() and not under RCU nor RTNL. Using sk_dst_get(sk)->dev could trigger UAF. Let's use __sk_dst_get() and dev_dst_rcu() under rcu_read_lock() after kernel_getsockname(). Note that the returned value of smc_clc_prfx_set() is not used in the caller. While at it, we change the 1st arg of smc_clc_prfx_set[46]_rcu() not to touch dst there.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.187-1DEBIAN-CVE-2025-40139
Debian:13linux6.12.111-1DEBIAN-CVE-2025-40139
Debian:14linux6.17.6-1DEBIAN-CVE-2025-40139
Debian:12linux-6.126.12.111-1~deb12u1DEBIAN-CVE-2025-40139
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2025-40139
Ubuntu:25.10linux6.17.0-14.14UBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2025-40139
Ubuntu:25.10linux-aws6.17.0-1007.7UBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-aws-6.176.17.0-1007.7~24.04.1UBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2025-40139
Ubuntu:25.10linux-azure6.17.0-1008.8UBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2025-40139
Ubuntu:25.10linux-azure-fdeno fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2025-40139
Ubuntu:25.10linux-gcp6.17.0-1007.7UBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-gcp-6.176.17.0-1008.8~24.04.1UBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-nvidia-6.176.17.0-1008.8UBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1035.38UBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-nvidia-tegra-igxno fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-oem-6.176.17.0-1011.11UBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2025-40139
Ubuntu:25.10linux-oracle6.17.0-1007.7UBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-oracle-6.176.17.0-1007.7~24.04.1UBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2025-40139
Ubuntu:25.10linux-raspi6.17.0-1008.8UBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2025-40139
Ubuntu:25.10linux-realtime6.17.0-1006.7UBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2025-40139
Ubuntu:25.10linux-riscv6.17.0-14.14.1UBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-vmwareno fix listedUBUNTU-CVE-2025-40139
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2025-40139
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2025-40139

Affected products (as reported)

VendorProductVersions
Linux Linux a046d57da19f812216f393e7c535f5858f793ac3 – before 5a2fccc4b32c13ddde3676f9e15e1a9baa7d6fdea046d57da19f812216f393e7c535f5858f793ac3 – before 80d1fd39f4e37d836655e9f7ffccaf78925049bfa046d57da19f812216f393e7c535f5858f793ac3 – before 956c57daba55cf9ed25d9f2512883b8a1a927599a046d57da19f812216f393e7c535f5858f793ac3 – before 0736993bfe5c7a9c744ae3fac62d769dfdae54e1a046d57da19f812216f393e7c535f5858f793ac3 – before 935d783e5de9b64587f3adb25641dd8385e64ddb
Linux Linux 4.11

References