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Vulnerability · Published Nov 12, 2025 · Assigned by Linux

CVE-2025-40168smc: Use __sk_dst_get() and dst_dev_rcu() in smc_clc_prfx_match().

High 8.1

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 0.4% (higher than 37% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.1High
Exploit odds (30 days)0.4%top 63.5% 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 smc_clc_prfx_match(). smc_clc_prfx_match() is called from smc_listen_work() and not under RCU nor RTNL. Using sk_dst_get(sk)->dev could trigger UAF. Let's use __sk_dst_get() and dst_dev_rcu(). Note that the returned value of smc_clc_prfx_match() is not used in the caller.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8bpftool4.18.0-553.105.1.el8_10ALSA-2026:2720
AlmaLinux:8kernel4.18.0-553.105.1.el8_10ALSA-2026:2720
AlmaLinux:9kernel5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9kernel-64k5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9kernel-64k-core5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9kernel-64k-debug5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9kernel-64k-debug-core5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9kernel-64k-debug-devel5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9kernel-64k-debug-devel-matched5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9kernel-64k-debug-modules5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9kernel-64k-debug-modules-core5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9kernel-64k-debug-modules-extra5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9kernel-64k-devel5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9kernel-64k-devel-matched5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9kernel-64k-modules5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9kernel-64k-modules-core5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9kernel-64k-modules-extra5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:10kernel-abi-stablelists6.12.0-124.39.1.el10_1ALSA-2026:3275
AlmaLinux:8kernel-abi-stablelists4.18.0-553.105.1.el8_10ALSA-2026:2720
AlmaLinux:9kernel-abi-stablelists5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:8kernel-core4.18.0-553.105.1.el8_10ALSA-2026:2720
AlmaLinux:9kernel-core5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:8kernel-cross-headers4.18.0-553.105.1.el8_10ALSA-2026:2720
AlmaLinux:9kernel-cross-headers5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:8kernel-debug4.18.0-553.105.1.el8_10ALSA-2026:2720
AlmaLinux:9kernel-debug5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:8kernel-debug-core4.18.0-553.105.1.el8_10ALSA-2026:2720
AlmaLinux:9kernel-debug-core5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:8kernel-debug-devel4.18.0-553.105.1.el8_10ALSA-2026:2720
AlmaLinux:9kernel-debug-devel5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9kernel-debug-devel-matched5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:8kernel-debug-modules4.18.0-553.105.1.el8_10ALSA-2026:2720
AlmaLinux:9kernel-debug-modules5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9kernel-debug-modules-core5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:8kernel-debug-modules-extra4.18.0-553.105.1.el8_10ALSA-2026:2720
AlmaLinux:9kernel-debug-modules-extra5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9kernel-debug-uki-virt5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:8kernel-devel4.18.0-553.105.1.el8_10ALSA-2026:2720
AlmaLinux:9kernel-devel5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9kernel-devel-matched5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:10kernel-doc6.12.0-124.39.1.el10_1ALSA-2026:3275
AlmaLinux:8kernel-doc4.18.0-553.105.1.el8_10ALSA-2026:2720
AlmaLinux:9kernel-doc5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:8kernel-headers4.18.0-553.105.1.el8_10ALSA-2026:2720
AlmaLinux:9kernel-headers5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:8kernel-modules4.18.0-553.105.1.el8_10ALSA-2026:2720
AlmaLinux:9kernel-modules5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9kernel-modules-core5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:8kernel-modules-extra4.18.0-553.105.1.el8_10ALSA-2026:2720
AlmaLinux:9kernel-modules-extra5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:8kernel-rt4.18.0-553.105.1.rt7.446.el8_10ALSA-2026:2821
AlmaLinux:9kernel-rt5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9kernel-rt-64k5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9kernel-rt-64k-core5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9kernel-rt-64k-debug5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9kernel-rt-64k-debug-core5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9kernel-rt-64k-debug-devel5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9kernel-rt-64k-debug-modules5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9kernel-rt-64k-debug-modules-core5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9kernel-rt-64k-debug-modules-extra5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9kernel-rt-64k-devel5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9kernel-rt-64k-modules5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9kernel-rt-64k-modules-core5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9kernel-rt-64k-modules-extra5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:8kernel-rt-core4.18.0-553.105.1.rt7.446.el8_10ALSA-2026:2821
AlmaLinux:9kernel-rt-core5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:8kernel-rt-debug4.18.0-553.105.1.rt7.446.el8_10ALSA-2026:2821
AlmaLinux:9kernel-rt-debug5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:8kernel-rt-debug-core4.18.0-553.105.1.rt7.446.el8_10ALSA-2026:2821
AlmaLinux:9kernel-rt-debug-core5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:8kernel-rt-debug-devel4.18.0-553.105.1.rt7.446.el8_10ALSA-2026:2821
AlmaLinux:9kernel-rt-debug-devel5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:8kernel-rt-debug-modules4.18.0-553.105.1.rt7.446.el8_10ALSA-2026:2821
AlmaLinux:9kernel-rt-debug-modules5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9kernel-rt-debug-modules-core5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:8kernel-rt-debug-modules-extra4.18.0-553.105.1.rt7.446.el8_10ALSA-2026:2821
AlmaLinux:9kernel-rt-debug-modules-extra5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:8kernel-rt-devel4.18.0-553.105.1.rt7.446.el8_10ALSA-2026:2821
AlmaLinux:9kernel-rt-devel5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:8kernel-rt-modules4.18.0-553.105.1.rt7.446.el8_10ALSA-2026:2821
AlmaLinux:9kernel-rt-modules5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9kernel-rt-modules-core5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:8kernel-rt-modules-extra4.18.0-553.105.1.rt7.446.el8_10ALSA-2026:2821
AlmaLinux:9kernel-rt-modules-extra5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:8kernel-tools4.18.0-553.105.1.el8_10ALSA-2026:2720
AlmaLinux:9kernel-tools5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:8kernel-tools-libs4.18.0-553.105.1.el8_10ALSA-2026:2720
AlmaLinux:9kernel-tools-libs5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:8kernel-tools-libs-devel4.18.0-553.105.1.el8_10ALSA-2026:2720
AlmaLinux:9kernel-tools-libs-devel5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9kernel-uki-virt5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9kernel-uki-virt-addons5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:8kernel-zfcpdump4.18.0-553.105.1.el8_10ALSA-2026:2720
AlmaLinux:9kernel-zfcpdump5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:8kernel-zfcpdump-core4.18.0-553.105.1.el8_10ALSA-2026:2720
AlmaLinux:9kernel-zfcpdump-core5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:8kernel-zfcpdump-devel4.18.0-553.105.1.el8_10ALSA-2026:2720
AlmaLinux:9kernel-zfcpdump-devel5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9kernel-zfcpdump-devel-matched5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:8kernel-zfcpdump-modules4.18.0-553.105.1.el8_10ALSA-2026:2720
AlmaLinux:9kernel-zfcpdump-modules5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9kernel-zfcpdump-modules-core5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:8kernel-zfcpdump-modules-extra4.18.0-553.105.1.el8_10ALSA-2026:2720
AlmaLinux:9kernel-zfcpdump-modules-extra5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9libperf5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:8perf4.18.0-553.105.1.el8_10ALSA-2026:2720
AlmaLinux:9perf5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:8python3-perf4.18.0-553.105.1.el8_10ALSA-2026:2720
AlmaLinux:9python3-perf5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9rtla5.14.0-611.36.1.el9_7ALSA-2026:3488
AlmaLinux:9rv5.14.0-611.36.1.el9_7ALSA-2026:3488
Debian:12linux6.1.187-1DEBIAN-CVE-2025-40168
Debian:13linux6.12.111-1DEBIAN-CVE-2025-40168
Debian:14linux6.17.6-1DEBIAN-CVE-2025-40168
Debian:12linux-6.126.12.111-1~deb12u1DEBIAN-CVE-2025-40168
Rocky Linux:8kernel0:4.18.0-553.105.1.el8_10RLSA-2026:2720
Rocky Linux:9kernel0:5.14.0-611.36.1.el9_7RLSA-2026:3488
Rocky Linux:8kernel-rt0:4.18.0-553.105.1.rt7.446.el8_10RLSA-2026:2821
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2025-40168
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2025-40168
Ubuntu:25.10linux6.17.0-14.14UBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2025-40168
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2025-40168
Ubuntu:25.10linux-aws6.17.0-1007.7UBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2025-40168
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2025-40168
Ubuntu:24.04:LTSlinux-aws-6.176.17.0-1007.7~24.04.1UBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2025-40168
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2025-40168
Ubuntu:25.10linux-azure6.17.0-1008.8UBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2025-40168
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2025-40168
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2025-40168
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2025-40168
Ubuntu:25.10linux-azure-fdeno fix listedUBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2025-40168
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2025-40168
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2025-40168
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2025-40168
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2025-40168
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2025-40168
Ubuntu:25.10linux-gcp6.17.0-1007.7UBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2025-40168
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2025-40168
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2025-40168
Ubuntu:24.04:LTSlinux-gcp-6.176.17.0-1008.8~24.04.1UBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2025-40168
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2025-40168
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2025-40168
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2025-40168
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2025-40168
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2025-40168
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2025-40168
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2025-40168
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2025-40168
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2025-40168
Ubuntu:24.04:LTSlinux-nvidia-6.176.17.0-1008.8UBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2025-40168
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2025-40168
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1035.38UBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-nvidia-tegra-igxno fix listedUBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2025-40168
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2025-40168
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2025-40168
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2025-40168
Ubuntu:24.04:LTSlinux-oem-6.176.17.0-1011.11UBUNTU-CVE-2025-40168

Affected products (as reported)

VendorProductVersions
Linux Linux a046d57da19f812216f393e7c535f5858f793ac3 – before 3f119c37aa293af41400cccb3d89fab8dcf774b0a046d57da19f812216f393e7c535f5858f793ac3 – before 4f5f52a5842937f945582a93cb9daed9ea526feea046d57da19f812216f393e7c535f5858f793ac3 – before 326e5cf301d0bec0a672aa834d8254c4f9df6255a046d57da19f812216f393e7c535f5858f793ac3 – before d26e80f7fb62d77757b67a1b94e4ac756bc9c658a046d57da19f812216f393e7c535f5858f793ac3 – before 235f81045c008169cc4e1955b4a64e118eebe61b
Linux Linux 4.11

References