Vulnerability · Published Nov 12, 2025 · Assigned by Linux

CVE-2025-40135ipv6: use RCU in ip6_xmit()

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 0.7% (higher than 54% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.1High
Exploit odds (30 days)0.7%top 46.3% 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: ipv6: use RCU in ip6_xmit() Use RCU in ip6_xmit() in order to use dst_dev_rcu() to prevent possible UAF.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8bpftool4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:8kernel4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:9kernel5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9kernel-64k5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9kernel-64k-core5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9kernel-64k-debug5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9kernel-64k-debug-core5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9kernel-64k-debug-devel5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9kernel-64k-debug-devel-matched5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9kernel-64k-debug-modules5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9kernel-64k-debug-modules-core5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9kernel-64k-debug-modules-extra5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9kernel-64k-devel5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9kernel-64k-devel-matched5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9kernel-64k-modules5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9kernel-64k-modules-core5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9kernel-64k-modules-extra5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:10kernel-abi-stablelists6.12.0-124.31.1.el10_1ALSA-2026:1690
AlmaLinux:8kernel-abi-stablelists4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:9kernel-abi-stablelists5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:8kernel-core4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:9kernel-core5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:8kernel-cross-headers4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:9kernel-cross-headers5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:8kernel-debug4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:9kernel-debug5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:8kernel-debug-core4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:9kernel-debug-core5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:8kernel-debug-devel4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:9kernel-debug-devel5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9kernel-debug-devel-matched5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:8kernel-debug-modules4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:9kernel-debug-modules5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9kernel-debug-modules-core5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:8kernel-debug-modules-extra4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:9kernel-debug-modules-extra5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9kernel-debug-uki-virt5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:8kernel-devel4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:9kernel-devel5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9kernel-devel-matched5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:10kernel-doc6.12.0-124.31.1.el10_1ALSA-2026:1690
AlmaLinux:8kernel-doc4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:9kernel-doc5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:8kernel-headers4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:9kernel-headers5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:8kernel-modules4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:9kernel-modules5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9kernel-modules-core5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:8kernel-modules-extra4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:9kernel-modules-extra5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:8kernel-rt4.18.0-553.104.1.rt7.445.el8_10ALSA-2026:2378
AlmaLinux:9kernel-rt5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9kernel-rt-64k5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9kernel-rt-64k-core5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9kernel-rt-64k-debug5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9kernel-rt-64k-debug-core5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9kernel-rt-64k-debug-devel5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9kernel-rt-64k-debug-modules5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9kernel-rt-64k-debug-modules-core5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9kernel-rt-64k-debug-modules-extra5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9kernel-rt-64k-devel5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9kernel-rt-64k-modules5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9kernel-rt-64k-modules-core5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9kernel-rt-64k-modules-extra5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:8kernel-rt-core4.18.0-553.104.1.rt7.445.el8_10ALSA-2026:2378
AlmaLinux:9kernel-rt-core5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:8kernel-rt-debug4.18.0-553.104.1.rt7.445.el8_10ALSA-2026:2378
AlmaLinux:9kernel-rt-debug5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:8kernel-rt-debug-core4.18.0-553.104.1.rt7.445.el8_10ALSA-2026:2378
AlmaLinux:9kernel-rt-debug-core5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:8kernel-rt-debug-devel4.18.0-553.104.1.rt7.445.el8_10ALSA-2026:2378
AlmaLinux:9kernel-rt-debug-devel5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:8kernel-rt-debug-modules4.18.0-553.104.1.rt7.445.el8_10ALSA-2026:2378
AlmaLinux:9kernel-rt-debug-modules5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9kernel-rt-debug-modules-core5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:8kernel-rt-debug-modules-extra4.18.0-553.104.1.rt7.445.el8_10ALSA-2026:2378
AlmaLinux:9kernel-rt-debug-modules-extra5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:8kernel-rt-devel4.18.0-553.104.1.rt7.445.el8_10ALSA-2026:2378
AlmaLinux:9kernel-rt-devel5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:8kernel-rt-modules4.18.0-553.104.1.rt7.445.el8_10ALSA-2026:2378
AlmaLinux:9kernel-rt-modules5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9kernel-rt-modules-core5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:8kernel-rt-modules-extra4.18.0-553.104.1.rt7.445.el8_10ALSA-2026:2378
AlmaLinux:9kernel-rt-modules-extra5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:8kernel-tools4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:9kernel-tools5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:8kernel-tools-libs4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:9kernel-tools-libs5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:8kernel-tools-libs-devel4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:9kernel-tools-libs-devel5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9kernel-uki-virt5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9kernel-uki-virt-addons5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:8kernel-zfcpdump4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:9kernel-zfcpdump5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:8kernel-zfcpdump-core4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:9kernel-zfcpdump-core5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:8kernel-zfcpdump-devel4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:9kernel-zfcpdump-devel5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9kernel-zfcpdump-devel-matched5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:8kernel-zfcpdump-modules4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:9kernel-zfcpdump-modules5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9kernel-zfcpdump-modules-core5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:8kernel-zfcpdump-modules-extra4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:9kernel-zfcpdump-modules-extra5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9libperf5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:8perf4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:9perf5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:8python3-perf4.18.0-553.104.1.el8_10ALSA-2026:2264
AlmaLinux:9python3-perf5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9rtla5.14.0-611.30.1.el9_7ALSA-2026:2212
AlmaLinux:9rv5.14.0-611.30.1.el9_7ALSA-2026:2212
Debian:12linux6.1.170-1DEBIAN-CVE-2025-40135
Debian:13linux6.12.85-1DEBIAN-CVE-2025-40135
Debian:14linux6.17.6-1DEBIAN-CVE-2025-40135
Rocky Linux:10kernel0:6.12.0-124.31.1.el10_1RLSA-2026:1690
Rocky Linux:8kernel0:4.18.0-553.104.1.el8_10RLSA-2026:2264
Rocky Linux:9kernel0:5.14.0-611.30.1.el9_7RLSA-2026:2212
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2025-40135
Ubuntu:24.04:LTSlinux6.8.0-136.136USN-8567-1
Ubuntu:24.04:LTSlinux6.8.0-136.136UBUNTU-CVE-2025-40135
Ubuntu:25.10linux6.17.0-14.14UBUNTU-CVE-2025-40135
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2025-40135
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2025-40135
Ubuntu:24.04:LTSlinux-aws6.8.0-1061.64USN-8595-2
Ubuntu:24.04:LTSlinux-aws6.8.0-1061.64UBUNTU-CVE-2025-40135
Ubuntu:25.10linux-aws6.17.0-1007.7UBUNTU-CVE-2025-40135
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2025-40135
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2025-40135
Ubuntu:24.04:LTSlinux-aws-6.176.17.0-1007.7~24.04.1UBUNTU-CVE-2025-40135
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2025-40135
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2025-40135
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1061.64~22.04.1UBUNTU-CVE-2025-40135
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1061.64~22.04.1USN-8595-3
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2025-40135
Ubuntu:24.04:LTSlinux-azure6.8.0-1063.71USN-8606-1
Ubuntu:24.04:LTSlinux-azure6.8.0-1063.71UBUNTU-CVE-2025-40135
Ubuntu:25.10linux-azure6.17.0-1008.8UBUNTU-CVE-2025-40135
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2025-40135
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2025-40135
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2025-40135
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2025-40135
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2025-40135
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1063.71~22.04.1UBUNTU-CVE-2025-40135
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1063.71~22.04.1USN-8606-1
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2025-40135
Ubuntu:24.04:LTSlinux-azure-fde6.8.0-1062.69UBUNTU-CVE-2025-40135
Ubuntu:24.04:LTSlinux-azure-fde6.8.0-1062.69USN-8607-1
Ubuntu:25.10linux-azure-fdeno fix listedUBUNTU-CVE-2025-40135
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2025-40135
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2025-40135
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2025-40135
Ubuntu:22.04:LTSlinux-azure-fde-6.86.8.0-1062.69~22.04.1UBUNTU-CVE-2025-40135
Ubuntu:22.04:LTSlinux-azure-fde-6.86.8.0-1062.69~22.04.1USN-8609-1
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2025-40135
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2025-40135
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2025-40135
Ubuntu:24.04:LTSlinux-gcp6.8.0-1064.72USN-8567-1
Ubuntu:24.04:LTSlinux-gcp6.8.0-1064.72UBUNTU-CVE-2025-40135
Ubuntu:25.10linux-gcp6.17.0-1007.7UBUNTU-CVE-2025-40135
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2025-40135
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2025-40135
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2025-40135
Ubuntu:24.04:LTSlinux-gcp-6.176.17.0-1008.8~24.04.1UBUNTU-CVE-2025-40135
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2025-40135
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2025-40135
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1064.72~22.04.1USN-8567-1
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1064.72~22.04.1UBUNTU-CVE-2025-40135
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2025-40135
Ubuntu:24.04:LTSlinux-gke6.8.0-1059.67USN-8567-1
Ubuntu:24.04:LTSlinux-gke6.8.0-1059.67UBUNTU-CVE-2025-40135
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2025-40135
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1046.50UBUNTU-CVE-2025-40135
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1046.50USN-8567-1
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2025-40135
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2025-40135
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2025-40135
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2025-40135
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2025-40135
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-136.136~22.04.1UBUNTU-CVE-2025-40135
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-136.136~22.04.1USN-8619-1
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2025-40135
Ubuntu:24.04:LTSlinux-ibm6.8.0-1061.62USN-8574-3
Ubuntu:24.04:LTSlinux-ibm6.8.0-1061.62UBUNTU-CVE-2025-40135
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1061.62~22.04.1USN-8574-3
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1061.62~22.04.1UBUNTU-CVE-2025-40135
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2025-40135
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2025-40135
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2025-40135
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2025-40135
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-136.136.2USN-8574-2
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-136.136.2UBUNTU-CVE-2025-40135
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2025-40135
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2025-40135
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2025-40135
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2025-40135
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-136.136.2~22.04.1UBUNTU-CVE-2025-40135
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-136.136.2~22.04.1USN-8574-2
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2025-40135
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1059.62UBUNTU-CVE-2025-40135
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1059.62USN-8596-1

Affected products (as reported)

VendorProductVersions
Linux Linux 4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 – before 7a228cfbb66cca49e9baf901c506364f8dfe036b4a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 – before f0a54d00d2f36de40266f47c27989853e85886564a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 – before f69fec6287565fdeb61f65e700a11843523069434a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 – before bd0905e2122e3680968cd0741966983490bf2ed34a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 – before f7f9e924f23684b4b23cd9f976cceab24a968e344a6ce2b6f2ecabbddcfe47e7cf61dd0f00b10e36 – before 9085e56501d93af9f2d7bd16f7fcfacdde47b99c
Linux Linux 4.13

References