Vulnerability · Published Apr 30, 2026 · Assigned by Linux

CVE-2026-31692rtnetlink: add missing netlink_ns_capable() check for peer netns

Medium 5.5

In plain English

A medium-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 2% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.1%top 98.2% 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: rtnetlink: add missing netlink_ns_capable() check for peer netns rtnl_newlink() lacks a CAP_NET_ADMIN capability check on the peer network namespace when creating paired devices (veth, vxcan, netkit). This allows an unprivileged user with a user namespace to create interfaces in arbitrary network namespaces, including init_net. Add a netlink_ns_capable() check for CAP_NET_ADMIN in the peer namespace before allowing device creation to proceed.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8bpftool4.18.0-553.150.1.el8_10ALSA-2026:49214
AlmaLinux:10kernel6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:8kernel4.18.0-553.150.1.el8_10ALSA-2026:49214
AlmaLinux:9kernel5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-64k6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9kernel-64k5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-64k-core6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9kernel-64k-core5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-64k-debug6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9kernel-64k-debug5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-64k-debug-core6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9kernel-64k-debug-core5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-64k-debug-devel6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9kernel-64k-debug-devel5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-64k-debug-devel-matched6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9kernel-64k-debug-devel-matched5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-64k-debug-modules6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9kernel-64k-debug-modules5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-64k-debug-modules-core6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9kernel-64k-debug-modules-core5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-64k-debug-modules-extra6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9kernel-64k-debug-modules-extra5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-64k-devel6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9kernel-64k-devel5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-64k-devel-matched6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9kernel-64k-devel-matched5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-64k-modules6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9kernel-64k-modules5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-64k-modules-core6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9kernel-64k-modules-core5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-64k-modules-extra6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9kernel-64k-modules-extra5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-abi-stablelists6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:8kernel-abi-stablelists4.18.0-553.150.1.el8_10ALSA-2026:49214
AlmaLinux:9kernel-abi-stablelists5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-core6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:8kernel-core4.18.0-553.150.1.el8_10ALSA-2026:49214
AlmaLinux:9kernel-core5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-cross-headers6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:8kernel-cross-headers4.18.0-553.150.1.el8_10ALSA-2026:49214
AlmaLinux:9kernel-cross-headers5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-debug6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:8kernel-debug4.18.0-553.150.1.el8_10ALSA-2026:49214
AlmaLinux:9kernel-debug5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-debug-core6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:8kernel-debug-core4.18.0-553.150.1.el8_10ALSA-2026:49214
AlmaLinux:9kernel-debug-core5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-debug-devel6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:8kernel-debug-devel4.18.0-553.150.1.el8_10ALSA-2026:49214
AlmaLinux:9kernel-debug-devel5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-debug-devel-matched6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9kernel-debug-devel-matched5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-debug-modules6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:8kernel-debug-modules4.18.0-553.150.1.el8_10ALSA-2026:49214
AlmaLinux:9kernel-debug-modules5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-debug-modules-core6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9kernel-debug-modules-core5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-debug-modules-extra6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:8kernel-debug-modules-extra4.18.0-553.150.1.el8_10ALSA-2026:49214
AlmaLinux:9kernel-debug-modules-extra5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-debug-uki-virt6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9kernel-debug-uki-virt5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-devel6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:8kernel-devel4.18.0-553.150.1.el8_10ALSA-2026:49214
AlmaLinux:9kernel-devel5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-devel-matched6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9kernel-devel-matched5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-doc6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:8kernel-doc4.18.0-553.150.1.el8_10ALSA-2026:49214
AlmaLinux:9kernel-doc5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-headers6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:8kernel-headers4.18.0-553.150.1.el8_10ALSA-2026:49214
AlmaLinux:9kernel-headers5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-modules6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:8kernel-modules4.18.0-553.150.1.el8_10ALSA-2026:49214
AlmaLinux:9kernel-modules5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-modules-core6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9kernel-modules-core5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-modules-extra6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:8kernel-modules-extra4.18.0-553.150.1.el8_10ALSA-2026:49214
AlmaLinux:9kernel-modules-extra5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-modules-extra-matched6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:10kernel-rt6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:8kernel-rt4.18.0-553.150.1.rt7.491.el8_10ALSA-2026:49213
AlmaLinux:9kernel-rt5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-rt-64k6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9kernel-rt-64k5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-rt-64k-core6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9kernel-rt-64k-core5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-rt-64k-debug6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9kernel-rt-64k-debug5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-rt-64k-debug-core6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9kernel-rt-64k-debug-core5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-rt-64k-debug-devel6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9kernel-rt-64k-debug-devel5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-rt-64k-debug-modules6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9kernel-rt-64k-debug-modules5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-rt-64k-debug-modules-core6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9kernel-rt-64k-debug-modules-core5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-rt-64k-debug-modules-extra6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9kernel-rt-64k-debug-modules-extra5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-rt-64k-devel6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9kernel-rt-64k-devel5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-rt-64k-modules6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9kernel-rt-64k-modules5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-rt-64k-modules-core6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9kernel-rt-64k-modules-core5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-rt-64k-modules-extra6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9kernel-rt-64k-modules-extra5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-rt-core6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:8kernel-rt-core4.18.0-553.150.1.rt7.491.el8_10ALSA-2026:49213
AlmaLinux:9kernel-rt-core5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-rt-debug6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:8kernel-rt-debug4.18.0-553.150.1.rt7.491.el8_10ALSA-2026:49213
AlmaLinux:9kernel-rt-debug5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-rt-debug-core6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:8kernel-rt-debug-core4.18.0-553.150.1.rt7.491.el8_10ALSA-2026:49213
AlmaLinux:9kernel-rt-debug-core5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-rt-debug-devel6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:8kernel-rt-debug-devel4.18.0-553.150.1.rt7.491.el8_10ALSA-2026:49213
AlmaLinux:9kernel-rt-debug-devel5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-rt-debug-modules6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:8kernel-rt-debug-modules4.18.0-553.150.1.rt7.491.el8_10ALSA-2026:49213
AlmaLinux:9kernel-rt-debug-modules5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-rt-debug-modules-core6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9kernel-rt-debug-modules-core5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-rt-debug-modules-extra6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:8kernel-rt-debug-modules-extra4.18.0-553.150.1.rt7.491.el8_10ALSA-2026:49213
AlmaLinux:9kernel-rt-debug-modules-extra5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-rt-devel6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:8kernel-rt-devel4.18.0-553.150.1.rt7.491.el8_10ALSA-2026:49213
AlmaLinux:9kernel-rt-devel5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-rt-modules6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:8kernel-rt-modules4.18.0-553.150.1.rt7.491.el8_10ALSA-2026:49213
AlmaLinux:9kernel-rt-modules5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-rt-modules-core6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9kernel-rt-modules-core5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-rt-modules-extra6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:8kernel-rt-modules-extra4.18.0-553.150.1.rt7.491.el8_10ALSA-2026:49213
AlmaLinux:9kernel-rt-modules-extra5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-tools6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:8kernel-tools4.18.0-553.150.1.el8_10ALSA-2026:49214
AlmaLinux:9kernel-tools5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-tools-libs6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:8kernel-tools-libs4.18.0-553.150.1.el8_10ALSA-2026:49214
AlmaLinux:9kernel-tools-libs5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-tools-libs-devel6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:8kernel-tools-libs-devel4.18.0-553.150.1.el8_10ALSA-2026:49214
AlmaLinux:9kernel-tools-libs-devel5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-uki-virt6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9kernel-uki-virt5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-uki-virt-addons6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9kernel-uki-virt-addons5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-zfcpdump6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:8kernel-zfcpdump4.18.0-553.150.1.el8_10ALSA-2026:49214
AlmaLinux:9kernel-zfcpdump5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-zfcpdump-core6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:8kernel-zfcpdump-core4.18.0-553.150.1.el8_10ALSA-2026:49214
AlmaLinux:9kernel-zfcpdump-core5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-zfcpdump-devel6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:8kernel-zfcpdump-devel4.18.0-553.150.1.el8_10ALSA-2026:49214
AlmaLinux:9kernel-zfcpdump-devel5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-zfcpdump-devel-matched6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9kernel-zfcpdump-devel-matched5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-zfcpdump-modules6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:8kernel-zfcpdump-modules4.18.0-553.150.1.el8_10ALSA-2026:49214
AlmaLinux:9kernel-zfcpdump-modules5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-zfcpdump-modules-core6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9kernel-zfcpdump-modules-core5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10kernel-zfcpdump-modules-extra6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:8kernel-zfcpdump-modules-extra4.18.0-553.150.1.el8_10ALSA-2026:49214
AlmaLinux:9kernel-zfcpdump-modules-extra5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10libperf6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9libperf5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10perf6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:8perf4.18.0-553.150.1.el8_10ALSA-2026:49214
AlmaLinux:9perf5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10python3-perf6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:8python3-perf4.18.0-553.150.1.el8_10ALSA-2026:49214
AlmaLinux:9python3-perf5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10rtla6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9rtla5.14.0-687.47.1.el9_8ALSA-2026:67150
AlmaLinux:10rv6.12.0-211.39.1.el10_2ALSA-2026:45114
AlmaLinux:9rv5.14.0-687.47.1.el9_8ALSA-2026:67150
Debian:12linuxno fix listedDEBIAN-CVE-2026-31692
Debian:13linuxno fix listedDEBIAN-CVE-2026-31692
Debian:14linux6.19.14-1DEBIAN-CVE-2026-31692
Rocky Linux:10kernel0:6.12.0-211.39.1.el10_2RLSA-2026:45114
Rocky Linux:8kernel0:4.18.0-553.150.1.el8_10RLSA-2026:49214
Rocky Linux:9kernel0:5.14.0-687.47.1.el9_8RLSA-2026:67150
Rocky Linux:8kernel-rt0:4.18.0-553.150.1.rt7.491.el8_10RLSA-2026:49213
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2026-31692
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2026-31692
Ubuntu:25.10linuxno fix listedUBUNTU-CVE-2026-31692
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-31692
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-31692
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-31692
Ubuntu:25.10linux-awsno fix listedUBUNTU-CVE-2026-31692
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-31692
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-31692

Affected products (as reported)

VendorProductVersions
Linux Linux 81adee47dfb608df3ad0b91d230fb3cef75f0060 – before 0975b64ffb34560042090a5986c3a02e6c80f36f81adee47dfb608df3ad0b91d230fb3cef75f0060 – before d04cc16d3624218a5458b2b664ae431f1b3b334d81adee47dfb608df3ad0b91d230fb3cef75f0060 – before 7b735ef81286007794a227ce2539419479c02a5f
Linux Linux 2.6.33

References