Improper control of a resource through its lifetime in Linux kernel - CVE-2026-31418

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Main Vulnerability Database Vulnerabilities #VU125858

Improper control of a resource through its lifetime in Linux kernel - CVE-2026-31418

Published: April 14, 2026


Vulnerability identifier: #VU125858
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-31418
CWE-ID: CWE-664
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper resource management in mtype_del in the ipset netfilter subsystem when deleting entries from buckets containing only deleted slots below the current position. A local user can trigger bucket deletion handling with crafted set operations to cause a denial of service.


Affected software

Linux kernel
Debian Linux
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Micro Extras
SUSE Linux Micro
SUSE Real Time Module
Legacy Module
Development Tools Module
Basesystem Module
SUSE Linux Enterprise Live Patching
Public Cloud Module
Ubuntu
openEuler
linux (Ubuntu package)
linux-oracle (Ubuntu package)
linux-azure (Ubuntu package)
linux-kvm (Ubuntu package)
linux-aws (Ubuntu package)
linux-gcp (Ubuntu package)
linux-hwe-5.4 (Ubuntu package)
linux-xilinx-zynqmp (Ubuntu package)
linux-ibm (Ubuntu package)
linux-bluefield (Ubuntu package)
linux-iot (Ubuntu package)
linux-raspi (Ubuntu package)
linux-ibm-5.4 (Ubuntu package)
linux-aws-5.4 (Ubuntu package)
linux-azure-5.4 (Ubuntu package)
linux-gcp-5.4 (Ubuntu package)
linux-oracle-5.4 (Ubuntu package)
linux-raspi-5.4 (Ubuntu package)
linux-fips (Ubuntu package)
linux-aws-fips (Ubuntu package)
linux-gcp-fips (Ubuntu package)
linux-azure-fips (Ubuntu package)
linux-lowlatency (Ubuntu package)
linux-gke (Ubuntu package)
linux-aws-5.15 (Ubuntu package)
linux-lowlatency-hwe-5.15 (Ubuntu package)
linux-hwe-5.15 (Ubuntu package)
linux-azure-5.15 (Ubuntu package)
linux-azure-fde-5.15 (Ubuntu package)
linux-nvidia-tegra (Ubuntu package)
linux-ibm-5.15 (Ubuntu package)
linux-intel-iotg (Ubuntu package)
linux-gkeop (Ubuntu package)
linux-realtime (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-nvidia-tegra-igx (Ubuntu package)
linux-intel-iotg-5.15 (Ubuntu package)
linux-oracle-5.15 (Ubuntu package)
linux-gcp-5.15 (Ubuntu package)
linux-nvidia-tegra-5.15 (Ubuntu package)
linux-intel-iot-realtime (Ubuntu package)
linux-hwe-6.17 (Ubuntu package)
linux-gcp-6.17 (Ubuntu package)
linux-oracle-6.17 (Ubuntu package)
linux-azure-6.17 (Ubuntu package)
linux-nvidia-6.17 (Ubuntu package)
linux-oem-6.17 (Ubuntu package)
linux-aws-6.17 (Ubuntu package)
linux-realtime-6.17 (Ubuntu package)
kernel-livepatch-SLE15-SP7-RT_Update_20-debugsource
kernel-livepatch-6_4_0-150700_7_75-rt
kernel-livepatch-6_4_0-150700_7_75-rt-debuginfo
kernel-livepatch-SLE15-SP7_Update_21-debugsource
kernel-livepatch-6_4_0-150700_53_81-default-debuginfo
kernel-livepatch-6_4_0-150700_53_81-default
kernel-64kb-devel
kernel-default
kernel-64kb
kernel-64kb-debugsource
kernel-rt-livepatch
kernel-obs-build
kernel-syms
kernel-default-devel
kernel-default-debugsource
kernel-obs-build-debugsource
kernel-default-devel-debuginfo
kernel-kvmsmall-debuginfo
kernel-default-debuginfo
kernel-kvmsmall-debugsource
kernel-rt-debugsource
kernel-rt-debuginfo
kernel-rt
kernel-devel-rt
kernel-source-rt
kernel-kvmsmall
kernel-devel
kernel-macros
kernel-source
kernel-default-livepatch
kernel-default-base
cluster-md-kmp-rt-debuginfo
dlm-kmp-rt-debuginfo
gfs2-kmp-rt
ocfs2-kmp-rt-debuginfo
kernel-syms-rt
kernel-rt-devel-debuginfo
cluster-md-kmp-rt
kernel-rt-devel
dlm-kmp-rt
gfs2-kmp-rt-debuginfo
ocfs2-kmp-rt
ocfs2-kmp-default-debuginfo
cluster-md-kmp-default-debuginfo
dlm-kmp-default
gfs2-kmp-default-debuginfo
ocfs2-kmp-default
dlm-kmp-default-debuginfo
cluster-md-kmp-default
gfs2-kmp-default
reiserfs-kmp-default-debuginfo
kernel-azure
kernel-azure-devel
reiserfs-kmp-default
kernel-docs
kernel-64kb-devel-debuginfo
kernel-default-livepatch-devel
kernel-64kb-debuginfo
kernel-zfcpdump-debuginfo
kernel-zfcpdump-debugsource
kernel-zfcpdump
kernel-azure-debuginfo
kernel-azure-debugsource
kernel-default-extra
kernel-default-extra-debuginfo
kernel-azure-devel-debuginfo
bpftool
python3-perf-debuginfo
python3-perf
kernel
perf-debuginfo
perf
kernel-tools-devel
kernel-tools-debuginfo
kernel-tools
kernel-headers
kernel-debugsource
kernel-debuginfo
bpftool-debuginfo
kernel-extra-modules
linux (Debian package)
linux-hwe-6.8 (Ubuntu package)
linux-aws-6.8 (Ubuntu package)
linux-azure-fde-6.8 (Ubuntu package)
linux-azure-fde (Ubuntu package)
linux-raspi-realtime (Ubuntu package)
linux-azure-fde-6.17 (Ubuntu package)

How to mitigate CVE-2026-31418

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux (Ubuntu package) - addressed in versions 5.4.0-233.253, 5.15.0-185.195, 6.8.0-134.134, 6.8.0-1057.58~22.04.1, 6.8.0-1058.61~22.04.1, 6.8.0-1058.61+fips1, 6.8.0-1060.61, 6.8.0-1060.63~22.04.1, 6.8.0-1060.63+fips1, 6.8.0-1063.69, 6.8.0-1063.69+fips1, 6.8.1-1055.56~22.04.1, 6.8.1-1055.56, 6.17.0-40.40
linux-oracle (Ubuntu package) - addressed in versions 5.4.0-1159.169, 5.15.0-1108.114, 6.17.0-1018.18
linux-azure (Ubuntu package) - addressed in versions 5.4.0-1166.172, 5.15.0-1116.125, 6.8.0-1063.71~22.04.1, 6.8.0-1063.71
linux-kvm (Ubuntu package) - addressed in versions 5.4.0-1148.157, 5.15.0-1103.108
linux-aws (Ubuntu package) - addressed in versions 5.4.0-1161.172, 5.15.0-1111.118, 6.17.0-1019.19
linux-gcp (Ubuntu package) - addressed in versions 5.4.0-1164.173, 5.15.0-1111.121, 6.17.0-1020.22
linux-hwe-5.4 (Ubuntu package) - update to 5.4.0-233.253~18.04.1
linux-xilinx-zynqmp (Ubuntu package) - addressed in versions 5.4.0-1079.83, 5.15.0-1074.78
linux-ibm (Ubuntu package) - addressed in versions 5.4.0-1107.112, 5.15.0-1105.109
linux-bluefield (Ubuntu package) - update to 5.4.0-1120.127
linux-iot (Ubuntu package) - update to 5.4.0-1065.68
linux-raspi (Ubuntu package) - addressed in versions 5.4.0-1144.157, 5.15.0-1105.108, 6.8.0-1060.64, 6.17.0-1021.21
linux-ibm-5.4 (Ubuntu package) - update to 5.4.0-1107.112~18.04.1
linux-aws-5.4 (Ubuntu package) - update to 5.4.0-1161.172~18.04.1
linux-azure-5.4 (Ubuntu package) - update to 5.4.0-1166.172~18.04.1
linux-gcp-5.4 (Ubuntu package) - update to 5.4.0-1164.173~18.04.1
linux-oracle-5.4 (Ubuntu package) - update to 5.4.0-1159.169~18.04.1
linux-raspi-5.4 (Ubuntu package) - update to 5.4.0-1144.157~18.04.1
linux-fips (Ubuntu package) - addressed in versions 5.4.0-1135.145, 5.15.0-185.195+fips1
linux-aws-fips (Ubuntu package) - addressed in versions 5.4.0-1161.172+fips1, 5.15.0-1111.118+fips1
linux-gcp-fips (Ubuntu package) - addressed in versions 5.4.0-1164.173+fips1, 5.15.0-1111.121+fips1
linux-azure-fips (Ubuntu package) - addressed in versions 5.4.0-1166.172+fips1, 5.15.0-1116.125+fips1, 6.8.0-134.134+fips1, 6.8.0-1062.69+fips1
linux-lowlatency (Ubuntu package) - update to 5.15.0-183.193
linux-gke (Ubuntu package) - update to 5.15.0-1107.113
linux-aws-5.15 (Ubuntu package) - update to 5.15.0-1111.118~20.04.1
linux-lowlatency-hwe-5.15 (Ubuntu package) - update to 5.15.0-183.193~20.04.1
linux-hwe-5.15 (Ubuntu package) - update to 5.15.0-185.195~20.04.1
linux-azure-5.15 (Ubuntu package) - update to 5.15.0-1116.125~20.04.1
linux-azure-fde-5.15 (Ubuntu package) - update to 5.15.0-1116.125~20.04.1
linux-nvidia-tegra (Ubuntu package) - addressed in versions 5.15.0-1063.63, 6.8.0-1029.30
linux-ibm-5.15 (Ubuntu package) - update to 5.15.0-1105.109~20.04.1
linux-intel-iotg (Ubuntu package) - update to 5.15.0-1106.112
linux-gkeop (Ubuntu package) - update to 5.15.0-1094.102
linux-realtime (Ubuntu package) - addressed in versions 5.15.0-1110.119, 6.17.0-1017.19
linux-nvidia (Ubuntu package) - update to 5.15.0-1106.107
linux-nvidia-tegra-igx (Ubuntu package) - update to 5.15.0-1052.52
linux-intel-iotg-5.15 (Ubuntu package) - update to 5.15.0-1106.112~20.04.1
linux-oracle-5.15 (Ubuntu package) - update to 5.15.0-1108.114~20.04.1
linux-gcp-5.15 (Ubuntu package) - update to 5.15.0-1111.121~20.04.1
linux-nvidia-tegra-5.15 (Ubuntu package) - update to 5.15.0-1063.63~20.04.1
linux-intel-iot-realtime (Ubuntu package) - update to 5.15.0-1103.105
linux-hwe-6.17 (Ubuntu package) - update to 6.17.0-40.40~24.04.1
linux-gcp-6.17 (Ubuntu package) - update to 6.17.0-1020.22~24.04.1
linux-oracle-6.17 (Ubuntu package) - update to 6.17.0-1018.18~24.04.1
linux-azure-6.17 (Ubuntu package) - update to 6.17.0-1021.21~24.04.1
linux-nvidia-6.17 (Ubuntu package) - update to 6.17.0-1026.26
linux-oem-6.17 (Ubuntu package) - update to 6.17.0-1028.28
linux-aws-6.17 (Ubuntu package) - update to 6.17.0-1019.19~24.04.1
linux-realtime-6.17 (Ubuntu package) - update to 6.17.0-1017.19~24.04.1
kernel-livepatch-SLE15-SP7-RT_Update_20-debugsource - update to 1-150700.1.3.1
kernel-livepatch-6_4_0-150700_7_75-rt - update to 1-150700.1.3.1
kernel-livepatch-6_4_0-150700_7_75-rt-debuginfo - update to 1-150700.1.3.1
kernel-livepatch-SLE15-SP7_Update_21-debugsource - update to 1-150700.15.3.1
kernel-livepatch-6_4_0-150700_53_81-default-debuginfo - update to 1-150700.15.3.1
kernel-livepatch-6_4_0-150700_53_81-default - update to 1-150700.15.3.1
kernel-64kb-devel - addressed in versions 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-default - addressed in versions 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-64kb - addressed in versions 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-64kb-debugsource - addressed in versions 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-rt-livepatch - update to 6.4.0-52.1
kernel-obs-build - addressed in versions 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-syms - addressed in versions 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-default-devel - addressed in versions 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-default-debugsource - addressed in versions 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-obs-build-debugsource - addressed in versions 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-default-devel-debuginfo - addressed in versions 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-kvmsmall-debuginfo - update to 6.4.0-52.1
kernel-default-debuginfo - addressed in versions 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-kvmsmall-debugsource - update to 6.4.0-52.1
kernel-rt-debugsource - addressed in versions 6.4.0-52.1, 6.4.0-150700.7.75.1
kernel-rt-debuginfo - addressed in versions 6.4.0-52.1, 6.4.0-150700.7.75.1
kernel-rt - addressed in versions 6.4.0-52.1, 6.4.0-150700.7.75.1
kernel-devel-rt - addressed in versions 6.4.0-52.1, 6.4.0-150700.7.75.1
kernel-source-rt - addressed in versions 6.4.0-52.1, 6.4.0-150700.7.75.1
kernel-kvmsmall - update to 6.4.0-52.1
kernel-devel - addressed in versions 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-macros - addressed in versions 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-source - addressed in versions 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-default-livepatch - addressed in versions 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-default-base - addressed in versions 6.4.0-52.1.21.35, 6.4.0-52.1.21.36, 6.4.0-150700.53.81.1.150700.17.45.1
cluster-md-kmp-rt-debuginfo - update to 6.4.0-150700.7.75.1
dlm-kmp-rt-debuginfo - update to 6.4.0-150700.7.75.1
gfs2-kmp-rt - update to 6.4.0-150700.7.75.1
ocfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.75.1
kernel-syms-rt - update to 6.4.0-150700.7.75.1
kernel-rt-devel-debuginfo - update to 6.4.0-150700.7.75.1
cluster-md-kmp-rt - update to 6.4.0-150700.7.75.1
kernel-rt-devel - update to 6.4.0-150700.7.75.1
dlm-kmp-rt - update to 6.4.0-150700.7.75.1
gfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.75.1
ocfs2-kmp-rt - update to 6.4.0-150700.7.75.1
ocfs2-kmp-default-debuginfo - update to 6.4.0-150700.53.81.1
cluster-md-kmp-default-debuginfo - update to 6.4.0-150700.53.81.1
dlm-kmp-default - update to 6.4.0-150700.53.81.1
gfs2-kmp-default-debuginfo - update to 6.4.0-150700.53.81.1
ocfs2-kmp-default - update to 6.4.0-150700.53.81.1
dlm-kmp-default-debuginfo - update to 6.4.0-150700.53.81.1
cluster-md-kmp-default - update to 6.4.0-150700.53.81.1
gfs2-kmp-default - update to 6.4.0-150700.53.81.1
reiserfs-kmp-default-debuginfo - update to 6.4.0-150700.53.81.1
kernel-azure - update to 6.4.0-150700.53.81.1
kernel-azure-devel - update to 6.4.0-150700.53.81.1
reiserfs-kmp-default - update to 6.4.0-150700.53.81.1
kernel-docs - update to 6.4.0-150700.53.81.1
kernel-64kb-devel-debuginfo - update to 6.4.0-150700.53.81.1
kernel-default-livepatch-devel - update to 6.4.0-150700.53.81.1
kernel-64kb-debuginfo - update to 6.4.0-150700.53.81.1
kernel-zfcpdump-debuginfo - update to 6.4.0-150700.53.81.1
kernel-zfcpdump-debugsource - update to 6.4.0-150700.53.81.1
kernel-zfcpdump - update to 6.4.0-150700.53.81.1
kernel-azure-debuginfo - update to 6.4.0-150700.53.81.1
kernel-azure-debugsource - update to 6.4.0-150700.53.81.1
kernel-default-extra - update to 6.4.0-150700.53.81.1
kernel-default-extra-debuginfo - update to 6.4.0-150700.53.81.1
kernel-azure-devel-debuginfo - update to 6.4.0-150700.53.81.1
bpftool - addressed in versions 6.6.0-145.0.9.136, 6.6.0-145.0.9.140, 6.6.0-145.0.9.148
python3-perf-debuginfo - addressed in versions 6.6.0-145.0.9.136, 6.6.0-145.0.9.140, 6.6.0-145.0.9.148
python3-perf - addressed in versions 6.6.0-145.0.9.136, 6.6.0-145.0.9.140, 6.6.0-145.0.9.148
kernel - addressed in versions 6.6.0-145.0.9.136, 6.6.0-145.0.9.140, 6.6.0-145.0.9.148
perf-debuginfo - addressed in versions 6.6.0-145.0.9.136, 6.6.0-145.0.9.140, 6.6.0-145.0.9.148
perf - addressed in versions 6.6.0-145.0.9.136, 6.6.0-145.0.9.140, 6.6.0-145.0.9.148
kernel-tools-devel - addressed in versions 6.6.0-145.0.9.136, 6.6.0-145.0.9.140, 6.6.0-145.0.9.148
kernel-tools-debuginfo - addressed in versions 6.6.0-145.0.9.136, 6.6.0-145.0.9.140, 6.6.0-145.0.9.148
kernel-tools - addressed in versions 6.6.0-145.0.9.136, 6.6.0-145.0.9.140, 6.6.0-145.0.9.148
kernel-source - addressed in versions 6.6.0-145.0.9.136, 6.6.0-145.0.9.140, 6.6.0-145.0.9.148
kernel-headers - addressed in versions 6.6.0-145.0.9.136, 6.6.0-145.0.9.140, 6.6.0-145.0.9.148
kernel-devel - addressed in versions 6.6.0-145.0.9.136, 6.6.0-145.0.9.140, 6.6.0-145.0.9.148
kernel-debugsource - addressed in versions 6.6.0-145.0.9.136, 6.6.0-145.0.9.140, 6.6.0-145.0.9.148
kernel-debuginfo - addressed in versions 6.6.0-145.0.9.136, 6.6.0-145.0.9.140, 6.6.0-145.0.9.148
bpftool-debuginfo - addressed in versions 6.6.0-145.0.9.136, 6.6.0-145.0.9.140, 6.6.0-145.0.9.148
kernel-extra-modules - update to 6.6.0-145.0.9.140
linux (Debian package) - addressed in versions 6.1.170-1, 6.12.85-1
linux-hwe-6.8 (Ubuntu package) - update to 6.8.0-136.136~22.04.1
linux-aws-6.8 (Ubuntu package) - addressed in versions 6.8.0-1045.48, 6.8.0-1057.58~22.04.1, 6.8.0-1058.61.1, 6.8.0-1058.64, 6.8.0-1060.61~22.04.1, 6.8.0-1060.63~22.04.1, 6.8.0-1063.69~22.04.1
linux-azure-fde-6.8 (Ubuntu package) - update to 6.8.0-1062.69~22.04.1
linux-azure-fde (Ubuntu package) - update to 6.8.0-1062.69
linux-raspi-realtime (Ubuntu package) - update to 6.8.0-2049.50
linux-azure-fde-6.17 (Ubuntu package) - update to 6.17.0-1018.18~24.04.1

External References

Related Security Bulletins