NULL pointer dereference in Linux kernel - CVE-2025-40240

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Main Vulnerability Database Vulnerabilities #VU119178

NULL pointer dereference in Linux kernel - CVE-2025-40240

Published: December 4, 2025


Vulnerability identifier: #VU119178
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-2025-40240
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to NULL pointer dereference within the sctp_inq_pop() function in net/sctp/inqueue.c. A local user can perform a denial of service (DoS) attack.


Affected software

Linux kernel
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Workstation Extension 15
Red Hat Enterprise Linux for Real Time for NFV
Red Hat CodeReady Linux Builder for Power, little endian
Anolis OS
Red Hat CodeReady Linux Builder for ARM 64
Red Hat CodeReady Linux Builder for x86_64
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for Real Time
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - TUS
SUSE Linux Enterprise Live Patching
Basesystem Module
SUSE Real Time Module
Public Cloud Module
Development Tools Module
Legacy Module
Ubuntu
openEuler
Netezza Appliance
IBM Qradar SIEM
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
kgraft-patch-4_12_14-122_290-default
kernel-livepatch-6_4_0-150700_7_28-rt-debuginfo
kernel-livepatch-6_4_0-150700_7_28-rt
kernel-livepatch-SLE15-SP7-RT_Update_8-debugsource
kernel-livepatch-6_4_0-150700_53_28-default
kernel-livepatch-SLE15-SP7_Update_8-debugsource
kernel-livepatch-6_4_0-150700_53_28-default-debuginfo
kernel (Red Hat package)
kernel-rt (Red Hat package)
dlm-kmp-default-debuginfo
kernel-default-kgraft-devel
kernel-default-debugsource
gfs2-kmp-default
ocfs2-kmp-default-debuginfo
cluster-md-kmp-default-debuginfo
kernel-default-devel
kernel-default-base
kernel-default-devel-debuginfo
kernel-default-man
kernel-default-kgraft
kernel-source
kernel-devel
kernel-macros
kernel-default
ocfs2-kmp-default
cluster-md-kmp-default
dlm-kmp-default
gfs2-kmp-default-debuginfo
kernel-default-debuginfo
kernel-syms
kernel-default-base-debuginfo
kernel-debug-core
kernel-debug
kernel-debug-modules
kernel-cross-headers
kernel-debug-modules-extra
kernel-debug-devel
kernel-core
kernel
bpftool
kernel-headers
kernel-modules
kernel-doc
kernel-abi-stablelists
python3-perf
perf
kernel-tools-libs-devel
kernel-tools-libs
kernel-tools
kernel-modules-extra
linux-aws-fips (Ubuntu package)
linux (Ubuntu package)
linux-nvidia-tegra-igx (Ubuntu package)
linux-nvidia-tegra (Ubuntu package)
linux-intel-iotg-5.15 (Ubuntu package)
linux-gcp-5.15 (Ubuntu package)
linux-intel-iot-realtime (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-intel-iotg (Ubuntu package)
linux-raspi (Ubuntu package)
linux-aws-5.15 (Ubuntu package)
linux-azure-fips (Ubuntu package)
linux-azure (Ubuntu package)
linux-azure-5.15 (Ubuntu package)
dlm-kmp-rt
kernel-rt
kernel-source-rt
kernel-devel-rt
kernel-rt-devel-debuginfo
gfs2-kmp-rt-debuginfo
kernel-rt-debuginfo
kernel-rt-devel
ocfs2-kmp-rt
kernel-syms-rt
cluster-md-kmp-rt-debuginfo
ocfs2-kmp-rt-debuginfo
dlm-kmp-rt-debuginfo
cluster-md-kmp-rt
gfs2-kmp-rt
kernel-rt-debugsource
kernel-syms-azure
kernel-azure-devel-debuginfo
kernel-azure-devel
kernel-azure-debuginfo
kernel-azure-debugsource
kernel-azure
kernel-devel-azure
kernel-source-azure
kernel-default-livepatch
kernel-docs
kernel-obs-build-debugsource
kernel-obs-build
reiserfs-kmp-default-debuginfo
reiserfs-kmp-default
kernel-default-livepatch-devel
kernel-default-extra
kernel-default-extra-debuginfo
kernel-zfcpdump-debuginfo
kernel-64kb
kernel-64kb-debuginfo
kernel-64kb-debugsource
kernel-64kb-devel-debuginfo
kernel-64kb-devel
kernel-zfcpdump-debugsource
kernel-zfcpdump
kernel-tools-devel
perf-debuginfo
python3-perf-debuginfo
kernel-tools-debuginfo
bpftool-debuginfo
kernel-debuginfo
kernel-debugsource
linux-xilinx (Ubuntu package)
linux-aws-6.8 (Ubuntu package)
linux-azure-6.8 (Ubuntu package)
linux-realtime (Ubuntu package)
linux-aws (Ubuntu package)
linux-gcp (Ubuntu package)
linux-oem-6.17 (Ubuntu package)

How to mitigate CVE-2025-40240

Install update from vendor's repository.

Netezza Appliance - update to 1.0.1.0 fp278500
IBM Qradar SIEM - update to 7.5.0 Update Pack 14 IF05
kgraft-patch-4_12_14-122_290-default - update to 1-8.7.1
kernel-livepatch-6_4_0-150700_7_28-rt-debuginfo - update to 1-150700.1.3.1
kernel-livepatch-6_4_0-150700_7_28-rt - update to 1-150700.1.3.1
kernel-livepatch-SLE15-SP7-RT_Update_8-debugsource - update to 1-150700.1.3.1
kernel-livepatch-6_4_0-150700_53_28-default - update to 1-150700.15.3.1
kernel-livepatch-SLE15-SP7_Update_8-debugsource - update to 1-150700.15.3.1
kernel-livepatch-6_4_0-150700_53_28-default-debuginfo - update to 1-150700.15.3.1
kernel (Red Hat package) - addressed in versions 3.10.0-1160.149.1.el7, 4.18.0-193.190.1.el8_2, 4.18.0-305.188.1.el8_4, 4.18.0-372.185.1.el8_6, 4.18.0-477.128.1.el8_8, 4.18.0-553.92.1.el8_10, 5.14.0-70.171.1.el9_0, 5.14.0-284.161.1.el9_2, 5.14.0-611.20.1.el9_7, 6.12.0-124.27.1.el10_1
kernel-rt (Red Hat package) - addressed in versions 3.10.0-1160.149.1.rt56.1301.el7, 4.18.0-553.92.1.rt7.433.el8_10, 5.14.0-70.171.1.rt21.243.el9_0, 5.14.0-284.161.1.rt14.446.el9_2
dlm-kmp-default-debuginfo - addressed in versions 4.12.14-122.290.1, 6.4.0-150700.53.28.1
kernel-default-kgraft-devel - update to 4.12.14-122.290.1
kernel-default-debugsource - addressed in versions 4.12.14-122.290.1, 6.4.0-150700.53.28.1
gfs2-kmp-default - addressed in versions 4.12.14-122.290.1, 6.4.0-150700.53.28.1
ocfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.290.1, 6.4.0-150700.53.28.1
cluster-md-kmp-default-debuginfo - addressed in versions 4.12.14-122.290.1, 6.4.0-150700.53.28.1
kernel-default-devel - addressed in versions 4.12.14-122.290.1, 6.4.0-150700.53.28.1
kernel-default-base - addressed in versions 4.12.14-122.290.1, 6.4.0-150700.53.28.1.150700.17.19.1
kernel-default-devel-debuginfo - addressed in versions 4.12.14-122.290.1, 6.4.0-150700.53.28.1
kernel-default-man - update to 4.12.14-122.290.1
kernel-default-kgraft - update to 4.12.14-122.290.1
kernel-source - addressed in versions 4.12.14-122.290.1, 6.4.0-150700.53.28.1
kernel-devel - addressed in versions 4.12.14-122.290.1, 6.4.0-150700.53.28.1
kernel-macros - addressed in versions 4.12.14-122.290.1, 6.4.0-150700.53.28.1
kernel-default - addressed in versions 4.12.14-122.290.1, 6.4.0-150700.53.28.1
ocfs2-kmp-default - addressed in versions 4.12.14-122.290.1, 6.4.0-150700.53.28.1
cluster-md-kmp-default - addressed in versions 4.12.14-122.290.1, 6.4.0-150700.53.28.1
dlm-kmp-default - addressed in versions 4.12.14-122.290.1, 6.4.0-150700.53.28.1
gfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.290.1, 6.4.0-150700.53.28.1
kernel-default-debuginfo - addressed in versions 4.12.14-122.290.1, 6.4.0-150700.53.28.1
kernel-syms - addressed in versions 4.12.14-122.290.1, 6.4.0-150700.53.28.1
kernel-default-base-debuginfo - update to 4.12.14-122.290.1
kernel-debug-core - update to 4.18.0-553.92.1.0.1
kernel-debug - update to 4.18.0-553.92.1.0.1
kernel-debug-modules - update to 4.18.0-553.92.1.0.1
kernel-cross-headers - update to 4.18.0-553.92.1.0.1
kernel-debug-modules-extra - update to 4.18.0-553.92.1.0.1
kernel-debug-devel - update to 4.18.0-553.92.1.0.1
kernel-core - update to 4.18.0-553.92.1.0.1
kernel-devel - update to 4.18.0-553.92.1.0.1
kernel - update to 4.18.0-553.92.1.0.1
bpftool - update to 4.18.0-553.92.1.0.1
kernel-headers - update to 4.18.0-553.92.1.0.1
kernel-modules - update to 4.18.0-553.92.1.0.1
kernel-doc - update to 4.18.0-553.92.1.0.1
kernel-abi-stablelists - update to 4.18.0-553.92.1.0.1
python3-perf - update to 4.18.0-553.92.1.0.1
perf - update to 4.18.0-553.92.1.0.1
kernel-tools-libs-devel - update to 4.18.0-553.92.1.0.1
kernel-tools-libs - update to 4.18.0-553.92.1.0.1
kernel-tools - update to 4.18.0-553.92.1.0.1
kernel-modules-extra - update to 4.18.0-553.92.1.0.1
linux-aws-fips (Ubuntu package) - addressed in versions 5.15.0.170.97, 5.15.0-170.180+fips1, 5.15.0.1100.90, 5.15.0.1100.96, 5.15.0-1100.107+fips1, 5.15.0-1100.109+fips1, 6.8.0-106.106+fips1, 6.8.0-1050.53+fips1, 6.8.0-1052.55+fips1
linux (Ubuntu package) - addressed in versions 5.15.0.170.143, 5.15.0.170.159, 5.15.0-170.180, 5.15.0.170.180~20.04.1, 5.15.0-170.180~20.04.1, 5.15.0.170.180~20.04.3, 5.15.0-170.180~20.04.3, 5.15.0.1083.82, 5.15.0-1083.91, 5.15.0.1094.90, 5.15.0-1094.97, 5.15.0.1094.97~20.04.1, 5.15.0-1094.97~20.04.1, 5.15.0.1096.95, 5.15.0-1096.102, 5.15.0.1100.96, 5.15.0.1100.103, 5.15.0-1100.107, 5.15.0-1100.109, 6.8.0-106.106, 6.8.0-106.106.1, 6.8.0-106.106.1~22.04.1, 6.8.0-106.106~22.04.1, 6.8.0-1035.38, 6.8.0-1047.48, 6.8.0-1047.48~22.04.1, 6.8.0-1048.53, 6.8.0-1049.49, 6.8.0-1049.49~22.04.1, 6.8.0-1050.53, 6.8.0-1052.55, 6.8.0-1052.55~22.04.1, 6.17.0-14.14, 6.17.0-1006.7, 6.17.0-1008.8
linux-nvidia-tegra-igx (Ubuntu package) - addressed in versions 5.15.0-1041.41+1, 5.15.0.1041.43
linux-nvidia-tegra (Ubuntu package) - addressed in versions 5.15.0-1052.52, 5.15.0.1052.52, 5.15.0-1052.52~20.04.2, 5.15.0.1052.52~20.04.2
linux-intel-iotg-5.15 (Ubuntu package) - addressed in versions 5.15.0.1064.67, 5.15.0-1064.68, 5.15.0-1095.101~20.04.1, 5.15.0.1095.101~20.04.1
linux-gcp-5.15 (Ubuntu package) - addressed in versions 5.15.0.1092.88, 5.15.0-1092.97, 5.15.0.1097.93, 5.15.0-1097.103, 5.15.0-1097.103~20.04.1, 5.15.0.1097.103~20.04.1, 5.15.0-1100.109~20.04.1, 5.15.0.1100.109~20.04.1
linux-intel-iot-realtime (Ubuntu package) - addressed in versions 5.15.0-1092.94, 5.15.0.1092.96, 5.15.0.1099.103, 5.15.0-1099.108
linux-nvidia (Ubuntu package) - addressed in versions 5.15.0.1095.95, 5.15.0-1095.96, 6.8.0-1049.52, 6.8.0-1049.52.1, 6.8.0-1049.52~22.04.1
linux-intel-iotg (Ubuntu package) - addressed in versions 5.15.0.1095.95, 5.15.0-1095.101
linux-raspi (Ubuntu package) - addressed in versions 5.15.0.1097.95, 5.15.0-1097.100, 6.8.0-1050.54, 6.8.0-2040.41
linux-aws-5.15 (Ubuntu package) - addressed in versions 5.15.0.1100.107~20.04.1, 5.15.0-1100.107~20.04.2
linux-azure-fips (Ubuntu package) - addressed in versions 5.15.0.1109.94, 5.15.0-1109.118+fips1, 6.8.0-1052.58+fips1
linux-azure (Ubuntu package) - addressed in versions 5.15.0.1109.107, 5.15.0-1109.118, 6.8.0-1051.57, 6.17.0-1008.8
linux-azure-5.15 (Ubuntu package) - update to 5.15.0-1110.119~20.04.1
dlm-kmp-rt - update to 6.4.0-150700.7.28.1
kernel-rt - update to 6.4.0-150700.7.28.1
kernel-source-rt - update to 6.4.0-150700.7.28.1
kernel-devel-rt - update to 6.4.0-150700.7.28.1
kernel-rt-devel-debuginfo - update to 6.4.0-150700.7.28.1
gfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.28.1
kernel-rt-debuginfo - update to 6.4.0-150700.7.28.1
kernel-rt-devel - update to 6.4.0-150700.7.28.1
ocfs2-kmp-rt - update to 6.4.0-150700.7.28.1
kernel-syms-rt - update to 6.4.0-150700.7.28.1
cluster-md-kmp-rt-debuginfo - update to 6.4.0-150700.7.28.1
ocfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.28.1
dlm-kmp-rt-debuginfo - update to 6.4.0-150700.7.28.1
cluster-md-kmp-rt - update to 6.4.0-150700.7.28.1
gfs2-kmp-rt - update to 6.4.0-150700.7.28.1
kernel-rt-debugsource - update to 6.4.0-150700.7.28.1
kernel-syms-azure - update to 6.4.0-150700.20.24.1
kernel-azure-devel-debuginfo - update to 6.4.0-150700.20.24.1
kernel-azure-devel - update to 6.4.0-150700.20.24.1
kernel-azure-debuginfo - update to 6.4.0-150700.20.24.1
kernel-azure-debugsource - update to 6.4.0-150700.20.24.1
kernel-azure - update to 6.4.0-150700.20.24.1
kernel-devel-azure - update to 6.4.0-150700.20.24.1
kernel-source-azure - update to 6.4.0-150700.20.24.1
kernel-default-livepatch - update to 6.4.0-150700.53.28.1
kernel-docs - update to 6.4.0-150700.53.28.1
kernel-obs-build-debugsource - update to 6.4.0-150700.53.28.1
kernel-obs-build - update to 6.4.0-150700.53.28.1
reiserfs-kmp-default-debuginfo - update to 6.4.0-150700.53.28.1
reiserfs-kmp-default - update to 6.4.0-150700.53.28.1
kernel-default-livepatch-devel - update to 6.4.0-150700.53.28.1
kernel-default-extra - update to 6.4.0-150700.53.28.1
kernel-default-extra-debuginfo - update to 6.4.0-150700.53.28.1
kernel-zfcpdump-debuginfo - update to 6.4.0-150700.53.28.1
kernel-64kb - update to 6.4.0-150700.53.28.1
kernel-64kb-debuginfo - update to 6.4.0-150700.53.28.1
kernel-64kb-debugsource - update to 6.4.0-150700.53.28.1
kernel-64kb-devel-debuginfo - update to 6.4.0-150700.53.28.1
kernel-64kb-devel - update to 6.4.0-150700.53.28.1
kernel-zfcpdump-debugsource - update to 6.4.0-150700.53.28.1
kernel-zfcpdump - update to 6.4.0-150700.53.28.1
kernel-tools - addressed in versions 6.6.0-145.0.12.138, 6.6.0-145.1.12.150
kernel-tools-devel - addressed in versions 6.6.0-145.0.12.138, 6.6.0-145.1.12.150
python3-perf - addressed in versions 6.6.0-145.0.12.138, 6.6.0-145.1.12.150
perf-debuginfo - addressed in versions 6.6.0-145.0.12.138, 6.6.0-145.1.12.150
perf - addressed in versions 6.6.0-145.0.12.138, 6.6.0-145.1.12.150
python3-perf-debuginfo - addressed in versions 6.6.0-145.0.12.138, 6.6.0-145.1.12.150
kernel-tools-debuginfo - addressed in versions 6.6.0-145.0.12.138, 6.6.0-145.1.12.150
kernel-headers - addressed in versions 6.6.0-145.0.12.138, 6.6.0-145.1.12.150
kernel-source - addressed in versions 6.6.0-145.0.12.138, 6.6.0-145.1.12.150
kernel - addressed in versions 6.6.0-145.0.12.138, 6.6.0-145.1.12.150
bpftool - addressed in versions 6.6.0-145.0.12.138, 6.6.0-145.1.12.150
bpftool-debuginfo - addressed in versions 6.6.0-145.0.12.138, 6.6.0-145.1.12.150
kernel-debuginfo - addressed in versions 6.6.0-145.0.12.138, 6.6.0-145.1.12.150
kernel-debugsource - addressed in versions 6.6.0-145.0.12.138, 6.6.0-145.1.12.150
kernel-devel - addressed in versions 6.6.0-145.0.12.138, 6.6.0-145.1.12.150
linux-xilinx (Ubuntu package) - update to 6.8.0-1029.30
linux-aws-6.8 (Ubuntu package) - update to 6.8.0-1050.53~22.04.1
linux-azure-6.8 (Ubuntu package) - update to 6.8.0-1051.57~22.04.1
linux-realtime (Ubuntu package) - addressed in versions 6.8.1-1045.46, 6.8.1-1045.46~22.04.1
linux-aws (Ubuntu package) - update to 6.17.0-1007.7
linux-gcp (Ubuntu package) - update to 6.17.0-1007.7
linux-oem-6.17 (Ubuntu package) - update to 6.17.0-1011.11

External References

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