Use-after-free in Linux kernel - CVE-2025-40248

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Main Vulnerability Database Vulnerabilities #VU119165

Use-after-free in Linux kernel - CVE-2025-40248

Published: December 4, 2025


Vulnerability identifier: #VU119165
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-40248
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the vsock_connect() function in net/vmw_vsock/af_vsock.c. A local user can escalate privileges on the system.


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 Workstation Extension 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Desktop 15
Anolis OS
Red Hat Enterprise Linux for Real Time
Red Hat CodeReady Linux Builder for Power, little endian
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 for NFV
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
SUSE Linux Enterprise Live Patching
Basesystem Module
SUSE Real Time Module
Public Cloud Module
Legacy Module
Development Tools Module
Ubuntu
IBM Qradar SIEM
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
kpatch-patch-4_18_0-372_170_1 (Red Hat package)
kpatch-patch-4_18_0-477_120_1 (Red Hat package)
kpatch-patch-4_18_0-553_85_1 (Red Hat package)
kpatch-patch-5_14_0-70_155_1 (Red Hat package)
kpatch-patch-5_14_0-284_148_1 (Red Hat package)
kpatch-patch-5_14_0-427_100_1 (Red Hat package)
kpatch-patch-5_14_0-570_66_1 (Red Hat package)
kpatch-patch-4_18_0-372_158_1 (Red Hat package)
kpatch-patch-4_18_0-477_107_1 (Red Hat package)
kpatch-patch-5_14_0-70_144_1 (Red Hat package)
kpatch-patch-5_14_0-570_39_1 (Red Hat package)
kpatch-patch-5_14_0-611_9_1 (Red Hat package)
kpatch-patch-4_18_0-553_72_1 (Red Hat package)
kpatch-patch-5_14_0-284_134_1 (Red Hat package)
kpatch-patch-5_14_0-427_84_1 (Red Hat package)
kpatch-patch-4_18_0-372_145_1 (Red Hat package)
kpatch-patch-4_18_0-477_97_1 (Red Hat package)
kpatch-patch-4_18_0-553_53_1 (Red Hat package)
kpatch-patch-5_14_0-70_132_1 (Red Hat package)
kgraft-patch-4_12_14-122_290-default
kpatch-patch-4_18_0-372_137_1 (Red Hat package)
kpatch-patch-4_18_0-477_89_1 (Red Hat package)
kpatch-patch-4_18_0-553_40_1 (Red Hat package)
kpatch-patch-5_14_0-427_68_2 (Red Hat package)
kpatch-patch-5_14_0-284_117_1 (Red Hat package)
kpatch-patch-4_18_0-477_81_1 (Red Hat package)
kpatch-patch-4_18_0-553_30_1 (Red Hat package)
kpatch-patch-5_14_0-70_124_1 (Red Hat package)
kpatch-patch-4_18_0-372_131_1 (Red Hat package)
kpatch-patch-5_14_0-427_55_1 (Red Hat package)
kpatch-patch-5_14_0-570_17_1 (Red Hat package)
kpatch-patch-5_14_0-70_121_1 (Red Hat package)
kpatch-patch-5_14_0-284_104_1 (Red Hat package)
kpatch-patch-5_14_0-427_44_1 (Red Hat package)
kpatch-patch-5_14_0-284_92_1 (Red Hat package)
kernel-livepatch-6_4_0-150700_7_28-rt
kernel-livepatch-SLE15-SP7-RT_Update_8-debugsource
kernel-livepatch-6_4_0-150700_7_28-rt-debuginfo
kernel-livepatch-SLE15-SP7_Update_8-debugsource
kernel-livepatch-6_4_0-150700_53_28-default-debuginfo
kernel-livepatch-6_4_0-150700_53_28-default
kernel-debug
bpftool
kernel
kernel-debug-devel
kernel-devel
kernel-tools
kernel-tools-libs
kernel-headers
kernel-tools-libs-devel
perf
python-perf
kernel-abi-whitelists
kernel-doc
kernel (Red Hat package)
kernel-rt (Red Hat package)
ocfs2-kmp-default-debuginfo
cluster-md-kmp-default-debuginfo
kernel-default-devel
dlm-kmp-default-debuginfo
kernel-default-base
gfs2-kmp-default
kernel-default-base-debuginfo
kernel-syms
kernel-default-debuginfo
gfs2-kmp-default-debuginfo
dlm-kmp-default
cluster-md-kmp-default
ocfs2-kmp-default
kernel-default
kernel-macros
kernel-default-debugsource
kernel-source
kernel-default-man
kernel-default-devel-debuginfo
kernel-default-kgraft
kernel-default-kgraft-devel
kernel-debug-core
kernel-cross-headers
kernel-core
kernel-debug-modules
kernel-debug-modules-extra
kernel-modules
kernel-modules-extra
python3-perf
kernel-abi-stablelists
linux-aws-fips (Ubuntu package)
linux (Ubuntu package)
linux-aws-5.15 (Ubuntu package)
linux-nvidia-tegra-igx (Ubuntu package)
linux-intel-iot-realtime (Ubuntu package)
linux-raspi (Ubuntu package)
linux-realtime (Ubuntu package)
linux-azure-fips (Ubuntu package)
linux-azure (Ubuntu package)
linux-azure-5.15 (Ubuntu package)
kernel-rt-devel
kernel-rt
kernel-source-rt
kernel-devel-rt
dlm-kmp-rt
kernel-rt-devel-debuginfo
kernel-rt-debugsource
gfs2-kmp-rt-debuginfo
gfs2-kmp-rt
cluster-md-kmp-rt
dlm-kmp-rt-debuginfo
ocfs2-kmp-rt-debuginfo
cluster-md-kmp-rt-debuginfo
kernel-syms-rt
ocfs2-kmp-rt
kernel-rt-debuginfo
kernel-azure-devel
kernel-source-azure
kernel-devel-azure
kernel-azure-debugsource
kernel-azure-debuginfo
kernel-azure-devel-debuginfo
kernel-azure
kernel-syms-azure
kernel-default-livepatch
kernel-zfcpdump
kernel-zfcpdump-debuginfo
reiserfs-kmp-default
reiserfs-kmp-default-debuginfo
kernel-zfcpdump-debugsource
kernel-docs
kernel-obs-build-debugsource
kernel-obs-build
kernel-default-livepatch-devel
kernel-default-extra
kernel-default-extra-debuginfo
kernel-64kb
kernel-64kb-debuginfo
kernel-64kb-debugsource
kernel-64kb-devel-debuginfo
kernel-64kb-devel
linux-xilinx (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-aws-6.8 (Ubuntu package)
linux-azure-6.8 (Ubuntu package)
linux-gcp-6.17 (Ubuntu package)
linux-realtime-6.17 (Ubuntu package)
linux-oem-6.17 (Ubuntu package)

How to mitigate CVE-2025-40248

Install update from vendor's repository.

IBM Qradar SIEM - update to 7.5.0 Update Pack 14 IF05
kpatch-patch-4_18_0-372_170_1 (Red Hat package) - update to 1-2.el8_6
kpatch-patch-4_18_0-477_120_1 (Red Hat package) - update to 1-2.el8_8
kpatch-patch-4_18_0-553_85_1 (Red Hat package) - update to 1-2.el8_10
kpatch-patch-5_14_0-70_155_1 (Red Hat package) - update to 1-2.el9_0
kpatch-patch-5_14_0-284_148_1 (Red Hat package) - update to 1-2.el9_2
kpatch-patch-5_14_0-427_100_1 (Red Hat package) - update to 1-2.el9_4
kpatch-patch-5_14_0-570_66_1 (Red Hat package) - update to 1-2.el9_6
kpatch-patch-4_18_0-372_158_1 (Red Hat package) - update to 1-3.el8_6
kpatch-patch-4_18_0-477_107_1 (Red Hat package) - update to 1-3.el8_8
kpatch-patch-5_14_0-70_144_1 (Red Hat package) - update to 1-3.el9_0
kpatch-patch-5_14_0-570_39_1 (Red Hat package) - update to 1-3.el9_6
kpatch-patch-5_14_0-611_9_1 (Red Hat package) - update to 1-3.el9_7
kpatch-patch-4_18_0-553_72_1 (Red Hat package) - update to 1-4.el8_10
kpatch-patch-5_14_0-284_134_1 (Red Hat package) - update to 1-4.el9_2
kpatch-patch-5_14_0-427_84_1 (Red Hat package) - update to 1-4.el9_4
kpatch-patch-4_18_0-372_145_1 (Red Hat package) - update to 1-7.el8_6
kpatch-patch-4_18_0-477_97_1 (Red Hat package) - update to 1-7.el8_8
kpatch-patch-4_18_0-553_53_1 (Red Hat package) - update to 1-7.el8_10
kpatch-patch-5_14_0-70_132_1 (Red Hat package) - update to 1-7.el9_0
kgraft-patch-4_12_14-122_290-default - update to 1-8.7.1
kpatch-patch-4_18_0-372_137_1 (Red Hat package) - update to 1-9.el8_6
kpatch-patch-4_18_0-477_89_1 (Red Hat package) - update to 1-9.el8_8
kpatch-patch-4_18_0-553_40_1 (Red Hat package) - update to 1-9.el8_10
kpatch-patch-5_14_0-427_68_2 (Red Hat package) - update to 1-9.el9_4
kpatch-patch-5_14_0-284_117_1 (Red Hat package) - update to 1-10.el9_2
kpatch-patch-4_18_0-477_81_1 (Red Hat package) - update to 1-11.el8_8
kpatch-patch-4_18_0-553_30_1 (Red Hat package) - update to 1-11.el8_10
kpatch-patch-5_14_0-70_124_1 (Red Hat package) - update to 1-11.el9_0
kpatch-patch-4_18_0-372_131_1 (Red Hat package) - update to 1-12.el8_6
kpatch-patch-5_14_0-427_55_1 (Red Hat package) - update to 1-12.el9_4
kpatch-patch-5_14_0-570_17_1 (Red Hat package) - update to 1-12.el9_6
kpatch-patch-5_14_0-70_121_1 (Red Hat package) - update to 1-13.el9_0
kpatch-patch-5_14_0-284_104_1 (Red Hat package) - update to 1-13.el9_2
kpatch-patch-5_14_0-427_44_1 (Red Hat package) - update to 1-14.el9_4
kpatch-patch-5_14_0-284_92_1 (Red Hat package) - update to 1-15.el9_2
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_7_28-rt-debuginfo - update to 1-150700.1.3.1
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-livepatch-6_4_0-150700_53_28-default - update to 1-150700.15.3.1
kernel-debug - addressed in versions 3.10.0-1160.146.1, 4.18.0-553.97.1.0.1
bpftool - addressed in versions 3.10.0-1160.146.1, 4.18.0-553.97.1.0.1
kernel - addressed in versions 3.10.0-1160.146.1, 4.18.0-553.97.1.0.1
kernel-debug-devel - addressed in versions 3.10.0-1160.146.1, 4.18.0-553.97.1.0.1
kernel-devel - addressed in versions 3.10.0-1160.146.1, 4.18.0-553.97.1.0.1
kernel-tools - addressed in versions 3.10.0-1160.146.1, 4.18.0-553.97.1.0.1
kernel-tools-libs - addressed in versions 3.10.0-1160.146.1, 4.18.0-553.97.1.0.1
kernel-headers - addressed in versions 3.10.0-1160.146.1, 4.18.0-553.97.1.0.1
kernel-tools-libs-devel - addressed in versions 3.10.0-1160.146.1, 4.18.0-553.97.1.0.1
perf - addressed in versions 3.10.0-1160.146.1, 4.18.0-553.97.1.0.1
python-perf - update to 3.10.0-1160.146.1
kernel-abi-whitelists - update to 3.10.0-1160.146.1
kernel-doc - addressed in versions 3.10.0-1160.146.1, 4.18.0-553.97.1.0.1
kernel (Red Hat package) - addressed in versions 3.10.0-1160.146.1.el7, 4.18.0-193.183.1.el8_2, 4.18.0-372.177.1.el8_6, 4.18.0-477.126.1.el8_8, 4.18.0-553.97.1.el8_10, 5.14.0-70.163.1.el9_0, 5.14.0-570.84.1.el9_6, 5.14.0-611.26.1.el9_7
kernel-rt (Red Hat package) - addressed in versions 3.10.0-1160.146.1.rt56.1298.el7, 4.18.0-553.97.1.rt7.438.el8_10, 5.14.0-70.163.1.rt21.235.el9_0, 5.14.0-284.155.1.rt14.440.el9_2
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
dlm-kmp-default-debuginfo - 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-default-base - addressed in versions 4.12.14-122.290.1, 6.4.0-150700.53.28.1.150700.17.19.1
gfs2-kmp-default - 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-syms - 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
gfs2-kmp-default-debuginfo - 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
cluster-md-kmp-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
kernel-default - 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-debugsource - addressed in versions 4.12.14-122.290.1, 6.4.0-150700.53.28.1
kernel-source - 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-devel-debuginfo - addressed in versions 4.12.14-122.290.1, 6.4.0-150700.53.28.1
kernel-default-kgraft - update to 4.12.14-122.290.1
kernel-default-kgraft-devel - update to 4.12.14-122.290.1
kernel-debug-core - update to 4.18.0-553.97.1.0.1
kernel-cross-headers - update to 4.18.0-553.97.1.0.1
kernel-core - update to 4.18.0-553.97.1.0.1
kernel-debug-modules - update to 4.18.0-553.97.1.0.1
kernel-debug-modules-extra - update to 4.18.0-553.97.1.0.1
kernel-modules - update to 4.18.0-553.97.1.0.1
kernel-modules-extra - update to 4.18.0-553.97.1.0.1
python3-perf - update to 4.18.0-553.97.1.0.1
kernel-abi-stablelists - update to 4.18.0-553.97.1.0.1
linux-aws-fips (Ubuntu package) - addressed in versions 5.15.0.173.100, 5.15.0-173.183+fips1, 5.15.0.1103.93, 5.15.0.1103.99, 5.15.0-1103.110+fips1, 5.15.0-1103.112+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 5.15.0.173.146, 5.15.0.173.161, 5.15.0-173.183, 5.15.0-1055.55, 5.15.0-1055.55~20.04.1, 5.15.0.1067.70, 5.15.0-1067.71, 5.15.0.1086.85, 5.15.0-1086.94, 5.15.0.1095.91, 5.15.0-1095.100, 5.15.0.1097.93, 5.15.0.1097.100, 5.15.0-1097.100~20.04.1, 5.15.0.1098.98, 5.15.0-1098.99, 5.15.0-1098.104, 5.15.0.1100.96, 5.15.0-1100.106, 5.15.0.1103.99, 5.15.0.1103.106, 5.15.0-1103.110, 5.15.0-1103.112~20.04.1, 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, 6.17.0-19.19, 6.17.0-19.19~24.04.2, 6.17.0-1009.9, 6.17.0-1009.9~24.04.1, 6.17.0-1009.9~24.04.2
linux-aws-5.15 (Ubuntu package) - addressed in versions 5.15.0-173.183~20.04.1, 5.15.0-1098.104~20.04.1, 5.15.0.1099.98, 5.15.0-1099.105, 5.15.0-1100.106~20.04.1, 5.15.0-1103.110~20.04.1, 5.15.0-1103.112~20.04.1
linux-nvidia-tegra-igx (Ubuntu package) - addressed in versions 5.15.0-1044.44, 5.15.0.1044.46
linux-intel-iot-realtime (Ubuntu package) - addressed in versions 5.15.0-1094.96, 5.15.0.1094.98
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, 6.17.0-1010.10
linux-realtime (Ubuntu package) - addressed in versions 5.15.0.1102.106, 5.15.0-1102.111, 6.8.1-1045.46, 6.8.1-1045.46~22.04.1
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, 6.17.0-1010.10, 6.17.0-1010.10~24.04.1
linux-azure-5.15 (Ubuntu package) - update to 5.15.0-1110.119~20.04.1
kernel-rt-devel - 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
dlm-kmp-rt - update to 6.4.0-150700.7.28.1
kernel-rt-devel-debuginfo - update to 6.4.0-150700.7.28.1
kernel-rt-debugsource - update to 6.4.0-150700.7.28.1
gfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.28.1
gfs2-kmp-rt - update to 6.4.0-150700.7.28.1
cluster-md-kmp-rt - update to 6.4.0-150700.7.28.1
dlm-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
cluster-md-kmp-rt-debuginfo - update to 6.4.0-150700.7.28.1
kernel-syms-rt - update to 6.4.0-150700.7.28.1
ocfs2-kmp-rt - update to 6.4.0-150700.7.28.1
kernel-rt-debuginfo - update to 6.4.0-150700.7.28.1
kernel-azure-devel - update to 6.4.0-150700.20.24.1
kernel-source-azure - update to 6.4.0-150700.20.24.1
kernel-devel-azure - update to 6.4.0-150700.20.24.1
kernel-azure-debugsource - update to 6.4.0-150700.20.24.1
kernel-azure-debuginfo - update to 6.4.0-150700.20.24.1
kernel-azure-devel-debuginfo - update to 6.4.0-150700.20.24.1
kernel-azure - update to 6.4.0-150700.20.24.1
kernel-syms-azure - update to 6.4.0-150700.20.24.1
kernel-default-livepatch - update to 6.4.0-150700.53.28.1
kernel-zfcpdump - update to 6.4.0-150700.53.28.1
kernel-zfcpdump-debuginfo - update to 6.4.0-150700.53.28.1
reiserfs-kmp-default - update to 6.4.0-150700.53.28.1
reiserfs-kmp-default-debuginfo - update to 6.4.0-150700.53.28.1
kernel-zfcpdump-debugsource - 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
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-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
linux-xilinx (Ubuntu package) - update to 6.8.0-1029.30
linux-nvidia (Ubuntu package) - addressed in versions 6.8.0-1049.52, 6.8.0-1049.52.1, 6.8.0-1049.52~22.04.1
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-gcp-6.17 (Ubuntu package) - addressed in versions 6.17.0-1008.9, 6.17.0-1009.9~24.04.3
linux-realtime-6.17 (Ubuntu package) - update to 6.17.0-1008.9~24.04.1
linux-oem-6.17 (Ubuntu package) - update to 6.17.0-1017.17

External References

Related Security Bulletins