Use-after-free in Linux kernel - CVE-2025-40271

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Main Vulnerability Database Vulnerabilities #VU119315

Use-after-free in Linux kernel - CVE-2025-40271

Published: December 8, 2025


Vulnerability identifier: #VU119315
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-2025-40271
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 pde_put(), remove_proc_entry() and remove_proc_subtree() functions in fs/proc/generic.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 ARM 64
Red Hat CodeReady Linux Builder for Power, little endian
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 x86_64 - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support
Red Hat CodeReady Linux Builder for IBM z Systems - Extended Update Support
Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support
Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support
SUSE Linux Enterprise Live Patching
SUSE Real Time Module
Basesystem Module
Public Cloud Module
Development Tools Module
Legacy Module
openEuler
Ubuntu
Netezza Appliance
Technical Support Appliance
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
kgraft-patch-4_12_14-122_293-default
kernel-livepatch-6_4_0-150700_7_28-rt
kernel-livepatch-6_4_0-150700_7_28-rt-debuginfo
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-abi-whitelists
bpftool
kernel
kernel-debug
kernel-debug-devel
kernel-devel
kernel-headers
kernel-tools
kernel-tools-libs
kernel-tools-libs-devel
perf
python-perf
kernel-doc
kernel (Red Hat package)
kernel-rt (Red Hat package)
gfs2-kmp-default-debuginfo
kernel-syms
kernel-default-devel
kernel-source
ocfs2-kmp-default
ocfs2-kmp-default-debuginfo
cluster-md-kmp-default
kernel-default-base
dlm-kmp-default
dlm-kmp-default-debuginfo
gfs2-kmp-default
kernel-default-base-debuginfo
cluster-md-kmp-default-debuginfo
kernel-default-kgraft
kernel-default-debuginfo
kernel-default-debugsource
kernel-default-kgraft-devel
kernel-default
kernel-default-man
kernel-default-devel-debuginfo
kernel-macros
kernel-abi-stablelists
kernel-core
kernel-cross-headers
kernel-debug-core
kernel-debug-modules
kernel-debug-modules-extra
kernel-modules
kernel-modules-extra
python3-perf
bpftool-debuginfo
kernel-debuginfo
kernel-debugsource
python3-perf-debuginfo
python2-perf
perf-debuginfo
kernel-tools-devel
kernel-tools-debuginfo
python2-perf-debuginfo
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)
gfs2-kmp-rt-debuginfo
cluster-md-kmp-rt-debuginfo
kernel-syms-rt
ocfs2-kmp-rt
kernel-rt-devel
kernel-rt-debuginfo
ocfs2-kmp-rt-debuginfo
dlm-kmp-rt-debuginfo
cluster-md-kmp-rt
gfs2-kmp-rt
kernel-rt-debugsource
kernel-rt-devel-debuginfo
dlm-kmp-rt
kernel-devel-rt
kernel-source-rt
kernel-rt
kernel-azure-devel-debuginfo
kernel-devel-azure
kernel-source-azure
kernel-azure-debugsource
kernel-azure-debuginfo
kernel-azure
kernel-syms-azure
kernel-azure-devel
kernel-default-extra
kernel-64kb
reiserfs-kmp-default
reiserfs-kmp-default-debuginfo
kernel-obs-build
kernel-obs-build-debugsource
kernel-default-livepatch
kernel-default-livepatch-devel
kernel-default-extra-debuginfo
kernel-docs
kernel-64kb-debuginfo
kernel-64kb-debugsource
kernel-64kb-devel-debuginfo
kernel-64kb-devel
kernel-zfcpdump
kernel-zfcpdump-debuginfo
kernel-zfcpdump-debugsource
kernel-extra-modules
linux-xilinx (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-aws-6.8 (Ubuntu package)
linux-azure-6.8 (Ubuntu package)
linux-aws (Ubuntu package)
linux-gcp (Ubuntu package)
linux-oem-6.17 (Ubuntu package)

How to mitigate CVE-2025-40271

Install update from vendor's repository.

Netezza Appliance - update to 1.0.1.0 fp278500
kgraft-patch-4_12_14-122_293-default - update to 1-8.3.1
kernel-livepatch-6_4_0-150700_7_28-rt - 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-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
Technical Support Appliance - update to 3.1.2
kernel-abi-whitelists - update to 3.10.0-1160.147.1
bpftool - addressed in versions 3.10.0-1160.147.1, 4.18.0-553.100.1.0.1
kernel - addressed in versions 3.10.0-1160.147.1, 4.18.0-553.100.1.0.1
kernel-debug - addressed in versions 3.10.0-1160.147.1, 4.18.0-553.100.1.0.1
kernel-debug-devel - addressed in versions 3.10.0-1160.147.1, 4.18.0-553.100.1.0.1
kernel-devel - addressed in versions 3.10.0-1160.147.1, 4.18.0-553.100.1.0.1
kernel-headers - addressed in versions 3.10.0-1160.147.1, 4.18.0-553.100.1.0.1
kernel-tools - addressed in versions 3.10.0-1160.147.1, 4.18.0-553.100.1.0.1
kernel-tools-libs - addressed in versions 3.10.0-1160.147.1, 4.18.0-553.100.1.0.1
kernel-tools-libs-devel - addressed in versions 3.10.0-1160.147.1, 4.18.0-553.100.1.0.1
perf - addressed in versions 3.10.0-1160.147.1, 4.18.0-553.100.1.0.1
python-perf - update to 3.10.0-1160.147.1
kernel-doc - addressed in versions 3.10.0-1160.147.1, 4.18.0-553.100.1.0.1
kernel (Red Hat package) - addressed in versions 3.10.0-1160.147.1.el7, 4.18.0-193.187.1.el8_2, 4.18.0-305.186.1.el8_4, 4.18.0-372.181.1.el8_6, 4.18.0-477.130.1.el8_8, 4.18.0-553.100.1.el8_10, 5.14.0-70.167.1.el9_0, 5.14.0-284.158.1.el9_2, 5.14.0-427.111.1.el9_4, 5.14.0-570.89.1.el9_6, 5.14.0-611.30.1.el9_7, 6.12.0-55.60.1.el10_0
kernel-rt (Red Hat package) - addressed in versions 3.10.0-1160.147.1.rt56.1299.el7, 4.18.0-553.100.1.rt7.441.el8_10, 5.14.0-70.167.1.rt21.239.el9_0, 5.14.0-284.158.1.rt14.443.el9_2
gfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.293.1, 6.4.0-150700.53.28.1
kernel-syms - addressed in versions 4.12.14-122.293.1, 6.4.0-150700.53.28.1
kernel-default-devel - addressed in versions 4.12.14-122.293.1, 6.4.0-150700.53.28.1
kernel-source - addressed in versions 4.12.14-122.293.1, 6.4.0-150700.53.28.1
ocfs2-kmp-default - addressed in versions 4.12.14-122.293.1, 6.4.0-150700.53.28.1
ocfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.293.1, 6.4.0-150700.53.28.1
cluster-md-kmp-default - addressed in versions 4.12.14-122.293.1, 6.4.0-150700.53.28.1
kernel-default-base - addressed in versions 4.12.14-122.293.1, 6.4.0-150700.53.28.1.150700.17.19.1
kernel-devel - addressed in versions 4.12.14-122.293.1, 6.4.0-150700.53.28.1
dlm-kmp-default - addressed in versions 4.12.14-122.293.1, 6.4.0-150700.53.28.1
dlm-kmp-default-debuginfo - addressed in versions 4.12.14-122.293.1, 6.4.0-150700.53.28.1
gfs2-kmp-default - addressed in versions 4.12.14-122.293.1, 6.4.0-150700.53.28.1
kernel-default-base-debuginfo - update to 4.12.14-122.293.1
cluster-md-kmp-default-debuginfo - addressed in versions 4.12.14-122.293.1, 6.4.0-150700.53.28.1
kernel-default-kgraft - update to 4.12.14-122.293.1
kernel-default-debuginfo - addressed in versions 4.12.14-122.293.1, 6.4.0-150700.53.28.1
kernel-default-debugsource - addressed in versions 4.12.14-122.293.1, 6.4.0-150700.53.28.1
kernel-default-kgraft-devel - update to 4.12.14-122.293.1
kernel-default - addressed in versions 4.12.14-122.293.1, 6.4.0-150700.53.28.1
kernel-default-man - update to 4.12.14-122.293.1
kernel-default-devel-debuginfo - addressed in versions 4.12.14-122.293.1, 6.4.0-150700.53.28.1
kernel-macros - addressed in versions 4.12.14-122.293.1, 6.4.0-150700.53.28.1
kernel-abi-stablelists - update to 4.18.0-553.100.1.0.1
kernel-core - update to 4.18.0-553.100.1.0.1
kernel-cross-headers - update to 4.18.0-553.100.1.0.1
kernel-debug-core - update to 4.18.0-553.100.1.0.1
kernel-debug-modules - update to 4.18.0-553.100.1.0.1
kernel-debug-modules-extra - update to 4.18.0-553.100.1.0.1
kernel-modules - update to 4.18.0-553.100.1.0.1
kernel-modules-extra - update to 4.18.0-553.100.1.0.1
python3-perf - update to 4.18.0-553.100.1.0.1
kernel-source - addressed in versions 4.19.90-2602.1.0.0361, 5.10.0-301.0.0.204, 6.6.0-144.0.0.127, 6.6.0-144.0.0.139, 6.6.0-144.0.0.140
kernel - addressed in versions 4.19.90-2602.1.0.0361, 5.10.0-301.0.0.204, 6.6.0-144.0.0.127, 6.6.0-144.0.0.139, 6.6.0-144.0.0.140
bpftool - addressed in versions 4.19.90-2602.1.0.0361, 5.10.0-301.0.0.204, 6.6.0-144.0.0.127, 6.6.0-144.0.0.139, 6.6.0-144.0.0.140
bpftool-debuginfo - addressed in versions 4.19.90-2602.1.0.0361, 5.10.0-301.0.0.204, 6.6.0-144.0.0.127, 6.6.0-144.0.0.139, 6.6.0-144.0.0.140
kernel-debuginfo - addressed in versions 4.19.90-2602.1.0.0361, 5.10.0-301.0.0.204, 6.6.0-144.0.0.127, 6.6.0-144.0.0.139, 6.6.0-144.0.0.140
kernel-debugsource - addressed in versions 4.19.90-2602.1.0.0361, 5.10.0-301.0.0.204, 6.6.0-144.0.0.127, 6.6.0-144.0.0.139, 6.6.0-144.0.0.140
python3-perf-debuginfo - addressed in versions 4.19.90-2602.1.0.0361, 5.10.0-301.0.0.204, 6.6.0-144.0.0.127, 6.6.0-144.0.0.139, 6.6.0-144.0.0.140
python3-perf - addressed in versions 4.19.90-2602.1.0.0361, 5.10.0-301.0.0.204, 6.6.0-144.0.0.127, 6.6.0-144.0.0.139, 6.6.0-144.0.0.140
python2-perf - update to 4.19.90-2602.1.0.0361
perf-debuginfo - addressed in versions 4.19.90-2602.1.0.0361, 5.10.0-301.0.0.204, 6.6.0-144.0.0.127, 6.6.0-144.0.0.139, 6.6.0-144.0.0.140
perf - addressed in versions 4.19.90-2602.1.0.0361, 5.10.0-301.0.0.204, 6.6.0-144.0.0.127, 6.6.0-144.0.0.139, 6.6.0-144.0.0.140
kernel-tools-devel - addressed in versions 4.19.90-2602.1.0.0361, 5.10.0-301.0.0.204, 6.6.0-144.0.0.127, 6.6.0-144.0.0.139, 6.6.0-144.0.0.140
kernel-tools-debuginfo - addressed in versions 4.19.90-2602.1.0.0361, 5.10.0-301.0.0.204, 6.6.0-144.0.0.127, 6.6.0-144.0.0.139, 6.6.0-144.0.0.140
kernel-tools - addressed in versions 4.19.90-2602.1.0.0361, 5.10.0-301.0.0.204, 6.6.0-144.0.0.127, 6.6.0-144.0.0.139, 6.6.0-144.0.0.140
kernel-devel - addressed in versions 4.19.90-2602.1.0.0361, 5.10.0-301.0.0.204, 6.6.0-144.0.0.127, 6.6.0-144.0.0.139, 6.6.0-144.0.0.140
python2-perf-debuginfo - update to 4.19.90-2602.1.0.0361
kernel-headers - addressed in versions 5.10.0-301.0.0.204, 6.6.0-144.0.0.127, 6.6.0-144.0.0.139, 6.6.0-144.0.0.140
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, 6.17.0-14.14, 6.17.0-1006.7, 6.17.0-1008.8
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
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, 6.17.0-1008.8
linux-azure-5.15 (Ubuntu package) - update to 5.15.0-1110.119~20.04.1
gfs2-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-devel - update to 6.4.0-150700.7.28.1
kernel-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-rt-devel-debuginfo - update to 6.4.0-150700.7.28.1
dlm-kmp-rt - update to 6.4.0-150700.7.28.1
kernel-devel-rt - update to 6.4.0-150700.7.28.1
kernel-source-rt - update to 6.4.0-150700.7.28.1
kernel-rt - update to 6.4.0-150700.7.28.1
kernel-azure-devel-debuginfo - 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-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 - update to 6.4.0-150700.20.24.1
kernel-syms-azure - update to 6.4.0-150700.20.24.1
kernel-azure-devel - update to 6.4.0-150700.20.24.1
kernel-default-extra - update to 6.4.0-150700.53.28.1
kernel-64kb - 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-obs-build - update to 6.4.0-150700.53.28.1
kernel-obs-build-debugsource - update to 6.4.0-150700.53.28.1
kernel-default-livepatch - 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-debuginfo - update to 6.4.0-150700.53.28.1
kernel-docs - 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 - update to 6.4.0-150700.53.28.1
kernel-zfcpdump-debuginfo - update to 6.4.0-150700.53.28.1
kernel-zfcpdump-debugsource - update to 6.4.0-150700.53.28.1
kernel-extra-modules - update to 6.6.0-144.0.0.140
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-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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