Use-after-free in Linux kernel - CVE-2025-40158

 

Use-after-free in Linux kernel - CVE-2025-40158

Published: November 12, 2025


Vulnerability identifier: #VU118390
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-2025-40158
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 ip6_finish_output2() and ip6_finish_output() functions in net/ipv6/ip6_output.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 15 SP6
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise Desktop 15
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat CodeReady Linux Builder for x86_64
Red Hat Enterprise Linux for Real Time for NFV
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for Real Time
Anolis OS
Red Hat CodeReady Linux Builder for Power, little endian
Red Hat CodeReady Linux Builder for ARM 64
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - TUS
SUSE Linux Enterprise Live Patching
Legacy Module
SUSE Real Time Module
Public Cloud Module
Basesystem Module
Development Tools Module
openSUSE Leap
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_290-default
kernel-livepatch-6_4_0-150600_23_84-default
kernel-livepatch-SLE15-SP6_Update_19-debugsource
kernel-livepatch-6_4_0-150600_23_84-default-debuginfo
kernel-livepatch-SLE15-SP7-RT_Update_8-debugsource
kernel-livepatch-6_4_0-150700_7_28-rt-debuginfo
kernel-livepatch-6_4_0-150700_7_28-rt
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-default-debuginfo
kernel-default-devel-debuginfo
kernel-default-kgraft
kernel-default-kgraft-devel
kernel-default-man
kernel-source
kernel-devel
kernel-macros
kernel-default
ocfs2-kmp-default
cluster-md-kmp-default
dlm-kmp-default
gfs2-kmp-default-debuginfo
kernel-syms
kernel-default-base-debuginfo
kernel-default-base
dlm-kmp-default-debuginfo
kernel-default-devel
cluster-md-kmp-default-debuginfo
ocfs2-kmp-default-debuginfo
gfs2-kmp-default
kernel-default-debugsource
kernel (Red Hat package)
kernel-rt (Red Hat package)
python3-perf
kernel-doc
kernel-abi-stablelists
perf
kernel-tools-libs-devel
kernel-tools-libs
kernel-tools
kernel-modules-extra
kernel-modules
bpftool
kernel
kernel-core
kernel-cross-headers
kernel-headers
kernel-debug
kernel-debug-core
kernel-debug-devel
kernel-debug-modules
kernel-debug-modules-extra
dtb-altera
dtb-amazon
dtb-marvell
cluster-md-kmp-64kb-debuginfo
dtb-socionext
ocfs2-kmp-64kb
dtb-arm
dtb-mediatek
kernel-64kb-devel
kselftests-kmp-64kb
reiserfs-kmp-64kb-debuginfo
kernel-obs-qa
dtb-lg
dtb-exynos
dtb-amlogic
dtb-aarch64
kernel-zfcpdump-debugsource
kernel-zfcpdump-debuginfo
kernel-zfcpdump
kernel-kvmsmall
kernel-default-livepatch-devel
dtb-nvidia
reiserfs-kmp-default-debuginfo
kernel-default-livepatch
dtb-rockchip
kernel-64kb
dtb-renesas
dtb-qcom
dtb-amd
dlm-kmp-64kb
kernel-64kb-debuginfo
kernel-64kb-extra-debuginfo
dtb-xilinx
kernel-64kb-devel-debuginfo
kernel-64kb-optional
dtb-sprd
gfs2-kmp-64kb
dtb-hisilicon
dtb-allwinner
dtb-broadcom
dtb-freescale
dtb-cavium
ocfs2-kmp-64kb-debuginfo
kernel-64kb-optional-debuginfo
gfs2-kmp-64kb-debuginfo
dlm-kmp-64kb-debuginfo
dtb-apple
reiserfs-kmp-64kb
kselftests-kmp-64kb-debuginfo
dtb-apm
kernel-64kb-extra
kernel-64kb-debugsource
cluster-md-kmp-64kb
kernel-debug-debugsource
kernel-kvmsmall-debuginfo
kernel-kvmsmall-devel-debuginfo
kernel-kvmsmall-devel
kernel-debug-vdso
kernel-debug-vdso-debuginfo
kernel-default-vdso
kernel-default-vdso-debuginfo
kernel-kvmsmall-vdso
kernel-kvmsmall-vdso-debuginfo
kernel-debug-devel-debuginfo
kernel-debug-debuginfo
kernel-source-vanilla
kernel-docs-html
kernel-docs
kernel-kvmsmall-debugsource
kernel-default-optional
kernel-default-optional-debuginfo
reiserfs-kmp-default
kernel-default-extra
kernel-obs-build
kernel-default-extra-debuginfo
kselftests-kmp-default-debuginfo
kernel-obs-build-debugsource
kselftests-kmp-default
kernel-default-base-rebuild
kernel-rt-debugsource
ocfs2-kmp-rt
kernel-syms-rt
kernel-rt-devel-debuginfo
dlm-kmp-rt
kernel-devel-rt
kernel-source-rt
kernel-rt
gfs2-kmp-rt-debuginfo
kernel-rt-devel
gfs2-kmp-rt
kernel-rt-debuginfo
ocfs2-kmp-rt-debuginfo
dlm-kmp-rt-debuginfo
cluster-md-kmp-rt
cluster-md-kmp-rt-debuginfo
kernel-azure
kernel-azure-devel-debuginfo
kernel-azure-devel
kernel-azure-debuginfo
kernel-azure-debugsource
kernel-devel-azure
kernel-source-azure
kernel-syms-azure
perf-debuginfo
bpftool-debuginfo
kernel-debuginfo
kernel-debugsource
kernel-tools-debuginfo
kernel-tools-devel
python3-perf-debuginfo
kernel-extra-modules
linux (Ubuntu package)
linux-gcp (Ubuntu package)
linux-aws (Ubuntu package)
linux-azure (Ubuntu package)
linux-oem-6.17 (Ubuntu package)

How to mitigate CVE-2025-40158

Install update from vendor's repository.

Netezza Appliance - update to 1.0.1.0 fp278500
kgraft-patch-4_12_14-122_290-default - update to 1-8.7.1
kernel-livepatch-6_4_0-150600_23_84-default - update to 1-150600.13.3.1
kernel-livepatch-SLE15-SP6_Update_19-debugsource - update to 1-150600.13.3.1
kernel-livepatch-6_4_0-150600_23_84-default-debuginfo - update to 1-150600.13.3.1
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-6_4_0-150700_7_28-rt - 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-default-debuginfo - addressed in versions 4.12.14-122.290.1, 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
kernel-default-devel-debuginfo - addressed in versions 4.12.14-122.290.1, 6.4.0-150600.23.84.1, 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-default-man - update to 4.12.14-122.290.1
kernel-source - addressed in versions 4.12.14-122.290.1, 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
kernel-devel - addressed in versions 4.12.14-122.290.1, 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
kernel-macros - addressed in versions 4.12.14-122.290.1, 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
kernel-default - addressed in versions 4.12.14-122.290.1, 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
ocfs2-kmp-default - addressed in versions 4.12.14-122.290.1, 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
cluster-md-kmp-default - addressed in versions 4.12.14-122.290.1, 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
dlm-kmp-default - addressed in versions 4.12.14-122.290.1, 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
gfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.290.1, 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
kernel-syms - addressed in versions 4.12.14-122.290.1, 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
kernel-default-base-debuginfo - update to 4.12.14-122.290.1
kernel-default-base - addressed in versions 4.12.14-122.290.1, 6.4.0-150600.23.84.1.150600.12.38.1, 6.4.0-150700.53.28.1.150700.17.19.1
dlm-kmp-default-debuginfo - addressed in versions 4.12.14-122.290.1, 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
kernel-default-devel - addressed in versions 4.12.14-122.290.1, 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
cluster-md-kmp-default-debuginfo - addressed in versions 4.12.14-122.290.1, 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
ocfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.290.1, 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
gfs2-kmp-default - addressed in versions 4.12.14-122.290.1, 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
kernel-default-debugsource - addressed in versions 4.12.14-122.290.1, 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
kernel (Red Hat package) - addressed in versions 4.18.0-305.194.1.el8_4, 4.18.0-372.195.1.el8_6, 4.18.0-477.145.1.el8_8, 4.18.0-553.104.1.el8_10, 5.14.0-284.176.1.el9_2, 5.14.0-611.30.1.el9_7
kernel-rt (Red Hat package) - addressed in versions 4.18.0-553.104.1.rt7.445.el8_10, 5.14.0-284.176.1.rt14.461.el9_2
python3-perf - update to 4.18.0-553.107.1.0.1
kernel-doc - update to 4.18.0-553.107.1.0.1
kernel-abi-stablelists - update to 4.18.0-553.107.1.0.1
perf - update to 4.18.0-553.107.1.0.1
kernel-tools-libs-devel - update to 4.18.0-553.107.1.0.1
kernel-tools-libs - update to 4.18.0-553.107.1.0.1
kernel-tools - update to 4.18.0-553.107.1.0.1
kernel-modules-extra - update to 4.18.0-553.107.1.0.1
kernel-modules - update to 4.18.0-553.107.1.0.1
kernel-devel - update to 4.18.0-553.107.1.0.1
bpftool - update to 4.18.0-553.107.1.0.1
kernel - update to 4.18.0-553.107.1.0.1
kernel-core - update to 4.18.0-553.107.1.0.1
kernel-cross-headers - update to 4.18.0-553.107.1.0.1
kernel-headers - update to 4.18.0-553.107.1.0.1
kernel-debug - update to 4.18.0-553.107.1.0.1
kernel-debug-core - update to 4.18.0-553.107.1.0.1
kernel-debug-devel - update to 4.18.0-553.107.1.0.1
kernel-debug-modules - update to 4.18.0-553.107.1.0.1
kernel-debug-modules-extra - update to 4.18.0-553.107.1.0.1
dtb-altera - update to 6.4.0-150600.23.84.1
dtb-amazon - update to 6.4.0-150600.23.84.1
dtb-marvell - update to 6.4.0-150600.23.84.1
cluster-md-kmp-64kb-debuginfo - update to 6.4.0-150600.23.84.1
dtb-socionext - update to 6.4.0-150600.23.84.1
ocfs2-kmp-64kb - update to 6.4.0-150600.23.84.1
dtb-arm - update to 6.4.0-150600.23.84.1
dtb-mediatek - update to 6.4.0-150600.23.84.1
kernel-64kb-devel - addressed in versions 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
kselftests-kmp-64kb - update to 6.4.0-150600.23.84.1
reiserfs-kmp-64kb-debuginfo - update to 6.4.0-150600.23.84.1
kernel-obs-qa - update to 6.4.0-150600.23.84.1
dtb-lg - update to 6.4.0-150600.23.84.1
dtb-exynos - update to 6.4.0-150600.23.84.1
dtb-amlogic - update to 6.4.0-150600.23.84.1
dtb-aarch64 - update to 6.4.0-150600.23.84.1
kernel-zfcpdump-debugsource - addressed in versions 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
kernel-zfcpdump-debuginfo - addressed in versions 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
kernel-zfcpdump - addressed in versions 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
kernel-kvmsmall - update to 6.4.0-150600.23.84.1
kernel-default-livepatch-devel - addressed in versions 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
dtb-nvidia - update to 6.4.0-150600.23.84.1
reiserfs-kmp-default-debuginfo - addressed in versions 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
kernel-default-livepatch - addressed in versions 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
dtb-rockchip - update to 6.4.0-150600.23.84.1
kernel-64kb - addressed in versions 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
dtb-renesas - update to 6.4.0-150600.23.84.1
dtb-qcom - update to 6.4.0-150600.23.84.1
dtb-amd - update to 6.4.0-150600.23.84.1
dlm-kmp-64kb - update to 6.4.0-150600.23.84.1
kernel-64kb-debuginfo - addressed in versions 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
kernel-64kb-extra-debuginfo - update to 6.4.0-150600.23.84.1
dtb-xilinx - update to 6.4.0-150600.23.84.1
kernel-64kb-devel-debuginfo - addressed in versions 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
kernel-64kb-optional - update to 6.4.0-150600.23.84.1
dtb-sprd - update to 6.4.0-150600.23.84.1
gfs2-kmp-64kb - update to 6.4.0-150600.23.84.1
dtb-hisilicon - update to 6.4.0-150600.23.84.1
dtb-allwinner - update to 6.4.0-150600.23.84.1
dtb-broadcom - update to 6.4.0-150600.23.84.1
dtb-freescale - update to 6.4.0-150600.23.84.1
dtb-cavium - update to 6.4.0-150600.23.84.1
ocfs2-kmp-64kb-debuginfo - update to 6.4.0-150600.23.84.1
kernel-64kb-optional-debuginfo - update to 6.4.0-150600.23.84.1
gfs2-kmp-64kb-debuginfo - update to 6.4.0-150600.23.84.1
dlm-kmp-64kb-debuginfo - update to 6.4.0-150600.23.84.1
dtb-apple - update to 6.4.0-150600.23.84.1
reiserfs-kmp-64kb - update to 6.4.0-150600.23.84.1
kselftests-kmp-64kb-debuginfo - update to 6.4.0-150600.23.84.1
dtb-apm - update to 6.4.0-150600.23.84.1
kernel-64kb-extra - update to 6.4.0-150600.23.84.1
kernel-64kb-debugsource - addressed in versions 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
cluster-md-kmp-64kb - update to 6.4.0-150600.23.84.1
kernel-debug-debugsource - update to 6.4.0-150600.23.84.1
kernel-kvmsmall-debuginfo - update to 6.4.0-150600.23.84.1
kernel-kvmsmall-devel-debuginfo - update to 6.4.0-150600.23.84.1
kernel-kvmsmall-devel - update to 6.4.0-150600.23.84.1
kernel-debug-vdso - update to 6.4.0-150600.23.84.1
kernel-debug-vdso-debuginfo - update to 6.4.0-150600.23.84.1
kernel-default-vdso - update to 6.4.0-150600.23.84.1
kernel-default-vdso-debuginfo - update to 6.4.0-150600.23.84.1
kernel-kvmsmall-vdso - update to 6.4.0-150600.23.84.1
kernel-kvmsmall-vdso-debuginfo - update to 6.4.0-150600.23.84.1
kernel-debug-devel-debuginfo - update to 6.4.0-150600.23.84.1
kernel-debug-debuginfo - update to 6.4.0-150600.23.84.1
kernel-debug-devel - update to 6.4.0-150600.23.84.1
kernel-debug - update to 6.4.0-150600.23.84.1
kernel-source-vanilla - update to 6.4.0-150600.23.84.1
kernel-docs-html - update to 6.4.0-150600.23.84.1
kernel-docs - addressed in versions 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
kernel-kvmsmall-debugsource - update to 6.4.0-150600.23.84.1
kernel-default-optional - update to 6.4.0-150600.23.84.1
kernel-default-optional-debuginfo - update to 6.4.0-150600.23.84.1
reiserfs-kmp-default - addressed in versions 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
kernel-default-extra - addressed in versions 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
kernel-obs-build - addressed in versions 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
kernel-default-extra-debuginfo - addressed in versions 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
kselftests-kmp-default-debuginfo - update to 6.4.0-150600.23.84.1
kernel-obs-build-debugsource - addressed in versions 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
kselftests-kmp-default - update to 6.4.0-150600.23.84.1
kernel-default-base-rebuild - update to 6.4.0-150600.23.84.1.150600.12.38.1
kernel-rt-debugsource - 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
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
gfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.28.1
kernel-rt-devel - update to 6.4.0-150700.7.28.1
gfs2-kmp-rt - 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
cluster-md-kmp-rt-debuginfo - update to 6.4.0-150700.7.28.1
kernel-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-devel-azure - update to 6.4.0-150700.20.24.1
kernel-source-azure - update to 6.4.0-150700.20.24.1
kernel-syms-azure - update to 6.4.0-150700.20.24.1
perf-debuginfo - addressed in versions 6.6.0-127.0.0.113, 6.6.0-127.0.0.125, 6.6.0-127.0.0.126
kernel - addressed in versions 6.6.0-127.0.0.113, 6.6.0-127.0.0.125, 6.6.0-127.0.0.126
bpftool - addressed in versions 6.6.0-127.0.0.113, 6.6.0-127.0.0.125, 6.6.0-127.0.0.126
bpftool-debuginfo - addressed in versions 6.6.0-127.0.0.113, 6.6.0-127.0.0.125, 6.6.0-127.0.0.126
kernel-debuginfo - addressed in versions 6.6.0-127.0.0.113, 6.6.0-127.0.0.125, 6.6.0-127.0.0.126
kernel-debugsource - addressed in versions 6.6.0-127.0.0.113, 6.6.0-127.0.0.125, 6.6.0-127.0.0.126
kernel-devel - addressed in versions 6.6.0-127.0.0.113, 6.6.0-127.0.0.125, 6.6.0-127.0.0.126
kernel-headers - addressed in versions 6.6.0-127.0.0.113, 6.6.0-127.0.0.125, 6.6.0-127.0.0.126
kernel-tools - addressed in versions 6.6.0-127.0.0.113, 6.6.0-127.0.0.125, 6.6.0-127.0.0.126
kernel-tools-debuginfo - addressed in versions 6.6.0-127.0.0.113, 6.6.0-127.0.0.125, 6.6.0-127.0.0.126
kernel-tools-devel - addressed in versions 6.6.0-127.0.0.113, 6.6.0-127.0.0.125, 6.6.0-127.0.0.126
perf - addressed in versions 6.6.0-127.0.0.113, 6.6.0-127.0.0.125, 6.6.0-127.0.0.126
kernel-source - addressed in versions 6.6.0-127.0.0.113, 6.6.0-127.0.0.125, 6.6.0-127.0.0.126
python3-perf - addressed in versions 6.6.0-127.0.0.113, 6.6.0-127.0.0.125, 6.6.0-127.0.0.126
python3-perf-debuginfo - addressed in versions 6.6.0-127.0.0.113, 6.6.0-127.0.0.125, 6.6.0-127.0.0.126
kernel-extra-modules - update to 6.6.0-127.0.0.126
linux (Ubuntu package) - addressed in versions 6.17.0-14.14, 6.17.0-1006.7, 6.17.0-1008.8
linux-gcp (Ubuntu package) - update to 6.17.0-1007.7
linux-aws (Ubuntu package) - update to 6.17.0-1007.7
linux-azure (Ubuntu package) - update to 6.17.0-1008.8
linux-oem-6.17 (Ubuntu package) - update to 6.17.0-1011.11

External References

Related Security Bulletins