NULL pointer dereference in Linux kernel - CVE-2025-68335

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Main Vulnerability Database Vulnerabilities #VU120234

NULL pointer dereference in Linux kernel - CVE-2025-68335

Published: December 22, 2025


Vulnerability identifier: #VU120234
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-2025-68335
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 pcl818_detach() function in drivers/comedi/drivers/pcl818.c. A local user can perform a denial of service (DoS) attack.


Affected software

Linux kernel
Debian Linux
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Live Patching
SUSE Real Time Module
Public Cloud Module
Legacy Module
Development Tools Module
Basesystem Module
openSUSE Leap
Ubuntu
kernel-livepatch-6_4_0-150600_23_84-default-debuginfo
kernel-livepatch-SLE15-SP6_Update_19-debugsource
kernel-livepatch-6_4_0-150600_23_84-default
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-6_4_0-150700_53_28-default-debuginfo
kernel-livepatch-SLE15-SP7_Update_8-debugsource
kernel-livepatch-6_4_0-150700_53_28-default
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)
linux (Debian package)
kselftests-kmp-64kb
reiserfs-kmp-64kb-debuginfo
dtb-lg
dtb-broadcom
cluster-md-kmp-64kb
kernel-64kb-debugsource
kernel-64kb-extra
dtb-apm
kselftests-kmp-64kb-debuginfo
reiserfs-kmp-64kb
dtb-apple
dlm-kmp-64kb-debuginfo
kernel-64kb-devel
dtb-mediatek
dtb-arm
gfs2-kmp-64kb-debuginfo
kernel-64kb-optional
dtb-renesas
kernel-64kb
dtb-qcom
dtb-amd
dlm-kmp-64kb
kernel-64kb-debuginfo
kernel-64kb-extra-debuginfo
dtb-xilinx
kernel-64kb-devel-debuginfo
kernel-64kb-optional-debuginfo
dtb-sprd
gfs2-kmp-64kb
dtb-hisilicon
dtb-allwinner
dtb-rockchip
dtb-freescale
dtb-cavium
ocfs2-kmp-64kb-debuginfo
kernel-default-vdso
kernel-default-debuginfo
kernel-default-devel-debuginfo
kselftests-kmp-default
ocfs2-kmp-default-debuginfo
kernel-syms
kernel-obs-build-debugsource
gfs2-kmp-default-debuginfo
kernel-default-debugsource
cluster-md-kmp-default
kernel-kvmsmall-debugsource
kernel-kvmsmall-debuginfo
kernel-kvmsmall-devel-debuginfo
kernel-kvmsmall-devel
kernel-debug-vdso
kernel-debug-vdso-debuginfo
dtb-socionext
kernel-default-vdso-debuginfo
kernel-kvmsmall-vdso
kernel-kvmsmall-vdso-debuginfo
kernel-debug-devel-debuginfo
kernel-debug-debugsource
kernel-debug-debuginfo
kernel-debug-devel
kernel-debug
kernel-macros
kernel-source
kernel-source-vanilla
kernel-devel
kernel-docs-html
kernel-docs
kernel-zfcpdump
reiserfs-kmp-default
kernel-default-optional-debuginfo
kernel-default-optional
cluster-md-kmp-default-debuginfo
dlm-kmp-default-debuginfo
kernel-obs-qa
kernel-default-livepatch
gfs2-kmp-default
reiserfs-kmp-default-debuginfo
kernel-default
kernel-default-livepatch-devel
kernel-kvmsmall
dlm-kmp-default
kernel-zfcpdump-debuginfo
kernel-zfcpdump-debugsource
dtb-aarch64
dtb-amlogic
dtb-exynos
dtb-altera
dtb-amazon
dtb-marvell
dtb-nvidia
cluster-md-kmp-64kb-debuginfo
ocfs2-kmp-64kb
kernel-default-extra
kernel-obs-build
kernel-default-extra-debuginfo
ocfs2-kmp-default
kselftests-kmp-default-debuginfo
kernel-default-devel
kernel-default-base
kernel-default-base-rebuild
cluster-md-kmp-rt-debuginfo
kernel-rt
kernel-source-rt
kernel-devel-rt
dlm-kmp-rt
kernel-rt-debugsource
gfs2-kmp-rt-debuginfo
gfs2-kmp-rt
kernel-syms-rt
ocfs2-kmp-rt
kernel-rt-devel
kernel-rt-debuginfo
ocfs2-kmp-rt-debuginfo
cluster-md-kmp-rt
kernel-rt-devel-debuginfo
dlm-kmp-rt-debuginfo
kernel-devel-azure
kernel-source-azure
kernel-azure-debugsource
kernel-azure-debuginfo
kernel-azure-devel
kernel-azure-devel-debuginfo
kernel-syms-azure
kernel-azure
linux-hwe-6.8 (Ubuntu package)
linux-nvidia-tegra (Ubuntu package)
linux-xilinx (Ubuntu package)
linux-oracle (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-nvidia-lowlatency (Ubuntu package)
linux-gcp-6.8 (Ubuntu package)
linux-raspi-realtime (Ubuntu package)
linux-gcp-6.17 (Ubuntu package)
linux-realtime-6.17 (Ubuntu package)
linux-oem-6.17 (Ubuntu package)

How to mitigate CVE-2025-68335

Install update from vendor's repository.

kernel-livepatch-6_4_0-150600_23_84-default-debuginfo - 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 - update to 1-150600.13.3.1
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_7_28-rt-debuginfo - update to 1-150700.1.3.1
kernel-livepatch-6_4_0-150700_53_28-default-debuginfo - 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 - update to 1-150700.15.3.1
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, 6.8.0-110.110+fips2, 6.8.0-1052.55+fips1, 6.8.0-1054.57+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, 6.8.0-110.110, 6.8.0-110.110.1, 6.8.0-110.110.1~22.04.1, 6.8.0-1037.40, 6.8.0-1050.56, 6.8.0-1051.51, 6.8.0-1052.55~22.04.1, 6.8.0-1054.57, 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, 6.17.0-1010.10
linux-realtime (Ubuntu package) - addressed in versions 5.15.0.1102.106, 5.15.0-1102.111, 6.8.1-1047.48
linux-azure-fips (Ubuntu package) - addressed in versions 5.15.0.1109.94, 5.15.0-1109.118+fips1, 6.8.0-1054.60+fips1
linux-azure (Ubuntu package) - addressed in versions 5.15.0.1109.107, 5.15.0-1109.118, 6.8.0-1054.60, 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
linux (Debian package) - update to 6.1.162-1
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
dtb-lg - update to 6.4.0-150600.23.84.1
dtb-broadcom - update to 6.4.0-150600.23.84.1
cluster-md-kmp-64kb - 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
kernel-64kb-extra - update to 6.4.0-150600.23.84.1
dtb-apm - update to 6.4.0-150600.23.84.1
kselftests-kmp-64kb-debuginfo - update to 6.4.0-150600.23.84.1
reiserfs-kmp-64kb - update to 6.4.0-150600.23.84.1
dtb-apple - update to 6.4.0-150600.23.84.1
dlm-kmp-64kb-debuginfo - 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
dtb-mediatek - update to 6.4.0-150600.23.84.1
dtb-arm - update to 6.4.0-150600.23.84.1
gfs2-kmp-64kb-debuginfo - update to 6.4.0-150600.23.84.1
kernel-64kb-optional - update to 6.4.0-150600.23.84.1
dtb-renesas - 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-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-debuginfo - 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-rockchip - 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-default-vdso - update to 6.4.0-150600.23.84.1
kernel-default-debuginfo - addressed in versions 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
kernel-default-devel-debuginfo - 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
ocfs2-kmp-default-debuginfo - addressed in versions 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
kernel-syms - addressed in versions 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
kernel-obs-build-debugsource - addressed in versions 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
gfs2-kmp-default-debuginfo - addressed in versions 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
kernel-default-debugsource - addressed in versions 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
cluster-md-kmp-default - 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-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
dtb-socionext - 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-debugsource - 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-macros - addressed in versions 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
kernel-source - addressed in versions 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
kernel-source-vanilla - update to 6.4.0-150600.23.84.1
kernel-devel - addressed in versions 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
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-zfcpdump - addressed in versions 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
reiserfs-kmp-default - addressed in versions 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
kernel-default-optional-debuginfo - update to 6.4.0-150600.23.84.1
kernel-default-optional - update to 6.4.0-150600.23.84.1
cluster-md-kmp-default-debuginfo - addressed in versions 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
dlm-kmp-default-debuginfo - addressed in versions 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
kernel-obs-qa - update to 6.4.0-150600.23.84.1
kernel-default-livepatch - addressed in versions 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
gfs2-kmp-default - addressed in versions 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
reiserfs-kmp-default-debuginfo - addressed in versions 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
kernel-default - addressed in versions 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
kernel-default-livepatch-devel - 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
dlm-kmp-default - 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-debugsource - addressed in versions 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
dtb-aarch64 - update to 6.4.0-150600.23.84.1
dtb-amlogic - update to 6.4.0-150600.23.84.1
dtb-exynos - update to 6.4.0-150600.23.84.1
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
dtb-nvidia - update to 6.4.0-150600.23.84.1
cluster-md-kmp-64kb-debuginfo - update to 6.4.0-150600.23.84.1
ocfs2-kmp-64kb - update to 6.4.0-150600.23.84.1
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
ocfs2-kmp-default - 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-default-devel - addressed in versions 6.4.0-150600.23.84.1, 6.4.0-150700.53.28.1
kernel-default-base - addressed in versions 6.4.0-150600.23.84.1.150600.12.38.1, 6.4.0-150700.53.28.1.150700.17.19.1
kernel-default-base-rebuild - update to 6.4.0-150600.23.84.1.150600.12.38.1
cluster-md-kmp-rt-debuginfo - 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-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
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
cluster-md-kmp-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-debuginfo - update to 6.4.0-150700.7.28.1
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-devel - update to 6.4.0-150700.20.24.1
kernel-azure-devel-debuginfo - update to 6.4.0-150700.20.24.1
kernel-syms-azure - update to 6.4.0-150700.20.24.1
kernel-azure - update to 6.4.0-150700.20.24.1
linux-hwe-6.8 (Ubuntu package) - addressed in versions 6.8.0-110.110~22.04.1, 6.8.0-1051.51~22.04.1, 6.8.0-1052.56
linux-nvidia-tegra (Ubuntu package) - update to 6.8.0-1022.22
linux-xilinx (Ubuntu package) - update to 6.8.0-1029.30
linux-oracle (Ubuntu package) - addressed in versions 6.8.0-1049.50, 6.8.0-1049.50~22.04.1
linux-nvidia (Ubuntu package) - addressed in versions 6.8.0-1051.54, 6.8.0-1051.54~22.04.1
linux-nvidia-lowlatency (Ubuntu package) - update to 6.8.0-1051.54.1
linux-gcp-6.8 (Ubuntu package) - update to 6.8.0-1054.57~22.04.1
linux-raspi-realtime (Ubuntu package) - update to 6.8.0-2042.43
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