On-Chip Debug and Test Interface With Improper Access Control in Linux kernel - CVE-2026-23292

Vulnerability identifier: #VU124569

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-2026-23292

CWE-ID: CWE-1191

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper locking mechanism in the SCSI target subsystem when handling configuration file writes. A local user can provide a specially crafted configuration input to cause recursive semaphore locking, leading to a system crash or hang.

Exploitation requires access to the target's configuration filesystem (configfs) and the ability to write to the db_root parameter. No additional privileges beyond standard configfs access are required.

Linux kernel
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server 12 SP5
Debian Linux
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
SUSE Linux Enterprise Live Patching
SUSE Real Time Module
Basesystem Module
Development Tools Module
Legacy Module
Public Cloud Module
Ubuntu
openEuler
kgraft-patch-4_12_14-122_310-default
kernel-livepatch-6_4_0-150700_7_37-rt
kernel-livepatch-6_4_0-150700_7_37-rt-debuginfo
kernel-livepatch-SLE15-SP7-RT_Update_11-debugsource
kernel-livepatch-6_4_0-150700_53_37-default-debuginfo
kernel-livepatch-6_4_0-150700_53_37-default
kernel-livepatch-SLE15-SP7_Update_11-debugsource
ocfs2-kmp-default
kernel-default-kgraft-devel
kernel-default-kgraft
kernel-default-devel-debuginfo
kernel-default-man
kernel-default-base
kernel-default-debugsource
dlm-kmp-default
cluster-md-kmp-default
ocfs2-kmp-default-debuginfo
kernel-default-base-debuginfo
kernel-macros
kernel-default-devel
dlm-kmp-default-debuginfo
cluster-md-kmp-default-debuginfo
kernel-syms
gfs2-kmp-default
gfs2-kmp-default-debuginfo
kernel-default-debuginfo
kernel-default
kernel-source
kernel-devel
linux (Debian package)
kernel-syms-rt
kernel-source-rt
dlm-kmp-rt
dlm-kmp-rt-debuginfo
cluster-md-kmp-rt-debuginfo
kernel-rt-devel-debuginfo
kernel-rt-devel
ocfs2-kmp-rt
kernel-rt-debugsource
ocfs2-kmp-rt-debuginfo
cluster-md-kmp-rt
gfs2-kmp-rt
kernel-rt-debuginfo
gfs2-kmp-rt-debuginfo
kernel-devel-rt
kernel-rt
kernel-64kb-debugsource
kernel-64kb-devel
kernel-64kb-debuginfo
kernel-64kb-devel-debuginfo
kernel-64kb
kernel-default-livepatch
kernel-azure-devel-debuginfo
kernel-zfcpdump
kernel-zfcpdump-debugsource
kernel-zfcpdump-debuginfo
kernel-docs
kernel-obs-build
kernel-obs-build-debugsource
reiserfs-kmp-default-debuginfo
reiserfs-kmp-default
kernel-azure
kernel-default-livepatch-devel
kernel-azure-debuginfo
kernel-azure-debugsource
kernel-azure-devel
kernel-default-extra-debuginfo
kernel-default-extra
perf-debuginfo
kernel
bpftool
bpftool-debuginfo
kernel-debuginfo
kernel-debugsource
kernel-headers
kernel-tools
kernel-tools-debuginfo
kernel-tools-devel
perf
python3-perf
python3-perf-debuginfo
linux (Ubuntu package)
linux-fips (Ubuntu package)
linux-hwe-6.8 (Ubuntu package)
linux-ibm (Ubuntu package)
linux-oracle-6.8 (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-aws-6.8 (Ubuntu package)
linux-aws (Ubuntu package)
linux-raspi (Ubuntu package)
linux-azure-fde (Ubuntu package)
linux-azure-fde-6.8 (Ubuntu package)
linux-azure (Ubuntu package)
linux-azure-fips (Ubuntu package)
linux-gcp-fips (Ubuntu package)

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
kgraft-patch-4_12_14-122_310-default - update to 1-8.3.1
kernel-livepatch-6_4_0-150700_7_37-rt - update to 1-150700.1.3.1
kernel-livepatch-6_4_0-150700_7_37-rt-debuginfo - update to 1-150700.1.3.1
kernel-livepatch-SLE15-SP7-RT_Update_11-debugsource - update to 1-150700.1.3.1
kernel-livepatch-6_4_0-150700_53_37-default-debuginfo - update to 1-150700.15.3.1
kernel-livepatch-6_4_0-150700_53_37-default - update to 1-150700.15.3.1
kernel-livepatch-SLE15-SP7_Update_11-debugsource - update to 1-150700.15.3.1
ocfs2-kmp-default - addressed in versions 4.12.14-122.310.1, 6.4.0-150700.53.37.1
kernel-default-kgraft-devel - update to 4.12.14-122.310.1
kernel-default-kgraft - update to 4.12.14-122.310.1
kernel-default-devel-debuginfo - addressed in versions 4.12.14-122.310.1, 6.4.0-150700.53.37.1
kernel-default-man - update to 4.12.14-122.310.1
kernel-default-base - addressed in versions 4.12.14-122.310.1, 6.4.0-150700.53.37.1.150700.17.25.1
kernel-default-debugsource - addressed in versions 4.12.14-122.310.1, 6.4.0-150700.53.37.1
dlm-kmp-default - addressed in versions 4.12.14-122.310.1, 6.4.0-150700.53.37.1
cluster-md-kmp-default - addressed in versions 4.12.14-122.310.1, 6.4.0-150700.53.37.1
ocfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.310.1, 6.4.0-150700.53.37.1
kernel-default-base-debuginfo - update to 4.12.14-122.310.1
kernel-macros - addressed in versions 4.12.14-122.310.1, 6.4.0-150700.53.37.1
kernel-default-devel - addressed in versions 4.12.14-122.310.1, 6.4.0-150700.53.37.1
dlm-kmp-default-debuginfo - addressed in versions 4.12.14-122.310.1, 6.4.0-150700.53.37.1
cluster-md-kmp-default-debuginfo - addressed in versions 4.12.14-122.310.1, 6.4.0-150700.53.37.1
kernel-syms - addressed in versions 4.12.14-122.310.1, 6.4.0-150700.53.37.1
gfs2-kmp-default - addressed in versions 4.12.14-122.310.1, 6.4.0-150700.53.37.1
gfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.310.1, 6.4.0-150700.53.37.1
kernel-default-debuginfo - addressed in versions 4.12.14-122.310.1, 6.4.0-150700.53.37.1
kernel-default - addressed in versions 4.12.14-122.310.1, 6.4.0-150700.53.37.1
kernel-source - addressed in versions 4.12.14-122.310.1, 6.4.0-150700.53.37.1
kernel-devel - addressed in versions 4.12.14-122.310.1, 6.4.0-150700.53.37.1
linux (Debian package) - addressed in versions 6.1.170-1, 6.12.85-1
kernel-syms-rt - update to 6.4.0-150700.7.37.1
kernel-source-rt - update to 6.4.0-150700.7.37.2
dlm-kmp-rt - update to 6.4.0-150700.7.37.2
dlm-kmp-rt-debuginfo - update to 6.4.0-150700.7.37.2
cluster-md-kmp-rt-debuginfo - update to 6.4.0-150700.7.37.2
kernel-rt-devel-debuginfo - update to 6.4.0-150700.7.37.2
kernel-rt-devel - update to 6.4.0-150700.7.37.2
ocfs2-kmp-rt - update to 6.4.0-150700.7.37.2
kernel-rt-debugsource - update to 6.4.0-150700.7.37.2
ocfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.37.2
cluster-md-kmp-rt - update to 6.4.0-150700.7.37.2
gfs2-kmp-rt - update to 6.4.0-150700.7.37.2
kernel-rt-debuginfo - update to 6.4.0-150700.7.37.2
gfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.37.2
kernel-devel-rt - update to 6.4.0-150700.7.37.2
kernel-rt - update to 6.4.0-150700.7.37.2
kernel-64kb-debugsource - update to 6.4.0-150700.53.37.1
kernel-64kb-devel - update to 6.4.0-150700.53.37.1
kernel-64kb-debuginfo - update to 6.4.0-150700.53.37.1
kernel-64kb-devel-debuginfo - update to 6.4.0-150700.53.37.1
kernel-64kb - update to 6.4.0-150700.53.37.1
kernel-default-livepatch - update to 6.4.0-150700.53.37.1
kernel-azure-devel-debuginfo - update to 6.4.0-150700.53.37.1
kernel-zfcpdump - update to 6.4.0-150700.53.37.1
kernel-zfcpdump-debugsource - update to 6.4.0-150700.53.37.1
kernel-zfcpdump-debuginfo - update to 6.4.0-150700.53.37.1
kernel-docs - update to 6.4.0-150700.53.37.1
kernel-obs-build - update to 6.4.0-150700.53.37.1
kernel-obs-build-debugsource - update to 6.4.0-150700.53.37.1
reiserfs-kmp-default-debuginfo - update to 6.4.0-150700.53.37.1
reiserfs-kmp-default - update to 6.4.0-150700.53.37.1
kernel-azure - update to 6.4.0-150700.53.37.1
kernel-default-livepatch-devel - update to 6.4.0-150700.53.37.1
kernel-azure-debuginfo - update to 6.4.0-150700.53.37.1
kernel-azure-debugsource - update to 6.4.0-150700.53.37.1
kernel-azure-devel - update to 6.4.0-150700.53.37.1
kernel-default-extra-debuginfo - update to 6.4.0-150700.53.37.1
kernel-default-extra - update to 6.4.0-150700.53.37.1
perf-debuginfo - addressed in versions 6.6.0-145.0.13.139, 6.6.0-145.1.12.150
kernel - addressed in versions 6.6.0-145.0.13.139, 6.6.0-145.1.12.150
bpftool - addressed in versions 6.6.0-145.0.13.139, 6.6.0-145.1.12.150
bpftool-debuginfo - addressed in versions 6.6.0-145.0.13.139, 6.6.0-145.1.12.150
kernel-debuginfo - addressed in versions 6.6.0-145.0.13.139, 6.6.0-145.1.12.150
kernel-debugsource - addressed in versions 6.6.0-145.0.13.139, 6.6.0-145.1.12.150
kernel-devel - addressed in versions 6.6.0-145.0.13.139, 6.6.0-145.1.12.150
kernel-headers - addressed in versions 6.6.0-145.0.13.139, 6.6.0-145.1.12.150
kernel-source - addressed in versions 6.6.0-145.0.13.139, 6.6.0-145.1.12.150
kernel-tools - addressed in versions 6.6.0-145.0.13.139, 6.6.0-145.1.12.150
kernel-tools-debuginfo - addressed in versions 6.6.0-145.0.13.139, 6.6.0-145.1.12.150
kernel-tools-devel - addressed in versions 6.6.0-145.0.13.139, 6.6.0-145.1.12.150
perf - addressed in versions 6.6.0-145.0.13.139, 6.6.0-145.1.12.150
python3-perf - addressed in versions 6.6.0-145.0.13.139, 6.6.0-145.1.12.150
python3-perf-debuginfo - addressed in versions 6.6.0-145.0.13.139, 6.6.0-145.1.12.150
linux (Ubuntu package) - addressed in versions 6.8.0-136.136, 6.8.0-1046.50, 6.8.0-1059.67, 6.8.0-1064.72, 6.8.0-1064.72~22.04.1, 6.8.1-1056.57, 6.8.1-1056.57~22.04.2
linux-fips (Ubuntu package) - addressed in versions 6.8.0-136.136+fips2, 6.8.0-136.136.2, 6.8.0-136.136.2~22.04.1, 6.8.0-1058.61
linux-hwe-6.8 (Ubuntu package) - update to 6.8.0-136.136~22.04.1
linux-ibm (Ubuntu package) - addressed in versions 6.8.0-1030.31, 6.8.0-1033.34, 6.8.0-1061.62, 6.8.0-1061.62~22.04.1
linux-oracle-6.8 (Ubuntu package) - update to 6.8.0-1058.61~22.04.1
linux-nvidia (Ubuntu package) - addressed in versions 6.8.0-1059.62, 6.8.0-1059.62.1, 6.8.0-1059.62~22.04.1
linux-aws-6.8 (Ubuntu package) - addressed in versions 6.8.0-1061.64+fips1, 6.8.0-1061.64~22.04.1
linux-aws (Ubuntu package) - update to 6.8.0-1061.64+1
linux-raspi (Ubuntu package) - addressed in versions 6.8.0-1061.65, 6.8.0-2050.52
linux-azure-fde (Ubuntu package) - update to 6.8.0-1062.69
linux-azure-fde-6.8 (Ubuntu package) - update to 6.8.0-1062.69~22.04.1
linux-azure (Ubuntu package) - addressed in versions 6.8.0-1063.71, 6.8.0-1063.71~22.04.1
linux-azure-fips (Ubuntu package) - update to 6.8.0-1063.71+fips2
linux-gcp-fips (Ubuntu package) - update to 6.8.0-1064.72+fips1

• https://git.kernel.org/stable/c/142eacb50fb903a4c10dee7e67b6e79ebb36a582
• https://git.kernel.org/stable/c/14d4ac19d1895397532eec407433c5d74d9da53b
• https://git.kernel.org/stable/c/3161ef61f121d4573cad5b57c92188dcd9b284b3
• https://git.kernel.org/stable/c/4fcfa424a581d823cb1a9676e3eefe6ca17e453a
• https://git.kernel.org/stable/c/9a5641024fbfd9b24fe65984ad85fea10a3ae438
• https://git.kernel.org/stable/c/e8ef82cb6443d5f3260b1b830e17f03dda4229ea

• On-Chip Debug and Test Interface With Improper Access Control in Linux kernel target driver
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• Debian update for linux
• Debian update for linux
• openEuler 24.03 LTS SP1 update for kernel
• SUSE update for the Linux Kernel
• openEuler 24.03 LTS update for kernel
• Ubuntu update for linux
• Ubuntu update for linux-gcp-fips
• Ubuntu update for linux-oracle-6.8
• Ubuntu update for linux-fips
• Ubuntu update for linux-nvidia
• Ubuntu update for linux-azure-fde-6.8
• Ubuntu update for linux-azure-fips
• Ubuntu update for linux-azure-fde
• Ubuntu update for linux-azure
• Ubuntu update for linux-aws
• Ubuntu update for linux-hwe-6.8
• Ubuntu update for linux-aws-6.8
• Ubuntu update for linux-ibm
• Ubuntu update for linux-raspi