Input validation error in Linux kernel - CVE-2026-23047

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Main Vulnerability Database Vulnerabilities #VU122393

Input validation error in Linux kernel - CVE-2026-23047

Published: February 5, 2026


Vulnerability identifier: #VU122393
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-2026-23047
CWE-ID: CWE-20
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 improper input validation within the calc_target() function in net/ceph/osd_client.c. A local user can perform a denial of service (DoS) attack.


Affected software

Linux kernel
Debian Linux
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise Live Patching
Public Cloud Module
Development Tools Module
Basesystem Module
SUSE Real Time Module
Legacy Module
Ubuntu
openEuler
kernel-livepatch-6_4_0-150700_7_37-rt-debuginfo
kernel-livepatch-6_4_0-150700_7_37-rt
kernel-livepatch-SLE15-SP7-RT_Update_11-debugsource
kernel-livepatch-SLE15-SP7_Update_11-debugsource
kernel-livepatch-6_4_0-150700_53_37-default
kernel-livepatch-6_4_0-150700_53_37-default-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)
linux (Debian package)
kernel-syms-rt
kernel-devel-rt
kernel-rt
kernel-source-rt
dlm-kmp-rt
dlm-kmp-rt-debuginfo
cluster-md-kmp-rt-debuginfo
kernel-rt-devel-debuginfo
kernel-rt-devel
kernel-rt-debugsource
ocfs2-kmp-rt-debuginfo
cluster-md-kmp-rt
gfs2-kmp-rt
kernel-rt-debuginfo
gfs2-kmp-rt-debuginfo
ocfs2-kmp-rt
kernel-zfcpdump-debugsource
kernel-zfcpdump
kernel-default-debugsource
kernel-default-devel
kernel-default-devel-debuginfo
kernel-default
kernel-64kb-debugsource
kernel-64kb-devel
kernel-64kb-debuginfo
kernel-64kb-devel-debuginfo
kernel-64kb
kernel-zfcpdump-debuginfo
ocfs2-kmp-default-debuginfo
kernel-devel
kernel-macros
kernel-default-debuginfo
kernel-default-livepatch
kernel-default-livepatch-devel
kernel-default-extra
kernel-default-extra-debuginfo
ocfs2-kmp-default
dlm-kmp-default-debuginfo
cluster-md-kmp-default
cluster-md-kmp-default-debuginfo
dlm-kmp-default
gfs2-kmp-default-debuginfo
gfs2-kmp-default
kernel-azure-devel
kernel-azure-debugsource
kernel-azure-debuginfo
kernel-azure-devel-debuginfo
kernel-azure
reiserfs-kmp-default
reiserfs-kmp-default-debuginfo
kernel-source
kernel-syms
kernel-obs-build-debugsource
kernel-obs-build
kernel-docs
kernel-default-base
kernel-tools-debuginfo
kernel-debuginfo
kernel-debugsource
kernel-headers
kernel-tools
kernel-tools-devel
perf
perf-debuginfo
python3-perf
python3-perf-debuginfo
bpftool-debuginfo
bpftool
kernel
kernel-extra-modules
linux-fips (Ubuntu package)
linux-nvidia-tegra (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-nvidia-6.8 (Ubuntu package)
linux-azure-fde-6.17 (Ubuntu package)
linux-gcp-6.17 (Ubuntu package)
linux-oracle-6.17 (Ubuntu package)
linux-azure-6.17 (Ubuntu package)
linux-oem-6.17 (Ubuntu package)
linux-nvidia-6.17 (Ubuntu package)

How to mitigate CVE-2026-23047

Install update from vendor's repository.

kernel-livepatch-6_4_0-150700_7_37-rt-debuginfo - update to 1-150700.1.3.1
kernel-livepatch-6_4_0-150700_7_37-rt - update to 1-150700.1.3.1
kernel-livepatch-SLE15-SP7-RT_Update_11-debugsource - update to 1-150700.1.3.1
kernel-livepatch-SLE15-SP7_Update_11-debugsource - 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-6_4_0-150700_53_37-default-debuginfo - 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
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, 6.8.0-117.117, 6.8.0-117.117.1, 6.8.0-117.117.1~22.04.1, 6.8.0-1041.44, 6.8.0-1054.60, 6.8.0-1055.56, 6.8.0-1055.56~22.04.1, 6.8.0-1055.58+fips1, 6.8.0-1056.60, 6.8.0-1058.61, 6.8.0-1058.61+fips1, 6.8.0-2045.46, 6.8.1-1051.52, 6.8.1-1051.52~22.04.1
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
linux-realtime (Ubuntu package) - addressed in versions 5.15.0.1102.106, 5.15.0-1102.111
linux-azure-fips (Ubuntu package) - addressed in versions 5.15.0.1109.94, 5.15.0-1109.118+fips1
linux-azure (Ubuntu package) - addressed in versions 5.15.0.1109.107, 5.15.0-1109.118, 6.8.0-1056.62
linux-azure-5.15 (Ubuntu package) - update to 5.15.0-1110.119~20.04.1
linux (Debian package) - addressed in versions 6.1.162-1, 6.12.69-1
kernel-syms-rt - update to 6.4.0-150700.7.37.1
kernel-devel-rt - update to 6.4.0-150700.7.37.2
kernel-rt - update to 6.4.0-150700.7.37.2
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
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
ocfs2-kmp-rt - update to 6.4.0-150700.7.37.2
kernel-zfcpdump-debugsource - update to 6.4.0-150700.53.37.1
kernel-zfcpdump - update to 6.4.0-150700.53.37.1
kernel-default-debugsource - update to 6.4.0-150700.53.37.1
kernel-default-devel - update to 6.4.0-150700.53.37.1
kernel-default-devel-debuginfo - update to 6.4.0-150700.53.37.1
kernel-default - update to 6.4.0-150700.53.37.1
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-zfcpdump-debuginfo - update to 6.4.0-150700.53.37.1
ocfs2-kmp-default-debuginfo - update to 6.4.0-150700.53.37.1
kernel-devel - update to 6.4.0-150700.53.37.1
kernel-macros - update to 6.4.0-150700.53.37.1
kernel-default-debuginfo - update to 6.4.0-150700.53.37.1
kernel-default-livepatch - update to 6.4.0-150700.53.37.1
kernel-default-livepatch-devel - update to 6.4.0-150700.53.37.1
kernel-default-extra - update to 6.4.0-150700.53.37.1
kernel-default-extra-debuginfo - update to 6.4.0-150700.53.37.1
ocfs2-kmp-default - update to 6.4.0-150700.53.37.1
dlm-kmp-default-debuginfo - update to 6.4.0-150700.53.37.1
cluster-md-kmp-default - update to 6.4.0-150700.53.37.1
cluster-md-kmp-default-debuginfo - update to 6.4.0-150700.53.37.1
dlm-kmp-default - update to 6.4.0-150700.53.37.1
gfs2-kmp-default-debuginfo - update to 6.4.0-150700.53.37.1
gfs2-kmp-default - update to 6.4.0-150700.53.37.1
kernel-azure-devel - update to 6.4.0-150700.53.37.1
kernel-azure-debugsource - update to 6.4.0-150700.53.37.1
kernel-azure-debuginfo - update to 6.4.0-150700.53.37.1
kernel-azure-devel-debuginfo - update to 6.4.0-150700.53.37.1
kernel-azure - update to 6.4.0-150700.53.37.1
reiserfs-kmp-default - update to 6.4.0-150700.53.37.1
reiserfs-kmp-default-debuginfo - update to 6.4.0-150700.53.37.1
kernel-source - update to 6.4.0-150700.53.37.1
kernel-syms - update to 6.4.0-150700.53.37.1
kernel-obs-build-debugsource - update to 6.4.0-150700.53.37.1
kernel-obs-build - update to 6.4.0-150700.53.37.1
kernel-docs - update to 6.4.0-150700.53.37.1
kernel-default-base - update to 6.4.0-150700.53.37.1.150700.17.25.1
kernel-tools-debuginfo - addressed in versions 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
kernel-debuginfo - addressed in versions 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
kernel-debugsource - addressed in versions 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
kernel-devel - addressed in versions 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
kernel-headers - addressed in versions 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
kernel-source - addressed in versions 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
kernel-tools - addressed in versions 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
kernel-tools-devel - addressed in versions 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
perf - addressed in versions 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
perf-debuginfo - addressed in versions 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
python3-perf - addressed in versions 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
python3-perf-debuginfo - addressed in versions 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
bpftool-debuginfo - addressed in versions 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
bpftool - addressed in versions 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
kernel - addressed in versions 6.6.0-142.0.0.124, 6.6.0-142.0.0.136, 6.6.0-142.0.0.137
kernel-extra-modules - update to 6.6.0-142.0.0.137
linux-fips (Ubuntu package) - update to 6.8.0-116.116+fips1
linux-nvidia-tegra (Ubuntu package) - update to 6.8.0-1024.24
linux-nvidia (Ubuntu package) - addressed in versions 6.8.0-1054.57, 6.8.0-1054.57.1
linux-nvidia-6.8 (Ubuntu package) - update to 6.8.0-1054.57~22.04.1
linux-azure-fde-6.17 (Ubuntu package) - update to 6.17.0-1018.18~24.04.1
linux-gcp-6.17 (Ubuntu package) - addressed in versions 6.17.0-1018.20~24.04.1, 6.17.0-1021.24~24.04.1
linux-oracle-6.17 (Ubuntu package) - addressed in versions 6.17.0-1019.19~24.04.3, 6.17.0-1019.19~24.04.3+1
linux-azure-6.17 (Ubuntu package) - update to 6.17.0-1021.21~24.04.1
linux-oem-6.17 (Ubuntu package) - update to 6.17.0-1030.30
linux-nvidia-6.17 (Ubuntu package) - update to 6.17.0-1031.31

External References

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