Improper input validation in Linux kernel - CVE-2026-46124

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Main Vulnerability Database Vulnerabilities #VU133078

Improper input validation in Linux kernel - CVE-2026-46124

Published: May 29, 2026


Vulnerability identifier: #VU133078
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-46124
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote user to disclose sensitive information.

The vulnerability exists due to improper input validation in isofs_export_iget when processing block numbers from NFS file handles. A remote user can send a crafted NFS file handle to disclose sensitive information.

Exploitation requires an authenticated NFS peer and affects isofs exported over NFS from loop-mounted images.


Affected software

Linux kernel
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Workstation Extension 15
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 Desktop 15
SUSE Linux Micro
SUSE Linux Micro Extras
SUSE Linux Enterprise Live Patching
Public Cloud Module
Legacy Module
Development Tools Module
Basesystem Module
SUSE Real Time Module
Ubuntu
kgraft-patch-4_12_14-122_320-default
kernel-livepatch-6_4_0-150700_7_62-rt-debuginfo
kernel-livepatch-SLE15-SP7-RT_Update_17-debugsource
kernel-livepatch-6_4_0-150700_7_62-rt
kernel-livepatch-6_4_0-150700_53_66-default-debuginfo
kernel-livepatch-6_4_0-150700_53_66-default
kernel-livepatch-SLE15-SP7_Update_18-debugsource
gfs2-kmp-default-debuginfo
kernel-default-kgraft-devel
kernel-default-devel-debuginfo
kernel-default-kgraft
kernel-default-man
kernel-devel
kernel-macros
kernel-source
kernel-default-devel
kernel-default-base
kernel-default-debugsource
kernel-default-base-debuginfo
cluster-md-kmp-default-debuginfo
dlm-kmp-default
kernel-default-debuginfo
dlm-kmp-default-debuginfo
ocfs2-kmp-default
gfs2-kmp-default
ocfs2-kmp-default-debuginfo
kernel-syms
cluster-md-kmp-default
kernel-default
linux (Ubuntu package)
linux-aws (Ubuntu package)
linux-nvidia-tegra (Ubuntu package)
linux-nvidia-tegra-5.15 (Ubuntu package)
linux-intel-iot-realtime (Ubuntu package)
linux-ibm-5.15 (Ubuntu package)
linux-intel-iotg (Ubuntu package)
linux-azure (Ubuntu package)
linux-azure-5.15 (Ubuntu package)
linux-gcp-5.15 (Ubuntu package)
linux-azure-fips (Ubuntu package)
linux-azure-fde (Ubuntu package)
kernel-kvmsmall-debugsource
kernel-kvmsmall-debuginfo
kernel-default-livepatch
kernel-obs-build-debugsource
kernel-kvmsmall
kernel-rt-devel-debuginfo
kernel-rt-devel
kernel-rt-debugsource
kernel-64kb
kernel-rt
kernel-obs-build
kernel-64kb-devel
kernel-64kb-debugsource
kernel-rt-livepatch
kernel-rt-debuginfo
kernel-source-rt
kernel-devel-rt
ocfs2-kmp-rt-debuginfo
cluster-md-kmp-rt
kernel-syms-rt
cluster-md-kmp-rt-debuginfo
ocfs2-kmp-rt
gfs2-kmp-rt
dlm-kmp-rt-debuginfo
gfs2-kmp-rt-debuginfo
dlm-kmp-rt
kernel-zfcpdump-debugsource
kernel-zfcpdump
kernel-64kb-debuginfo
kernel-64kb-devel-debuginfo
reiserfs-kmp-default-debuginfo
kernel-default-extra
kernel-default-extra-debuginfo
kernel-azure-devel
kernel-azure-debuginfo
kernel-azure-debugsource
kernel-azure-devel-debuginfo
kernel-azure
kernel-zfcpdump-debuginfo
kernel-default-livepatch-devel
reiserfs-kmp-default
kernel-docs
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-raspi (Ubuntu package)
linux-azure-fde-6.8 (Ubuntu package)
linux-gcp-fips (Ubuntu package)
linux-oem-7.0 (Ubuntu package)
linux-nvidia-bos (Ubuntu package)

How to mitigate CVE-2026-46124

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
kgraft-patch-4_12_14-122_320-default - update to 1-8.3.1
kernel-livepatch-6_4_0-150700_7_62-rt-debuginfo - update to 1-150700.1.3.1
kernel-livepatch-SLE15-SP7-RT_Update_17-debugsource - update to 1-150700.1.3.1
kernel-livepatch-6_4_0-150700_7_62-rt - update to 1-150700.1.3.1
kernel-livepatch-6_4_0-150700_53_66-default-debuginfo - update to 1-150700.15.3.1
kernel-livepatch-6_4_0-150700_53_66-default - update to 1-150700.15.3.1
kernel-livepatch-SLE15-SP7_Update_18-debugsource - update to 1-150700.15.3.1
gfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.320.1, 6.4.0-150700.53.66.1
kernel-default-kgraft-devel - update to 4.12.14-122.320.1
kernel-default-devel-debuginfo - addressed in versions 4.12.14-122.320.1, 6.4.0-49.1, 6.4.0-150700.53.66.1
kernel-default-kgraft - update to 4.12.14-122.320.1
kernel-default-man - update to 4.12.14-122.320.1
kernel-devel - addressed in versions 4.12.14-122.320.1, 6.4.0-49.1, 6.4.0-150700.53.66.1
kernel-macros - addressed in versions 4.12.14-122.320.1, 6.4.0-49.1, 6.4.0-150700.53.66.1
kernel-source - addressed in versions 4.12.14-122.320.1, 6.4.0-49.1, 6.4.0-150700.53.66.1
kernel-default-devel - addressed in versions 4.12.14-122.320.1, 6.4.0-49.1, 6.4.0-150700.53.66.1
kernel-default-base - addressed in versions 4.12.14-122.320.1, 6.4.0-150700.53.66.1.150700.17.39.1
kernel-default-debugsource - addressed in versions 4.12.14-122.320.1, 6.4.0-49.1, 6.4.0-150700.53.66.1
kernel-default-base-debuginfo - update to 4.12.14-122.320.1
cluster-md-kmp-default-debuginfo - addressed in versions 4.12.14-122.320.1, 6.4.0-150700.53.66.1
dlm-kmp-default - addressed in versions 4.12.14-122.320.1, 6.4.0-150700.53.66.1
kernel-default-debuginfo - addressed in versions 4.12.14-122.320.1, 6.4.0-49.1, 6.4.0-150700.53.66.1
dlm-kmp-default-debuginfo - addressed in versions 4.12.14-122.320.1, 6.4.0-150700.53.66.1
ocfs2-kmp-default - addressed in versions 4.12.14-122.320.1, 6.4.0-150700.53.66.1
gfs2-kmp-default - addressed in versions 4.12.14-122.320.1, 6.4.0-150700.53.66.1
ocfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.320.1, 6.4.0-150700.53.66.1
kernel-syms - addressed in versions 4.12.14-122.320.1, 6.4.0-49.1, 6.4.0-150700.53.66.1
cluster-md-kmp-default - addressed in versions 4.12.14-122.320.1, 6.4.0-150700.53.66.1
kernel-default - addressed in versions 4.12.14-122.320.1, 6.4.0-49.1, 6.4.0-150700.53.66.1
linux (Ubuntu package) - addressed in versions 5.15.0.184.155, 5.15.0-184.194, 5.15.0-184.194~20.04.1, 5.15.0.186.166, 5.15.0-186.196, 5.15.0-186.196~20.04.1, 5.15.0.1075.78, 5.15.0-1075.79, 5.15.0.1095.94, 5.15.0-1095.103, 5.15.0.1104.100, 5.15.0-1104.109, 5.15.0.1108.107, 5.15.0-1108.114, 5.15.0.1111.115, 5.15.0-1111.120+fips1, 5.15.0.1112.102, 5.15.0.1112.109, 5.15.0-1112.122, 5.15.0-1112.122+fips1, 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, 7.0.0-28.28, 7.0.0-28.28.1, 7.0.0-1003.4, 7.0.0-1008.8
linux-aws (Ubuntu package) - addressed in versions 5.15.0.186.109, 5.15.0-186.196+fips1, 5.15.0.1106.103, 5.15.0-1106.110, 5.15.0.1107.107, 5.15.0-1107.108, 5.15.0.1112.108, 5.15.0.1112.115, 5.15.0-1112.119, 5.15.0-1112.119+fips1, 5.15.0-1112.119~20.04.1, 6.8.0-1061.64+1, 7.0.0-1009.9, 7.0.0-1015.15
linux-nvidia-tegra (Ubuntu package) - addressed in versions 5.15.0-1053.53, 5.15.0.1053.55, 5.15.0.1064.64, 5.15.0-1064.66
linux-nvidia-tegra-5.15 (Ubuntu package) - update to 5.15.0-1064.66~20.04.1
linux-intel-iot-realtime (Ubuntu package) - addressed in versions 5.15.0-1104.106, 5.15.0.1104.108, 5.15.0-1107.113~20.04.1
linux-ibm-5.15 (Ubuntu package) - update to 5.15.0-1106.110~20.04.1
linux-intel-iotg (Ubuntu package) - addressed in versions 5.15.0.1107.106, 5.15.0-1107.113
linux-azure (Ubuntu package) - addressed in versions 5.15.0.1109.105, 5.15.0-1109.115, 5.15.0.1117.115, 5.15.0-1117.126, 6.8.0-1063.71, 6.8.0-1063.71~22.04.1, 7.0.0-1009.9, 7.0.0-1010.10
linux-azure-5.15 (Ubuntu package) - addressed in versions 5.15.0-1109.115~20.04.1, 5.15.0-1117.126~20.04.1, 5.15.0-1117.126~20.04.2
linux-gcp-5.15 (Ubuntu package) - update to 5.15.0-1112.122~20.04.1
linux-azure-fips (Ubuntu package) - addressed in versions 5.15.0.1117.102, 5.15.0-1117.126+fips1, 6.8.0-1063.71+fips2
linux-azure-fde (Ubuntu package) - addressed in versions 5.15.0-1117.126, 6.8.0-1062.69
kernel-kvmsmall-debugsource - update to 6.4.0-49.1
kernel-kvmsmall-debuginfo - update to 6.4.0-49.1
kernel-default-livepatch - addressed in versions 6.4.0-49.1, 6.4.0-150700.53.66.1
kernel-obs-build-debugsource - addressed in versions 6.4.0-49.1, 6.4.0-150700.53.66.1
kernel-kvmsmall - update to 6.4.0-49.1
kernel-rt-devel-debuginfo - addressed in versions 6.4.0-49.1, 6.4.0-150700.7.62.1
kernel-rt-devel - addressed in versions 6.4.0-49.1, 6.4.0-150700.7.62.1
kernel-rt-debugsource - addressed in versions 6.4.0-49.1, 6.4.0-150700.7.62.1
kernel-64kb - addressed in versions 6.4.0-49.1, 6.4.0-150700.53.66.1
kernel-rt - addressed in versions 6.4.0-49.1, 6.4.0-150700.7.62.1
kernel-obs-build - addressed in versions 6.4.0-49.1, 6.4.0-150700.53.66.1
kernel-64kb-devel - addressed in versions 6.4.0-49.1, 6.4.0-150700.53.66.1
kernel-64kb-debugsource - addressed in versions 6.4.0-49.1, 6.4.0-150700.53.66.1
kernel-rt-livepatch - update to 6.4.0-49.1
kernel-rt-debuginfo - addressed in versions 6.4.0-49.1, 6.4.0-150700.7.62.1
kernel-source-rt - addressed in versions 6.4.0-49.1, 6.4.0-150700.7.62.1
kernel-devel-rt - addressed in versions 6.4.0-49.1, 6.4.0-150700.7.62.1
ocfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.62.1
cluster-md-kmp-rt - update to 6.4.0-150700.7.62.1
kernel-syms-rt - update to 6.4.0-150700.7.62.1
cluster-md-kmp-rt-debuginfo - update to 6.4.0-150700.7.62.1
ocfs2-kmp-rt - update to 6.4.0-150700.7.62.1
gfs2-kmp-rt - update to 6.4.0-150700.7.62.1
dlm-kmp-rt-debuginfo - update to 6.4.0-150700.7.62.1
gfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.62.1
dlm-kmp-rt - update to 6.4.0-150700.7.62.1
kernel-zfcpdump-debugsource - update to 6.4.0-150700.53.66.1
kernel-zfcpdump - update to 6.4.0-150700.53.66.1
kernel-64kb-debuginfo - update to 6.4.0-150700.53.66.1
kernel-64kb-devel-debuginfo - update to 6.4.0-150700.53.66.1
reiserfs-kmp-default-debuginfo - update to 6.4.0-150700.53.66.1
kernel-default-extra - update to 6.4.0-150700.53.66.1
kernel-default-extra-debuginfo - update to 6.4.0-150700.53.66.1
kernel-azure-devel - update to 6.4.0-150700.53.66.1
kernel-azure-debuginfo - update to 6.4.0-150700.53.66.1
kernel-azure-debugsource - update to 6.4.0-150700.53.66.1
kernel-azure-devel-debuginfo - update to 6.4.0-150700.53.66.1
kernel-azure - update to 6.4.0-150700.53.66.1
kernel-zfcpdump-debuginfo - update to 6.4.0-150700.53.66.1
kernel-default-livepatch-devel - update to 6.4.0-150700.53.66.1
reiserfs-kmp-default - update to 6.4.0-150700.53.66.1
kernel-docs - update to 6.4.0-150700.53.66.2
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, 7.0.0-1008.8, 7.0.0-1010.10
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, 7.0.0-1016.16, 7.0.0-1016.16~24.04.1
linux-aws-6.8 (Ubuntu package) - addressed in versions 6.8.0-1061.64+fips1, 6.8.0-1061.64~22.04.1
linux-raspi (Ubuntu package) - addressed in versions 6.8.0-1061.65, 6.8.0-2050.52
linux-azure-fde-6.8 (Ubuntu package) - update to 6.8.0-1062.69~22.04.1
linux-gcp-fips (Ubuntu package) - update to 6.8.0-1064.72+fips1
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1009.9
linux-nvidia-bos (Ubuntu package) - update to 7.0.0-2016.16

External References

Related Security Bulletins