Main Vulnerability Database Vulnerabilities #VU92392

Improper initialization in Linux kernel - CVE-2021-47194

Published: June 20, 2024 / Updated: May 13, 2025

Vulnerability identifier: #VU92392

CSH Severity: Low

CVSS v4.0: 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/E:U/U:Clear

CVE-ID: CVE-2021-47194

CWE-ID: CWE-665

Exploitation vector: Local access

Exploit availability: No public exploit available

Affected software:
Linux kernel
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Availability Extension 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Real Time 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Software Development Kit 12
SUSE Manager Server
SUSE Manager Retail Branch Server
SUSE Manager Proxy
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Micro for Rancher
openSUSE Leap Micro
SUSE Enterprise Storage
SUSE Linux Enterprise Workstation Extension 12
SUSE Linux Enterprise Live Patching
Ubuntu
SUSE Linux Enterprise Server 15 SP2 LTSS
SUSE Linux Enterprise Server 15 SP2 Business Critical Linux
SUSE Linux Enterprise High Performance Computing 15 SP2 LTSS
SUSE Linux Enterprise Server 15 SP3 Business Critical Linux
SUSE Linux Enterprise Server 15 SP3 LTSS
SUSE Linux Enterprise Server 15 SP4 LTSS
SUSE Linux Enterprise Desktop 15 SP4 LTSS
Basesystem Module
Legacy Module
Development Tools Module
Public Cloud Module
SUSE Real Time Module
openSUSE Leap
openEuler
RecoverPoint for Virtual Machines
linux-image-virtual-lts-xenial (Ubuntu package)
linux-image-4.4.0-257-lowlatency (Ubuntu package)
linux-image-4.4.0-257-generic (Ubuntu package)
linux-image-4.4.0-1172-aws (Ubuntu package)
linux-image-4.4.0-1135-kvm (Ubuntu package)
linux-image-aws (Ubuntu package)
linux-image-generic (Ubuntu package)
linux-image-generic-lts-xenial (Ubuntu package)
linux-image-kvm (Ubuntu package)
linux-image-lowlatency (Ubuntu package)
linux-image-lowlatency-lts-xenial (Ubuntu package)
linux-image-virtual (Ubuntu package)
linux-image-4.4.0-1134-aws (Ubuntu package)
kgraft-patch-4_12_14-122_225-default
kernel-livepatch-5_3_18-150200_24_191-default
kernel-livepatch-SLE15-SP2_Update_48-debugsource
kernel-livepatch-5_3_18-150200_24_191-default-debuginfo
kernel-livepatch-5_3_18-150300_59_161-default
kernel-livepatch-SLE15-SP3_Update_44-debugsource
kernel-livepatch-5_3_18-150300_59_161-default-debuginfo
kernel-livepatch-5_3_18-150300_59_161-preempt
kernel-livepatch-5_3_18-150300_59_161-preempt-debuginfo
kernel-livepatch-5_14_21-150400_24_119-default-debuginfo
kernel-livepatch-5_14_21-150400_24_119-default
kernel-livepatch-SLE15-SP4_Update_26-debugsource
kernel-livepatch-SLE15-SP5_Update_13-debugsource
kernel-livepatch-5_14_21-150500_55_62-default
kernel-livepatch-5_14_21-150500_55_62-default-debuginfo
kernel-livepatch-SLE15-SP5-RT_Update_14-debugsource
kernel-livepatch-5_14_21-150500_13_52-rt
kernel-livepatch-5_14_21-150500_13_52-rt-debuginfo
kernel-rt_debug
dlm-kmp-rt
kernel-rt_debug-debugsource
cluster-md-kmp-rt
kernel-rt-base
kernel-rt-base-debuginfo
cluster-md-kmp-rt-debuginfo
kernel-rt-debuginfo
gfs2-kmp-rt
kernel-rt
kernel-devel-rt
kernel-source-rt
ocfs2-kmp-rt
kernel-syms-rt
kernel-rt_debug-debuginfo
kernel-rt_debug-devel
ocfs2-kmp-rt-debuginfo
kernel-rt-debugsource
kernel-rt_debug-devel-debuginfo
kernel-rt-devel
gfs2-kmp-rt-debuginfo
dlm-kmp-rt-debuginfo
kernel-rt-devel-debuginfo
kernel-azure-debugsource
kernel-source-azure
kernel-devel-azure
kernel-azure-debuginfo
kernel-syms-azure
kernel-azure-base-debuginfo
kernel-azure-base
kernel-azure-devel
kernel-azure
cluster-md-kmp-default
kernel-default-extra-debuginfo
kernel-default-base
kernel-syms
gfs2-kmp-default-debuginfo
kernel-default
kernel-source
kernel-devel
kernel-macros
kernel-default-devel-debuginfo
kernel-default-extra
kernel-default-man
kernel-obs-build
kernel-obs-build-debugsource
kernel-default-kgraft
kernel-default-kgraft-devel
ocfs2-kmp-default
cluster-md-kmp-default-debuginfo
kernel-default-debuginfo
kernel-default-devel
gfs2-kmp-default
kernel-default-base-debuginfo
ocfs2-kmp-default-debuginfo
dlm-kmp-default
kernel-default-debugsource
dlm-kmp-default-debuginfo
kernel-docs
kernel-debuginfo
kernel-tools-devel
kernel-tools
perf-debuginfo
python3-perf-debuginfo
kernel
bpftool
python2-perf
perf
bpftool-debuginfo
python2-perf-debuginfo
kernel-debugsource
python3-perf
kernel-tools-debuginfo
kernel-preempt-devel
reiserfs-kmp-default
reiserfs-kmp-default-debuginfo
kernel-default-livepatch
kernel-preempt-debuginfo
kernel-preempt-devel-debuginfo
kernel-preempt
kernel-default-livepatch-devel
kernel-preempt-debugsource
kernel-preempt-livepatch-devel
kselftests-kmp-default
kernel-zfcpdump
kernel-default-optional-debuginfo
kernel-obs-qa
kselftests-kmp-default-debuginfo
kernel-default-optional
kernel-debug-devel
kernel-source-vanilla
kernel-kvmsmall
kernel-debug
kernel-debug-livepatch-devel
kernel-kvmsmall-devel
kernel-debug-devel-debuginfo
kernel-kvmsmall-devel-debuginfo
kernel-debug-debuginfo
kernel-kvmsmall-debuginfo
kernel-kvmsmall-livepatch-devel
kernel-kvmsmall-debugsource
kernel-debug-debugsource
dtb-allwinner
dtb-al
reiserfs-kmp-64kb-debuginfo
dtb-hisilicon
reiserfs-kmp-64kb
kselftests-kmp-64kb
dtb-xilinx
kernel-64kb-livepatch-devel
dtb-zte
dtb-freescale
dtb-lg
kernel-64kb-debugsource
gfs2-kmp-64kb
dtb-cavium
dtb-sprd
dtb-rockchip
kernel-64kb-extra
kernel-64kb-optional-debuginfo
dtb-amlogic
dlm-kmp-64kb-debuginfo
cluster-md-kmp-64kb
kernel-zfcpdump-debuginfo
kernel-zfcpdump-debugsource
dtb-aarch64
kselftests-kmp-64kb-debuginfo
kernel-64kb-optional
ocfs2-kmp-64kb
dlm-kmp-64kb
gfs2-kmp-64kb-debuginfo
kernel-preempt-optional
kernel-64kb-devel-debuginfo
dtb-nvidia
dtb-socionext
dtb-amd
dtb-altera
dtb-arm
dtb-qcom
cluster-md-kmp-64kb-debuginfo
kernel-64kb-extra-debuginfo
kselftests-kmp-preempt-debuginfo
dlm-kmp-preempt-debuginfo
kernel-64kb-devel
dlm-kmp-preempt
reiserfs-kmp-preempt
kernel-preempt-optional-debuginfo
kselftests-kmp-preempt
cluster-md-kmp-preempt
dtb-renesas
gfs2-kmp-preempt-debuginfo
ocfs2-kmp-preempt-debuginfo
reiserfs-kmp-preempt-debuginfo
kernel-preempt-extra-debuginfo
cluster-md-kmp-preempt-debuginfo
kernel-preempt-extra
gfs2-kmp-preempt
ocfs2-kmp-preempt
ocfs2-kmp-64kb-debuginfo
dtb-broadcom
dtb-apm
dtb-mediatek
kernel-64kb-debuginfo
dtb-exynos
dtb-marvell
kernel-64kb
kernel-default-base-rebuild
kernel-docs-html
dtb-amazon
dtb-apple
reiserfs-kmp-rt
kernel-rt_debug-vdso-debuginfo
kernel-rt_debug-vdso
kernel-rt_debug-livepatch-devel
kernel-rt-optional
kernel-rt-vdso-debuginfo
kernel-rt-vdso
reiserfs-kmp-rt-debuginfo
kernel-rt-livepatch-devel
kselftests-kmp-rt-debuginfo
kernel-rt-extra-debuginfo
kernel-rt-optional-debuginfo
kernel-rt-livepatch
kselftests-kmp-rt
kernel-rt-extra
kernel-azure-optional-debuginfo
dlm-kmp-azure
kselftests-kmp-azure
dlm-kmp-azure-debuginfo
kernel-azure-livepatch-devel
cluster-md-kmp-azure
kernel-azure-extra
reiserfs-kmp-azure
kernel-azure-optional
reiserfs-kmp-azure-debuginfo
kselftests-kmp-azure-debuginfo
ocfs2-kmp-azure
gfs2-kmp-azure-debuginfo
kernel-azure-extra-debuginfo
ocfs2-kmp-azure-debuginfo
cluster-md-kmp-azure-debuginfo
gfs2-kmp-azure
kernel-azure-vdso-debuginfo
kernel-azure-vdso
kernel-azure-devel-debuginfo
kernel-debug-vdso
kernel-default-vdso
kernel-kvmsmall-vdso
kernel-kvmsmall-vdso-debuginfo
kernel-default-vdso-debuginfo
kernel-debug-vdso-debuginfo
Dell EMC Storage Monitoring and Reporting (SMR)
Storage Resource Manager
EMC Cloud Tiering Appliance
Dell Secure Connect Gateway
Dell EMC VxRail Appliance

Detailed vulnerability description

The vulnerability allows a local user to execute arbitrary code.

The vulnerability exists due to improper initialization error within the cfg80211_change_iface() function in net/wireless/util.c. A local user can execute arbitrary code.

How to mitigate CVE-2021-47194

Install update from vendor's repository.

Improper initialization in Linux kernel - CVE-2021-47194

Detailed vulnerability description

How to mitigate CVE-2021-47194

Sources

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