Buffer overflow in Linux kernel - CVE-2021-47170

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Main Vulnerability Database Vulnerabilities #VU93401

Buffer overflow in Linux kernel - CVE-2021-47170

Published: June 26, 2024 / Updated: May 13, 2025


Vulnerability identifier: #VU93401
CSH Severity: Low
CVSS v4 BT: 4.3 [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/E:U/U:Clear]
CVE-ID: CVE-2021-47170
CWE-ID: CWE-119
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 memory corruption within the proc_bulk() and proc_do_submiturb() functions in drivers/usb/core/devio.c. A local user can perform a denial of service (DoS) attack.


Affected software

Linux kernel
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Manager Server
SUSE Manager Retail Branch Server
SUSE Manager Proxy
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Micro for Rancher
SUSE Enterprise Storage
SUSE Linux Enterprise Live Patching
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
openSUSE Leap
openEuler
kgraft-patch-4_12_14-122_261-default
kernel-livepatch-5_3_18-150200_24_188-default
kernel-livepatch-SLE15-SP2_Update_47-debugsource
kernel-livepatch-5_3_18-150200_24_188-default-debuginfo
kernel-livepatch-5_3_18-150300_59_158-preempt
kernel-livepatch-5_3_18-150300_59_158-default-debuginfo
kernel-livepatch-5_3_18-150300_59_158-default
kernel-livepatch-SLE15-SP3_Update_43-debugsource
kernel-livepatch-5_3_18-150300_59_158-preempt-debuginfo
kernel-macros
kernel-default-kgraft-devel
kernel-default-kgraft
kernel-default-devel-debuginfo
kernel-default-man
kernel-devel
dlm-kmp-default-debuginfo
ocfs2-kmp-default-debuginfo
dlm-kmp-default
kernel-default-debuginfo
kernel-default-debugsource
cluster-md-kmp-default
ocfs2-kmp-default
kernel-syms
kernel-source
kernel-default
cluster-md-kmp-default-debuginfo
kernel-default-base-debuginfo
kernel-default-base
kernel-default-devel
gfs2-kmp-default-debuginfo
gfs2-kmp-default
python3-perf
python2-perf-debuginfo
kernel-debugsource
python2-perf
bpftool
perf
kernel-tools-devel
perf-debuginfo
python3-perf-debuginfo
kernel-tools
bpftool-debuginfo
kernel-tools-debuginfo
kernel-debuginfo
kernel
kernel-default-livepatch-devel
kernel-obs-build
kernel-docs
reiserfs-kmp-default
reiserfs-kmp-default-debuginfo
kernel-preempt-debuginfo
kernel-obs-build-debugsource
kernel-preempt-devel
kernel-preempt-debugsource
kernel-default-livepatch
kernel-preempt-devel-debuginfo
kernel-preempt
gfs2-kmp-64kb-debuginfo
dtb-hisilicon
dtb-allwinner
kselftests-kmp-64kb
dtb-freescale
dtb-renesas
dtb-lg
dtb-exynos
dtb-altera
dtb-amd
gfs2-kmp-preempt
dtb-sprd
dtb-qcom
dtb-aarch64
kernel-zfcpdump-debugsource
kernel-zfcpdump-debuginfo
kernel-zfcpdump
kselftests-kmp-preempt-debuginfo
ocfs2-kmp-preempt-debuginfo
cluster-md-kmp-preempt
kernel-preempt-livepatch-devel
ocfs2-kmp-preempt
dtb-zte
dtb-amlogic
dtb-nvidia
dtb-apm
dlm-kmp-64kb
cluster-md-kmp-64kb-debuginfo
ocfs2-kmp-64kb-debuginfo
reiserfs-kmp-64kb
dtb-rockchip
kernel-64kb-extra
dtb-arm
kernel-64kb-optional
kernel-64kb-livepatch-devel
dlm-kmp-64kb-debuginfo
dtb-xilinx
dtb-cavium
gfs2-kmp-64kb
dtb-marvell
kernel-64kb-extra-debuginfo
ocfs2-kmp-64kb
dtb-mediatek
dtb-socionext
kernel-64kb-optional-debuginfo
reiserfs-kmp-64kb-debuginfo
cluster-md-kmp-64kb
dtb-broadcom
dtb-al
kselftests-kmp-64kb-debuginfo
kernel-source-vanilla
kernel-64kb
kernel-64kb-devel
kernel-64kb-debugsource
kernel-64kb-devel-debuginfo
kernel-64kb-debuginfo
kernel-docs-html
kernel-kvmsmall
kernel-debug
kernel-debug-debuginfo
kernel-debug-livepatch-devel
kernel-debug-devel
kernel-kvmsmall-devel
kernel-kvmsmall-livepatch-devel
kselftests-kmp-preempt
kernel-debug-devel-debuginfo
reiserfs-kmp-preempt-debuginfo
kernel-preempt-optional-debuginfo
kernel-preempt-extra-debuginfo
gfs2-kmp-preempt-debuginfo
kernel-preempt-extra
cluster-md-kmp-preempt-debuginfo
reiserfs-kmp-preempt
dlm-kmp-preempt
kernel-preempt-optional
dlm-kmp-preempt-debuginfo
kernel-obs-qa
kernel-default-optional-debuginfo
kernel-kvmsmall-debuginfo
kernel-kvmsmall-debugsource
kernel-debug-debugsource
kernel-kvmsmall-devel-debuginfo
kselftests-kmp-default
kernel-default-extra
kselftests-kmp-default-debuginfo
kernel-default-extra-debuginfo
kernel-default-optional
kernel-default-base-rebuild
kernel-source-rt
kernel-rt-debuginfo
kernel-rt-debugsource
kernel-rt

How to mitigate CVE-2021-47170

Install update from vendor's website.

Linux kernel - addressed in versions 4.19.193, 5.4.124, 5.10.42, 5.12.9, 5.13
kgraft-patch-4_12_14-122_261-default - update to 1-8.3.1
kernel-livepatch-5_3_18-150200_24_188-default - update to 1-150200.5.3.3
kernel-livepatch-SLE15-SP2_Update_47-debugsource - update to 1-150200.5.3.3
kernel-livepatch-5_3_18-150200_24_188-default-debuginfo - update to 1-150200.5.3.3
kernel-livepatch-5_3_18-150300_59_158-preempt - update to 1-150300.7.3.5
kernel-livepatch-5_3_18-150300_59_158-default-debuginfo - update to 1-150300.7.3.5
kernel-livepatch-5_3_18-150300_59_158-default - update to 1-150300.7.3.5
kernel-livepatch-SLE15-SP3_Update_43-debugsource - update to 1-150300.7.3.5
kernel-livepatch-5_3_18-150300_59_158-preempt-debuginfo - update to 1-150300.7.3.5
kernel-macros - addressed in versions 4.12.14-122.261.1, 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
kernel-default-kgraft-devel - update to 4.12.14-122.261.1
kernel-default-kgraft - update to 4.12.14-122.261.1
kernel-default-devel-debuginfo - addressed in versions 4.12.14-122.261.1, 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
kernel-default-man - update to 4.12.14-122.261.1
kernel-devel - addressed in versions 4.12.14-122.261.1, 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
dlm-kmp-default-debuginfo - addressed in versions 4.12.14-122.261.1, 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
ocfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.261.1, 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
dlm-kmp-default - addressed in versions 4.12.14-122.261.1, 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
kernel-default-debuginfo - addressed in versions 4.12.14-122.261.1, 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
kernel-default-debugsource - addressed in versions 4.12.14-122.261.1, 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
cluster-md-kmp-default - addressed in versions 4.12.14-122.261.1, 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
ocfs2-kmp-default - addressed in versions 4.12.14-122.261.1, 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
kernel-syms - addressed in versions 4.12.14-122.261.1, 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
kernel-source - addressed in versions 4.12.14-122.261.1, 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
kernel-default - addressed in versions 4.12.14-122.261.1, 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
cluster-md-kmp-default-debuginfo - addressed in versions 4.12.14-122.261.1, 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
kernel-default-base-debuginfo - update to 4.12.14-122.261.1
kernel-default-base - addressed in versions 4.12.14-122.261.1, 5.3.18-150200.24.188.1.150200.9.95.3, 5.3.18-150300.59.158.1.150300.18.92.5
kernel-default-devel - addressed in versions 4.12.14-122.261.1, 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
gfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.261.1, 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
gfs2-kmp-default - addressed in versions 4.12.14-122.261.1, 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
python3-perf - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
kernel-source - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
python2-perf-debuginfo - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
kernel-debugsource - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
python2-perf - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
bpftool - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
perf - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
kernel-tools-devel - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
perf-debuginfo - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
python3-perf-debuginfo - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
kernel-tools - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
bpftool-debuginfo - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
kernel-tools-debuginfo - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
kernel-debuginfo - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
kernel-devel - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
kernel - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
kernel-default-livepatch-devel - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
kernel-obs-build - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
kernel-docs - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
reiserfs-kmp-default - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
reiserfs-kmp-default-debuginfo - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
kernel-preempt-debuginfo - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
kernel-obs-build-debugsource - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
kernel-preempt-devel - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
kernel-preempt-debugsource - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
kernel-default-livepatch - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
kernel-preempt-devel-debuginfo - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
kernel-preempt - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
gfs2-kmp-64kb-debuginfo - update to 5.3.18-150300.59.158.1
dtb-hisilicon - update to 5.3.18-150300.59.158.1
dtb-allwinner - update to 5.3.18-150300.59.158.1
kselftests-kmp-64kb - update to 5.3.18-150300.59.158.1
dtb-freescale - update to 5.3.18-150300.59.158.1
dtb-renesas - update to 5.3.18-150300.59.158.1
dtb-lg - update to 5.3.18-150300.59.158.1
dtb-exynos - update to 5.3.18-150300.59.158.1
dtb-altera - update to 5.3.18-150300.59.158.1
dtb-amd - update to 5.3.18-150300.59.158.1
gfs2-kmp-preempt - update to 5.3.18-150300.59.158.1
dtb-sprd - update to 5.3.18-150300.59.158.1
dtb-qcom - update to 5.3.18-150300.59.158.1
dtb-aarch64 - update to 5.3.18-150300.59.158.1
kernel-zfcpdump-debugsource - update to 5.3.18-150300.59.158.1
kernel-zfcpdump-debuginfo - update to 5.3.18-150300.59.158.1
kernel-zfcpdump - update to 5.3.18-150300.59.158.1
kselftests-kmp-preempt-debuginfo - update to 5.3.18-150300.59.158.1
ocfs2-kmp-preempt-debuginfo - update to 5.3.18-150300.59.158.1
cluster-md-kmp-preempt - update to 5.3.18-150300.59.158.1
kernel-preempt-livepatch-devel - update to 5.3.18-150300.59.158.1
ocfs2-kmp-preempt - update to 5.3.18-150300.59.158.1
dtb-zte - update to 5.3.18-150300.59.158.1
dtb-amlogic - update to 5.3.18-150300.59.158.1
dtb-nvidia - update to 5.3.18-150300.59.158.1
dtb-apm - update to 5.3.18-150300.59.158.1
dlm-kmp-64kb - update to 5.3.18-150300.59.158.1
cluster-md-kmp-64kb-debuginfo - update to 5.3.18-150300.59.158.1
ocfs2-kmp-64kb-debuginfo - update to 5.3.18-150300.59.158.1
reiserfs-kmp-64kb - update to 5.3.18-150300.59.158.1
dtb-rockchip - update to 5.3.18-150300.59.158.1
kernel-64kb-extra - update to 5.3.18-150300.59.158.1
dtb-arm - update to 5.3.18-150300.59.158.1
kernel-64kb-optional - update to 5.3.18-150300.59.158.1
kernel-64kb-livepatch-devel - update to 5.3.18-150300.59.158.1
dlm-kmp-64kb-debuginfo - update to 5.3.18-150300.59.158.1
dtb-xilinx - update to 5.3.18-150300.59.158.1
dtb-cavium - update to 5.3.18-150300.59.158.1
gfs2-kmp-64kb - update to 5.3.18-150300.59.158.1
dtb-marvell - update to 5.3.18-150300.59.158.1
kernel-64kb-extra-debuginfo - update to 5.3.18-150300.59.158.1
ocfs2-kmp-64kb - update to 5.3.18-150300.59.158.1
dtb-mediatek - update to 5.3.18-150300.59.158.1
dtb-socionext - update to 5.3.18-150300.59.158.1
kernel-64kb-optional-debuginfo - update to 5.3.18-150300.59.158.1
reiserfs-kmp-64kb-debuginfo - update to 5.3.18-150300.59.158.1
cluster-md-kmp-64kb - update to 5.3.18-150300.59.158.1
dtb-broadcom - update to 5.3.18-150300.59.158.1
dtb-al - update to 5.3.18-150300.59.158.1
kselftests-kmp-64kb-debuginfo - update to 5.3.18-150300.59.158.1
kernel-source-vanilla - update to 5.3.18-150300.59.158.1
kernel-64kb - update to 5.3.18-150300.59.158.1
kernel-64kb-devel - update to 5.3.18-150300.59.158.1
kernel-64kb-debugsource - update to 5.3.18-150300.59.158.1
kernel-64kb-devel-debuginfo - update to 5.3.18-150300.59.158.1
kernel-64kb-debuginfo - update to 5.3.18-150300.59.158.1
kernel-docs-html - update to 5.3.18-150300.59.158.1
kernel-kvmsmall - update to 5.3.18-150300.59.158.1
kernel-debug - update to 5.3.18-150300.59.158.1
kernel-debug-debuginfo - update to 5.3.18-150300.59.158.1
kernel-debug-livepatch-devel - update to 5.3.18-150300.59.158.1
kernel-debug-devel - update to 5.3.18-150300.59.158.1
kernel-kvmsmall-devel - update to 5.3.18-150300.59.158.1
kernel-kvmsmall-livepatch-devel - update to 5.3.18-150300.59.158.1
kselftests-kmp-preempt - update to 5.3.18-150300.59.158.1
kernel-debug-devel-debuginfo - update to 5.3.18-150300.59.158.1
reiserfs-kmp-preempt-debuginfo - update to 5.3.18-150300.59.158.1
kernel-preempt-optional-debuginfo - update to 5.3.18-150300.59.158.1
kernel-preempt-extra-debuginfo - update to 5.3.18-150300.59.158.1
gfs2-kmp-preempt-debuginfo - update to 5.3.18-150300.59.158.1
kernel-preempt-extra - update to 5.3.18-150300.59.158.1
cluster-md-kmp-preempt-debuginfo - update to 5.3.18-150300.59.158.1
reiserfs-kmp-preempt - update to 5.3.18-150300.59.158.1
dlm-kmp-preempt - update to 5.3.18-150300.59.158.1
kernel-preempt-optional - update to 5.3.18-150300.59.158.1
dlm-kmp-preempt-debuginfo - update to 5.3.18-150300.59.158.1
kernel-obs-qa - update to 5.3.18-150300.59.158.1
kernel-default-optional-debuginfo - update to 5.3.18-150300.59.158.1
kernel-kvmsmall-debuginfo - update to 5.3.18-150300.59.158.1
kernel-kvmsmall-debugsource - update to 5.3.18-150300.59.158.1
kernel-debug-debugsource - update to 5.3.18-150300.59.158.1
kernel-kvmsmall-devel-debuginfo - update to 5.3.18-150300.59.158.1
kselftests-kmp-default - update to 5.3.18-150300.59.158.1
kernel-default-extra - update to 5.3.18-150300.59.158.1
kselftests-kmp-default-debuginfo - update to 5.3.18-150300.59.158.1
kernel-default-extra-debuginfo - update to 5.3.18-150300.59.158.1
kernel-default-optional - update to 5.3.18-150300.59.158.1
kernel-default-base-rebuild - update to 5.3.18-150300.59.158.1.150300.18.92.5
kernel-source-rt - update to 5.3.18-150300.166.1
kernel-rt-debuginfo - update to 5.3.18-150300.166.1
kernel-rt-debugsource - update to 5.3.18-150300.166.1
kernel-rt - update to 5.3.18-150300.166.1

External References

Related Security Bulletins