NULL pointer dereference in Linux kernel - CVE-2021-47267

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Main Vulnerability Database Vulnerabilities #VU90474

NULL pointer dereference in Linux kernel - CVE-2021-47267

Published: May 31, 2024 / Updated: May 14, 2025


Vulnerability identifier: #VU90474
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-2021-47267
CWE-ID: CWE-476
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 NULL pointer dereference within the usb_assign_descriptors() function in drivers/usb/gadget/config.c. A local user can perform a denial of service (DoS) attack.


Affected software

Linux kernel
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Real Time 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise High Availability Extension 12
SUSE Linux Enterprise Server for SAP Applications 12
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
SUSE Enterprise Storage
SUSE Linux Enterprise Live Patching
SUSE Linux Enterprise Workstation Extension 12
SUSE Linux Enterprise Server 15 SP2 Business Critical Linux
SUSE Linux Enterprise High Performance Computing 15 SP2 LTSS
SUSE Linux Enterprise Server 15 SP2 LTSS
SUSE Linux Enterprise Server 15 SP3 LTSS
SUSE Linux Enterprise Server 15 SP3 Business Critical Linux
openSUSE Leap
openEuler
kgraft-patch-4_12_14-122_222-default
kernel-livepatch-SLE15-SP2_Update_49-debugsource
kernel-livepatch-5_3_18-150200_24_194-default-debuginfo
kernel-livepatch-5_3_18-150200_24_194-default
kernel-livepatch-5_3_18-150300_59_164-preempt
kernel-livepatch-5_3_18-150300_59_164-preempt-debuginfo
kernel-livepatch-5_3_18-150300_59_164-default-debuginfo
kernel-livepatch-5_3_18-150300_59_164-default
kernel-livepatch-SLE15-SP3_Update_45-debugsource
kernel-rt-debugsource
kernel-rt-devel-debuginfo
dlm-kmp-rt-debuginfo
gfs2-kmp-rt
kernel-rt_debug-debugsource
kernel-rt
kernel-rt_debug
kernel-source-rt
kernel-rt-base
kernel-rt_debug-debuginfo
kernel-rt-base-debuginfo
kernel-rt_debug-devel
cluster-md-kmp-rt
dlm-kmp-rt
kernel-rt-devel
ocfs2-kmp-rt-debuginfo
ocfs2-kmp-rt
kernel-rt_debug-devel-debuginfo
cluster-md-kmp-rt-debuginfo
kernel-syms-rt
kernel-rt-debuginfo
gfs2-kmp-rt-debuginfo
kernel-devel-rt
kernel-azure-debugsource
kernel-source-azure
kernel-devel-azure
kernel-syms-azure
kernel-azure-base-debuginfo
kernel-azure-devel
kernel-azure-debuginfo
kernel-azure-base
kernel-azure
kernel-default-base
kernel-default
kernel-default-kgraft
ocfs2-kmp-default
dlm-kmp-default-debuginfo
gfs2-kmp-default
kernel-default-devel
kernel-devel
kernel-obs-build-debugsource
kernel-docs
kernel-source
kernel-default-kgraft-devel
kernel-default-devel-debuginfo
kernel-macros
kernel-syms
ocfs2-kmp-default-debuginfo
kernel-default-debuginfo
cluster-md-kmp-default
kernel-default-base-debuginfo
cluster-md-kmp-default-debuginfo
dlm-kmp-default
kernel-default-debugsource
gfs2-kmp-default-debuginfo
kernel-obs-build
kernel-default-man
kernel-default-extra
kernel-default-extra-debuginfo
kernel
python3-perf
bpftool
bpftool-debuginfo
kernel-debuginfo
python2-perf
kernel-debugsource
kernel-tools-debuginfo
python3-perf-debuginfo
perf-debuginfo
kernel-tools-devel
perf
kernel-tools
python2-perf-debuginfo
reiserfs-kmp-default-debuginfo
kernel-default-livepatch
kernel-default-livepatch-devel
reiserfs-kmp-default
kernel-preempt-debugsource
kernel-preempt-devel-debuginfo
kernel-preempt
kernel-preempt-debuginfo
kernel-preempt-devel
gfs2-kmp-64kb
dlm-kmp-64kb
kselftests-kmp-64kb
ocfs2-kmp-64kb
kernel-64kb-debuginfo
dtb-zte
dtb-broadcom
dtb-altera
dtb-mediatek
dtb-marvell
dtb-qcom
dlm-kmp-64kb-debuginfo
dtb-amd
kernel-64kb-devel-debuginfo
kernel-64kb-optional-debuginfo
dtb-socionext
dtb-exynos
dtb-apm
cluster-md-kmp-64kb-debuginfo
kernel-64kb
dtb-allwinner
dtb-lg
dtb-al
kernel-64kb-extra-debuginfo
dtb-amlogic
dtb-nvidia
kernel-64kb-devel
gfs2-kmp-64kb-debuginfo
kernel-64kb-extra
cluster-md-kmp-64kb
reiserfs-kmp-64kb-debuginfo
dtb-xilinx
dtb-renesas
kselftests-kmp-64kb-debuginfo
dtb-cavium
kernel-default-optional
kselftests-kmp-default
kernel-default-optional-debuginfo
kselftests-kmp-default-debuginfo
kernel-debug-devel
kernel-source-vanilla
kernel-docs-html
kernel-kvmsmall
kernel-debug
kernel-kvmsmall-devel
kernel-64kb-optional
kernel-debug-livepatch-devel
kernel-kvmsmall-debugsource
kernel-debug-debugsource
kernel-debug-debuginfo
kernel-debug-devel-debuginfo
kernel-kvmsmall-devel-debuginfo
kernel-kvmsmall-livepatch-devel
kernel-kvmsmall-debuginfo
kernel-zfcpdump-debuginfo
kernel-preempt-livepatch-devel
reiserfs-kmp-preempt
ocfs2-kmp-preempt-debuginfo
dlm-kmp-preempt-debuginfo
kernel-preempt-extra-debuginfo
kernel-zfcpdump
kernel-zfcpdump-debugsource
kernel-preempt-optional-debuginfo
dtb-aarch64
dtb-rockchip
dtb-sprd
dtb-hisilicon
dtb-arm
kernel-64kb-debugsource
kernel-64kb-livepatch-devel
reiserfs-kmp-64kb
dtb-freescale
ocfs2-kmp-64kb-debuginfo
kernel-obs-qa
cluster-md-kmp-preempt
gfs2-kmp-preempt-debuginfo
ocfs2-kmp-preempt
kselftests-kmp-preempt-debuginfo
gfs2-kmp-preempt
kselftests-kmp-preempt
cluster-md-kmp-preempt-debuginfo
reiserfs-kmp-preempt-debuginfo
kernel-preempt-optional
kernel-preempt-extra
dlm-kmp-preempt
kernel-default-base-rebuild
EMC Cloud Tiering Appliance

How to mitigate CVE-2021-47267

Install update from vendor's website.

Linux kernel - addressed in versions 4.9.273, 4.14.237, 4.19.195, 5.4.126, 5.10.44, 5.12.11, 5.13
kgraft-patch-4_12_14-122_222-default - update to 1-8.3.1
kernel-livepatch-SLE15-SP2_Update_49-debugsource - update to 1-150200.5.3.1
kernel-livepatch-5_3_18-150200_24_194-default-debuginfo - update to 1-150200.5.3.1
kernel-livepatch-5_3_18-150200_24_194-default - update to 1-150200.5.3.1
kernel-livepatch-5_3_18-150300_59_164-preempt - update to 1-150300.7.3.1
kernel-livepatch-5_3_18-150300_59_164-preempt-debuginfo - update to 1-150300.7.3.1
kernel-livepatch-5_3_18-150300_59_164-default-debuginfo - update to 1-150300.7.3.1
kernel-livepatch-5_3_18-150300_59_164-default - update to 1-150300.7.3.1
kernel-livepatch-SLE15-SP3_Update_45-debugsource - update to 1-150300.7.3.1
kernel-rt-debugsource - addressed in versions 4.12.14-10.191.1, 5.3.18-150300.172.1
kernel-rt-devel-debuginfo - update to 4.12.14-10.191.1
dlm-kmp-rt-debuginfo - update to 4.12.14-10.191.1
gfs2-kmp-rt - update to 4.12.14-10.191.1
kernel-rt_debug-debugsource - update to 4.12.14-10.191.1
kernel-rt - addressed in versions 4.12.14-10.191.1, 5.3.18-150300.172.1
kernel-rt_debug - update to 4.12.14-10.191.1
kernel-source-rt - addressed in versions 4.12.14-10.191.1, 5.3.18-150300.172.1
kernel-rt-base - update to 4.12.14-10.191.1
kernel-rt_debug-debuginfo - update to 4.12.14-10.191.1
kernel-rt-base-debuginfo - update to 4.12.14-10.191.1
kernel-rt_debug-devel - update to 4.12.14-10.191.1
cluster-md-kmp-rt - update to 4.12.14-10.191.1
dlm-kmp-rt - update to 4.12.14-10.191.1
kernel-rt-devel - update to 4.12.14-10.191.1
ocfs2-kmp-rt-debuginfo - update to 4.12.14-10.191.1
ocfs2-kmp-rt - update to 4.12.14-10.191.1
kernel-rt_debug-devel-debuginfo - update to 4.12.14-10.191.1
cluster-md-kmp-rt-debuginfo - update to 4.12.14-10.191.1
kernel-syms-rt - update to 4.12.14-10.191.1
kernel-rt-debuginfo - addressed in versions 4.12.14-10.191.1, 5.3.18-150300.172.1
gfs2-kmp-rt-debuginfo - update to 4.12.14-10.191.1
kernel-devel-rt - update to 4.12.14-10.191.1
kernel-azure-debugsource - update to 4.12.14-16.191.1
kernel-source-azure - update to 4.12.14-16.191.1
kernel-devel-azure - update to 4.12.14-16.191.1
kernel-syms-azure - update to 4.12.14-16.191.1
kernel-azure-base-debuginfo - update to 4.12.14-16.191.1
kernel-azure-devel - update to 4.12.14-16.191.1
kernel-azure-debuginfo - update to 4.12.14-16.191.1
kernel-azure-base - update to 4.12.14-16.191.1
kernel-azure - update to 4.12.14-16.191.1
kernel-default-base - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.194.1.150200.9.99.1, 5.3.18-150300.59.164.1.150300.18.96.1
kernel-default - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-default-kgraft - update to 4.12.14-122.222.1
ocfs2-kmp-default - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
dlm-kmp-default-debuginfo - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
gfs2-kmp-default - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-default-devel - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-devel - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-obs-build-debugsource - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-docs - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-source - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-default-kgraft-devel - update to 4.12.14-122.222.1
kernel-default-devel-debuginfo - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-macros - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-syms - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
ocfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-default-debuginfo - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
cluster-md-kmp-default - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-default-base-debuginfo - update to 4.12.14-122.222.1
cluster-md-kmp-default-debuginfo - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
dlm-kmp-default - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-default-debugsource - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
gfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-obs-build - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-default-man - update to 4.12.14-122.222.1
kernel-default-extra - addressed in versions 4.12.14-122.222.1, 5.3.18-150300.59.164.1
kernel-default-extra-debuginfo - addressed in versions 4.12.14-122.222.1, 5.3.18-150300.59.164.1
kernel - update to 4.19.90-2406.3.0.0282
python3-perf - update to 4.19.90-2406.3.0.0282
bpftool - update to 4.19.90-2406.3.0.0282
bpftool-debuginfo - update to 4.19.90-2406.3.0.0282
kernel-debuginfo - update to 4.19.90-2406.3.0.0282
kernel-source - update to 4.19.90-2406.3.0.0282
python2-perf - update to 4.19.90-2406.3.0.0282
kernel-debugsource - update to 4.19.90-2406.3.0.0282
kernel-tools-debuginfo - update to 4.19.90-2406.3.0.0282
python3-perf-debuginfo - update to 4.19.90-2406.3.0.0282
perf-debuginfo - update to 4.19.90-2406.3.0.0282
kernel-tools-devel - update to 4.19.90-2406.3.0.0282
perf - update to 4.19.90-2406.3.0.0282
kernel-devel - update to 4.19.90-2406.3.0.0282
kernel-tools - update to 4.19.90-2406.3.0.0282
python2-perf-debuginfo - update to 4.19.90-2406.3.0.0282
reiserfs-kmp-default-debuginfo - addressed in versions 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-default-livepatch - addressed in versions 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-default-livepatch-devel - addressed in versions 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
reiserfs-kmp-default - addressed in versions 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-preempt-debugsource - addressed in versions 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-preempt-devel-debuginfo - addressed in versions 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-preempt - addressed in versions 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-preempt-debuginfo - addressed in versions 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-preempt-devel - addressed in versions 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
gfs2-kmp-64kb - update to 5.3.18-150300.59.164.1
dlm-kmp-64kb - update to 5.3.18-150300.59.164.1
kselftests-kmp-64kb - update to 5.3.18-150300.59.164.1
ocfs2-kmp-64kb - update to 5.3.18-150300.59.164.1
kernel-64kb-debuginfo - update to 5.3.18-150300.59.164.1
dtb-zte - update to 5.3.18-150300.59.164.1
dtb-broadcom - update to 5.3.18-150300.59.164.1
dtb-altera - update to 5.3.18-150300.59.164.1
dtb-mediatek - update to 5.3.18-150300.59.164.1
dtb-marvell - update to 5.3.18-150300.59.164.1
dtb-qcom - update to 5.3.18-150300.59.164.1
dlm-kmp-64kb-debuginfo - update to 5.3.18-150300.59.164.1
dtb-amd - update to 5.3.18-150300.59.164.1
kernel-64kb-devel-debuginfo - update to 5.3.18-150300.59.164.1
kernel-64kb-optional-debuginfo - update to 5.3.18-150300.59.164.1
dtb-socionext - update to 5.3.18-150300.59.164.1
dtb-exynos - update to 5.3.18-150300.59.164.1
dtb-apm - update to 5.3.18-150300.59.164.1
cluster-md-kmp-64kb-debuginfo - update to 5.3.18-150300.59.164.1
kernel-64kb - update to 5.3.18-150300.59.164.1
dtb-allwinner - update to 5.3.18-150300.59.164.1
dtb-lg - update to 5.3.18-150300.59.164.1
dtb-al - update to 5.3.18-150300.59.164.1
kernel-64kb-extra-debuginfo - update to 5.3.18-150300.59.164.1
dtb-amlogic - update to 5.3.18-150300.59.164.1
dtb-nvidia - update to 5.3.18-150300.59.164.1
kernel-64kb-devel - update to 5.3.18-150300.59.164.1
gfs2-kmp-64kb-debuginfo - update to 5.3.18-150300.59.164.1
kernel-64kb-extra - update to 5.3.18-150300.59.164.1
cluster-md-kmp-64kb - update to 5.3.18-150300.59.164.1
reiserfs-kmp-64kb-debuginfo - update to 5.3.18-150300.59.164.1
dtb-xilinx - update to 5.3.18-150300.59.164.1
dtb-renesas - update to 5.3.18-150300.59.164.1
kselftests-kmp-64kb-debuginfo - update to 5.3.18-150300.59.164.1
dtb-cavium - update to 5.3.18-150300.59.164.1
kernel-default-optional - update to 5.3.18-150300.59.164.1
kselftests-kmp-default - update to 5.3.18-150300.59.164.1
kernel-default-optional-debuginfo - update to 5.3.18-150300.59.164.1
kselftests-kmp-default-debuginfo - update to 5.3.18-150300.59.164.1
kernel-debug-devel - update to 5.3.18-150300.59.164.1
kernel-source-vanilla - update to 5.3.18-150300.59.164.1
kernel-docs-html - update to 5.3.18-150300.59.164.1
kernel-kvmsmall - update to 5.3.18-150300.59.164.1
kernel-debug - update to 5.3.18-150300.59.164.1
kernel-kvmsmall-devel - update to 5.3.18-150300.59.164.1
kernel-64kb-optional - update to 5.3.18-150300.59.164.1
kernel-debug-livepatch-devel - update to 5.3.18-150300.59.164.1
kernel-kvmsmall-debugsource - update to 5.3.18-150300.59.164.1
kernel-debug-debugsource - update to 5.3.18-150300.59.164.1
kernel-debug-debuginfo - update to 5.3.18-150300.59.164.1
kernel-debug-devel-debuginfo - update to 5.3.18-150300.59.164.1
kernel-kvmsmall-devel-debuginfo - update to 5.3.18-150300.59.164.1
kernel-kvmsmall-livepatch-devel - update to 5.3.18-150300.59.164.1
kernel-kvmsmall-debuginfo - update to 5.3.18-150300.59.164.1
kernel-zfcpdump-debuginfo - update to 5.3.18-150300.59.164.1
kernel-preempt-livepatch-devel - update to 5.3.18-150300.59.164.1
reiserfs-kmp-preempt - update to 5.3.18-150300.59.164.1
ocfs2-kmp-preempt-debuginfo - update to 5.3.18-150300.59.164.1
dlm-kmp-preempt-debuginfo - update to 5.3.18-150300.59.164.1
kernel-preempt-extra-debuginfo - update to 5.3.18-150300.59.164.1
kernel-zfcpdump - update to 5.3.18-150300.59.164.1
kernel-zfcpdump-debugsource - update to 5.3.18-150300.59.164.1
kernel-preempt-optional-debuginfo - update to 5.3.18-150300.59.164.1
dtb-aarch64 - update to 5.3.18-150300.59.164.1
dtb-rockchip - update to 5.3.18-150300.59.164.1
dtb-sprd - update to 5.3.18-150300.59.164.1
dtb-hisilicon - update to 5.3.18-150300.59.164.1
dtb-arm - update to 5.3.18-150300.59.164.1
kernel-64kb-debugsource - update to 5.3.18-150300.59.164.1
kernel-64kb-livepatch-devel - update to 5.3.18-150300.59.164.1
reiserfs-kmp-64kb - update to 5.3.18-150300.59.164.1
dtb-freescale - update to 5.3.18-150300.59.164.1
ocfs2-kmp-64kb-debuginfo - update to 5.3.18-150300.59.164.1
kernel-obs-qa - update to 5.3.18-150300.59.164.1
cluster-md-kmp-preempt - update to 5.3.18-150300.59.164.1
gfs2-kmp-preempt-debuginfo - update to 5.3.18-150300.59.164.1
ocfs2-kmp-preempt - update to 5.3.18-150300.59.164.1
kselftests-kmp-preempt-debuginfo - update to 5.3.18-150300.59.164.1
gfs2-kmp-preempt - update to 5.3.18-150300.59.164.1
kselftests-kmp-preempt - update to 5.3.18-150300.59.164.1
cluster-md-kmp-preempt-debuginfo - update to 5.3.18-150300.59.164.1
reiserfs-kmp-preempt-debuginfo - update to 5.3.18-150300.59.164.1
kernel-preempt-optional - update to 5.3.18-150300.59.164.1
kernel-preempt-extra - update to 5.3.18-150300.59.164.1
dlm-kmp-preempt - update to 5.3.18-150300.59.164.1
kernel-default-base-rebuild - update to 5.3.18-150300.59.164.1.150300.18.96.1
EMC Cloud Tiering Appliance - update to 13.2.0.2.31

External References

Related Security Bulletins