Memory leak in Linux kernel - CVE-2021-47074

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Main Vulnerability Database Vulnerabilities #VU90027

Memory leak in Linux kernel - CVE-2021-47074

Published: May 30, 2024 / Updated: May 14, 2025


Vulnerability identifier: #VU90027
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-2021-47074
CWE-ID: CWE-401
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 leak within the nvme_loop_create_ctrl() function in drivers/nvme/target/loop.c. A local user can perform a denial of service (DoS) attack.


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 Server 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise High Availability Extension 12
SUSE Linux Enterprise Real Time 12
SUSE Linux Enterprise Software Development Kit 12
SUSE Linux Enterprise Server for SAP Applications 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 Workstation Extension 12
SUSE Linux Enterprise Live Patching
SUSE Linux Enterprise Server 15 SP2 Business Critical Linux
SUSE Linux Enterprise Server 15 SP2 LTSS
SUSE Linux Enterprise High Performance Computing 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_219-default
kernel-livepatch-5_3_18-150200_24_191-default-debuginfo
kernel-livepatch-5_3_18-150200_24_191-default
kernel-livepatch-SLE15-SP2_Update_48-debugsource
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
ocfs2-kmp-rt
dlm-kmp-rt
kernel-rt_debug-debuginfo
kernel-rt_debug-debugsource
kernel-rt-base-debuginfo
kernel-rt-base
kernel-rt-devel-debuginfo
kernel-rt-debuginfo
gfs2-kmp-rt
ocfs2-kmp-rt-debuginfo
kernel-syms-rt
kernel-rt_debug-devel-debuginfo
cluster-md-kmp-rt
dlm-kmp-rt-debuginfo
cluster-md-kmp-rt-debuginfo
kernel-rt-debugsource
kernel-rt-devel
gfs2-kmp-rt-debuginfo
kernel-rt_debug-devel
kernel-rt_debug
kernel-rt
kernel-source-rt
kernel-devel-rt
kernel-azure
kernel-azure-base
kernel-syms-azure
kernel-azure-debuginfo
kernel-azure-devel
kernel-azure-base-debuginfo
kernel-azure-debugsource
kernel-devel-azure
kernel-source-azure
kernel-default-extra
gfs2-kmp-default
kernel-default-extra-debuginfo
kernel-default-man
kernel-obs-build-debugsource
kernel-obs-build
kernel-docs
kernel-default-kgraft-devel
kernel-default-kgraft
kernel-default-devel-debuginfo
kernel-devel
kernel-source
kernel-macros
kernel-default
kernel-default-debuginfo
kernel-default-base-debuginfo
kernel-default-base
ocfs2-kmp-default
gfs2-kmp-default-debuginfo
dlm-kmp-default-debuginfo
kernel-syms
cluster-md-kmp-default
kernel-default-debugsource
dlm-kmp-default
kernel-default-devel
cluster-md-kmp-default-debuginfo
ocfs2-kmp-default-debuginfo
python3-perf-debuginfo
python3-perf
python2-perf-debuginfo
kernel-debugsource
python2-perf
perf
kernel-tools-devel
kernel
kernel-debuginfo
bpftool
kernel-tools-debuginfo
bpftool-debuginfo
kernel-tools
perf-debuginfo
reiserfs-kmp-default-debuginfo
kernel-default-livepatch
kernel-default-livepatch-devel
kernel-preempt
kernel-preempt-devel-debuginfo
reiserfs-kmp-default
kernel-preempt-devel
kernel-preempt-debuginfo
kernel-preempt-debugsource
dtb-amlogic
dlm-kmp-64kb-debuginfo
kernel-64kb-devel
dtb-renesas
ocfs2-kmp-64kb-debuginfo
dtb-broadcom
dtb-apm
dtb-mediatek
kernel-64kb-debuginfo
dtb-exynos
dtb-marvell
kernel-64kb
dtb-al
kernel-default-optional
kselftests-kmp-default-debuginfo
kselftests-kmp-default
kernel-obs-qa
kernel-default-optional-debuginfo
kernel-preempt-livepatch-devel
kernel-preempt-optional
ocfs2-kmp-preempt
dlm-kmp-preempt-debuginfo
gfs2-kmp-preempt
kernel-preempt-extra
cluster-md-kmp-preempt-debuginfo
kernel-preempt-extra-debuginfo
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-64kb-extra
kernel-kvmsmall-livepatch-devel
kernel-kvmsmall-debugsource
kernel-debug-debugsource
reiserfs-kmp-64kb
dtb-socionext
dtb-amd
dtb-altera
dtb-arm
reiserfs-kmp-preempt-debuginfo
dtb-qcom
cluster-md-kmp-64kb-debuginfo
kernel-64kb-extra-debuginfo
dtb-lg
reiserfs-kmp-64kb-debuginfo
dtb-hisilicon
kernel-64kb-optional-debuginfo
dtb-nvidia
kselftests-kmp-64kb
dtb-rockchip
dtb-sprd
dtb-cavium
gfs2-kmp-64kb
dtb-xilinx
kernel-64kb-livepatch-devel
dtb-zte
dtb-freescale
dtb-allwinner
kernel-64kb-debugsource
ocfs2-kmp-preempt-debuginfo
gfs2-kmp-preempt-debuginfo
kselftests-kmp-preempt-debuginfo
cluster-md-kmp-preempt
kselftests-kmp-preempt
kernel-preempt-optional-debuginfo
reiserfs-kmp-preempt
dlm-kmp-preempt
kernel-zfcpdump
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
cluster-md-kmp-64kb
kernel-64kb-devel-debuginfo
kernel-default-base-rebuild
kernel-docs-html
PowerStore T
EMC Cloud Tiering Appliance
Dell Secure Connect Gateway

How to mitigate CVE-2021-47074

Install update from vendor's website.

Linux kernel - addressed in versions 5.10.40, 5.12.7, 5.13
kgraft-patch-4_12_14-122_219-default - update to 1-8.3.1
kernel-livepatch-5_3_18-150200_24_191-default-debuginfo - update to 1-150200.5.3.1
kernel-livepatch-5_3_18-150200_24_191-default - update to 1-150200.5.3.1
kernel-livepatch-SLE15-SP2_Update_48-debugsource - update to 1-150200.5.3.1
kernel-livepatch-5_3_18-150300_59_161-default - update to 1-150300.7.3.1
kernel-livepatch-SLE15-SP3_Update_44-debugsource - update to 1-150300.7.3.1
kernel-livepatch-5_3_18-150300_59_161-default-debuginfo - update to 1-150300.7.3.1
kernel-livepatch-5_3_18-150300_59_161-preempt - update to 1-150300.7.3.1
kernel-livepatch-5_3_18-150300_59_161-preempt-debuginfo - update to 1-150300.7.3.1
PowerStore T - update to 4.0.0.2-2365061
ocfs2-kmp-rt - update to 4.12.14-10.188.1
dlm-kmp-rt - update to 4.12.14-10.188.1
kernel-rt_debug-debuginfo - update to 4.12.14-10.188.1
kernel-rt_debug-debugsource - update to 4.12.14-10.188.1
kernel-rt-base-debuginfo - update to 4.12.14-10.188.1
kernel-rt-base - update to 4.12.14-10.188.1
kernel-rt-devel-debuginfo - update to 4.12.14-10.188.1
kernel-rt-debuginfo - addressed in versions 4.12.14-10.188.1, 5.3.18-150300.169.1
gfs2-kmp-rt - update to 4.12.14-10.188.1
ocfs2-kmp-rt-debuginfo - update to 4.12.14-10.188.1
kernel-syms-rt - update to 4.12.14-10.188.1
kernel-rt_debug-devel-debuginfo - update to 4.12.14-10.188.1
cluster-md-kmp-rt - update to 4.12.14-10.188.1
dlm-kmp-rt-debuginfo - update to 4.12.14-10.188.1
cluster-md-kmp-rt-debuginfo - update to 4.12.14-10.188.1
kernel-rt-debugsource - addressed in versions 4.12.14-10.188.1, 5.3.18-150300.169.1
kernel-rt-devel - update to 4.12.14-10.188.1
gfs2-kmp-rt-debuginfo - update to 4.12.14-10.188.1
kernel-rt_debug-devel - update to 4.12.14-10.188.1
kernel-rt_debug - update to 4.12.14-10.188.1
kernel-rt - addressed in versions 4.12.14-10.188.1, 5.3.18-150300.169.1
kernel-source-rt - addressed in versions 4.12.14-10.188.1, 5.3.18-150300.169.1
kernel-devel-rt - update to 4.12.14-10.188.1
kernel-azure - update to 4.12.14-16.188.1
kernel-azure-base - update to 4.12.14-16.188.1
kernel-syms-azure - update to 4.12.14-16.188.1
kernel-azure-debuginfo - update to 4.12.14-16.188.1
kernel-azure-devel - update to 4.12.14-16.188.1
kernel-azure-base-debuginfo - update to 4.12.14-16.188.1
kernel-azure-debugsource - update to 4.12.14-16.188.1
kernel-devel-azure - update to 4.12.14-16.188.1
kernel-source-azure - update to 4.12.14-16.188.1
kernel-default-extra - addressed in versions 4.12.14-122.219.1, 5.3.18-150300.59.161.1
gfs2-kmp-default - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.191.1, 5.3.18-150300.59.161.1
kernel-default-extra-debuginfo - addressed in versions 4.12.14-122.219.1, 5.3.18-150300.59.161.1
kernel-default-man - update to 4.12.14-122.219.1
kernel-obs-build-debugsource - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.191.1, 5.3.18-150300.59.161.1
kernel-obs-build - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.191.1, 5.3.18-150300.59.161.1
kernel-docs - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.191.1, 5.3.18-150300.59.161.2
kernel-default-kgraft-devel - update to 4.12.14-122.219.1
kernel-default-kgraft - update to 4.12.14-122.219.1
kernel-default-devel-debuginfo - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.191.1, 5.3.18-150300.59.161.1
kernel-devel - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.191.1, 5.3.18-150300.59.161.1
kernel-source - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.191.1, 5.3.18-150300.59.161.1
kernel-macros - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.191.1, 5.3.18-150300.59.161.1
kernel-default - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.191.1, 5.3.18-150300.59.161.1
kernel-default-debuginfo - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.191.1, 5.3.18-150300.59.161.1
kernel-default-base-debuginfo - update to 4.12.14-122.219.1
kernel-default-base - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.191.1.150200.9.97.1, 5.3.18-150300.59.161.1.150300.18.94.1
ocfs2-kmp-default - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.191.1, 5.3.18-150300.59.161.1
gfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.191.1, 5.3.18-150300.59.161.1
dlm-kmp-default-debuginfo - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.191.1, 5.3.18-150300.59.161.1
kernel-syms - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.191.1, 5.3.18-150300.59.161.1
cluster-md-kmp-default - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.191.1, 5.3.18-150300.59.161.1
kernel-default-debugsource - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.191.1, 5.3.18-150300.59.161.1
dlm-kmp-default - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.191.1, 5.3.18-150300.59.161.1
kernel-default-devel - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.191.1, 5.3.18-150300.59.161.1
cluster-md-kmp-default-debuginfo - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.191.1, 5.3.18-150300.59.161.1
ocfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.191.1, 5.3.18-150300.59.161.1
python3-perf-debuginfo - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
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
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
kernel - 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-debuginfo - 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
kernel-tools-debuginfo - 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 - 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
reiserfs-kmp-default-debuginfo - addressed in versions 5.3.18-150200.24.191.1, 5.3.18-150300.59.161.1
kernel-default-livepatch - addressed in versions 5.3.18-150200.24.191.1, 5.3.18-150300.59.161.1
kernel-default-livepatch-devel - addressed in versions 5.3.18-150200.24.191.1, 5.3.18-150300.59.161.1
kernel-preempt - addressed in versions 5.3.18-150200.24.191.1, 5.3.18-150300.59.161.1
kernel-preempt-devel-debuginfo - addressed in versions 5.3.18-150200.24.191.1, 5.3.18-150300.59.161.1
reiserfs-kmp-default - addressed in versions 5.3.18-150200.24.191.1, 5.3.18-150300.59.161.1
kernel-preempt-devel - addressed in versions 5.3.18-150200.24.191.1, 5.3.18-150300.59.161.1
kernel-preempt-debuginfo - addressed in versions 5.3.18-150200.24.191.1, 5.3.18-150300.59.161.1
kernel-preempt-debugsource - addressed in versions 5.3.18-150200.24.191.1, 5.3.18-150300.59.161.1
dtb-amlogic - update to 5.3.18-150300.59.161.1
dlm-kmp-64kb-debuginfo - update to 5.3.18-150300.59.161.1
kernel-64kb-devel - update to 5.3.18-150300.59.161.1
dtb-renesas - update to 5.3.18-150300.59.161.1
ocfs2-kmp-64kb-debuginfo - update to 5.3.18-150300.59.161.1
dtb-broadcom - update to 5.3.18-150300.59.161.1
dtb-apm - update to 5.3.18-150300.59.161.1
dtb-mediatek - update to 5.3.18-150300.59.161.1
kernel-64kb-debuginfo - update to 5.3.18-150300.59.161.1
dtb-exynos - update to 5.3.18-150300.59.161.1
dtb-marvell - update to 5.3.18-150300.59.161.1
kernel-64kb - update to 5.3.18-150300.59.161.1
dtb-al - update to 5.3.18-150300.59.161.1
kernel-default-optional - update to 5.3.18-150300.59.161.1
kselftests-kmp-default-debuginfo - update to 5.3.18-150300.59.161.1
kselftests-kmp-default - update to 5.3.18-150300.59.161.1
kernel-obs-qa - update to 5.3.18-150300.59.161.1
kernel-default-optional-debuginfo - update to 5.3.18-150300.59.161.1
kernel-preempt-livepatch-devel - update to 5.3.18-150300.59.161.1
kernel-preempt-optional - update to 5.3.18-150300.59.161.1
ocfs2-kmp-preempt - update to 5.3.18-150300.59.161.1
dlm-kmp-preempt-debuginfo - update to 5.3.18-150300.59.161.1
gfs2-kmp-preempt - update to 5.3.18-150300.59.161.1
kernel-preempt-extra - update to 5.3.18-150300.59.161.1
cluster-md-kmp-preempt-debuginfo - update to 5.3.18-150300.59.161.1
kernel-preempt-extra-debuginfo - update to 5.3.18-150300.59.161.1
kernel-debug-devel - update to 5.3.18-150300.59.161.1
kernel-source-vanilla - update to 5.3.18-150300.59.161.1
kernel-kvmsmall - update to 5.3.18-150300.59.161.1
kernel-debug - update to 5.3.18-150300.59.161.1
kernel-debug-livepatch-devel - update to 5.3.18-150300.59.161.1
kernel-kvmsmall-devel - update to 5.3.18-150300.59.161.1
kernel-debug-devel-debuginfo - update to 5.3.18-150300.59.161.1
kernel-kvmsmall-devel-debuginfo - update to 5.3.18-150300.59.161.1
kernel-debug-debuginfo - update to 5.3.18-150300.59.161.1
kernel-kvmsmall-debuginfo - update to 5.3.18-150300.59.161.1
kernel-64kb-extra - update to 5.3.18-150300.59.161.1
kernel-kvmsmall-livepatch-devel - update to 5.3.18-150300.59.161.1
kernel-kvmsmall-debugsource - update to 5.3.18-150300.59.161.1
kernel-debug-debugsource - update to 5.3.18-150300.59.161.1
reiserfs-kmp-64kb - update to 5.3.18-150300.59.161.1
dtb-socionext - update to 5.3.18-150300.59.161.1
dtb-amd - update to 5.3.18-150300.59.161.1
dtb-altera - update to 5.3.18-150300.59.161.1
dtb-arm - update to 5.3.18-150300.59.161.1
reiserfs-kmp-preempt-debuginfo - update to 5.3.18-150300.59.161.1
dtb-qcom - update to 5.3.18-150300.59.161.1
cluster-md-kmp-64kb-debuginfo - update to 5.3.18-150300.59.161.1
kernel-64kb-extra-debuginfo - update to 5.3.18-150300.59.161.1
dtb-lg - update to 5.3.18-150300.59.161.1
reiserfs-kmp-64kb-debuginfo - update to 5.3.18-150300.59.161.1
dtb-hisilicon - update to 5.3.18-150300.59.161.1
kernel-64kb-optional-debuginfo - update to 5.3.18-150300.59.161.1
dtb-nvidia - update to 5.3.18-150300.59.161.1
kselftests-kmp-64kb - update to 5.3.18-150300.59.161.1
dtb-rockchip - update to 5.3.18-150300.59.161.1
dtb-sprd - update to 5.3.18-150300.59.161.1
dtb-cavium - update to 5.3.18-150300.59.161.1
gfs2-kmp-64kb - update to 5.3.18-150300.59.161.1
dtb-xilinx - update to 5.3.18-150300.59.161.1
kernel-64kb-livepatch-devel - update to 5.3.18-150300.59.161.1
dtb-zte - update to 5.3.18-150300.59.161.1
dtb-freescale - update to 5.3.18-150300.59.161.1
dtb-allwinner - update to 5.3.18-150300.59.161.1
kernel-64kb-debugsource - update to 5.3.18-150300.59.161.1
ocfs2-kmp-preempt-debuginfo - update to 5.3.18-150300.59.161.1
gfs2-kmp-preempt-debuginfo - update to 5.3.18-150300.59.161.1
kselftests-kmp-preempt-debuginfo - update to 5.3.18-150300.59.161.1
cluster-md-kmp-preempt - update to 5.3.18-150300.59.161.1
kselftests-kmp-preempt - update to 5.3.18-150300.59.161.1
kernel-preempt-optional-debuginfo - update to 5.3.18-150300.59.161.1
reiserfs-kmp-preempt - update to 5.3.18-150300.59.161.1
dlm-kmp-preempt - update to 5.3.18-150300.59.161.1
kernel-zfcpdump - update to 5.3.18-150300.59.161.1
kernel-zfcpdump-debuginfo - update to 5.3.18-150300.59.161.1
kernel-zfcpdump-debugsource - update to 5.3.18-150300.59.161.1
dtb-aarch64 - update to 5.3.18-150300.59.161.1
kselftests-kmp-64kb-debuginfo - update to 5.3.18-150300.59.161.1
kernel-64kb-optional - update to 5.3.18-150300.59.161.1
ocfs2-kmp-64kb - update to 5.3.18-150300.59.161.1
dlm-kmp-64kb - update to 5.3.18-150300.59.161.1
gfs2-kmp-64kb-debuginfo - update to 5.3.18-150300.59.161.1
cluster-md-kmp-64kb - update to 5.3.18-150300.59.161.1
kernel-64kb-devel-debuginfo - update to 5.3.18-150300.59.161.1
kernel-default-base-rebuild - update to 5.3.18-150300.59.161.1.150300.18.94.1
kernel-docs-html - update to 5.3.18-150300.59.161.2
Dell Secure Connect Gateway - update to 5.26.00.18
EMC Cloud Tiering Appliance - update to 13.2.0.2.31

External References

Related Security Bulletins