Out-of-bounds read in Linux kernel - CVE-2021-47274

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Main Vulnerability Database Vulnerabilities #VU90294

Out-of-bounds read in Linux kernel - CVE-2021-47274

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


Vulnerability identifier: #VU90294
CSH Severity: Low
CVSS v4: 6.8 [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]
CVE-ID: CVE-2021-47274
CWE-ID: CWE-125
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 an out-of-bounds read error within the trace_event_buffer_lock_reserve() function in kernel/trace/trace.c. A local user can perform a denial of service (DoS) attack.


Affected software

Linux kernel
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Software Development Kit 12
SUSE Linux Enterprise Server for SAP Applications 12
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 Manager Retail Branch Server
SUSE Manager Proxy
SUSE Manager Server
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 High Performance Computing 15 SP2 LTSS
SUSE Linux Enterprise Server 15 SP2 Business Critical Linux
SUSE Linux Enterprise Server 15 SP2 LTSS
SUSE Linux Enterprise Server 15 SP3 Business Critical Linux
SUSE Linux Enterprise Server 15 SP3 LTSS
openSUSE Leap
kgraft-patch-4_12_14-122_219-default
kernel-livepatch-5_3_18-150200_24_194-default
kernel-livepatch-5_3_18-150200_24_194-default-debuginfo
kernel-livepatch-SLE15-SP2_Update_49-debugsource
kernel-livepatch-5_3_18-150300_59_164-default
kernel-livepatch-SLE15-SP3_Update_45-debugsource
kernel-livepatch-5_3_18-150300_59_164-preempt-debuginfo
kernel-livepatch-5_3_18-150300_59_164-preempt
kernel-livepatch-5_3_18-150300_59_164-default-debuginfo
kernel-rt-devel-debuginfo
gfs2-kmp-rt
kernel-rt-base
kernel-rt-base-debuginfo
ocfs2-kmp-rt
dlm-kmp-rt
kernel-rt_debug-debuginfo
kernel-rt_debug-devel
kernel-devel-rt
kernel-source-rt
kernel-rt
kernel-rt_debug
kernel-rt-debuginfo
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_debug-debugsource
kernel-rt-debugsource
kernel-rt-devel
gfs2-kmp-rt-debuginfo
kernel-azure
kernel-azure-base
kernel-source-azure
kernel-devel-azure
kernel-azure-debugsource
kernel-azure-base-debuginfo
kernel-azure-devel
kernel-azure-debuginfo
kernel-syms-azure
kernel-default-extra
kernel-default-extra-debuginfo
kernel-default-man
kernel-obs-build-debugsource
kernel-obs-build
kernel-docs
kernel-default-devel
kernel-default-kgraft-devel
kernel-default-kgraft
kernel-devel
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
cluster-md-kmp-default-debuginfo
kernel-default-devel-debuginfo
kernel-source
kernel-macros
kernel-default
kernel-default-debuginfo
gfs2-kmp-default
ocfs2-kmp-default-debuginfo
kernel-preempt-devel
kernel-preempt-devel-debuginfo
kernel-preempt-debugsource
reiserfs-kmp-default-debuginfo
reiserfs-kmp-default
kernel-preempt
kernel-preempt-debuginfo
kernel-default-livepatch-devel
kernel-default-livepatch
dtb-apm
kernel-zfcpdump-debugsource
kernel-zfcpdump-debuginfo
dtb-aarch64
dtb-rockchip
dtb-sprd
dtb-hisilicon
dtb-arm
kernel-64kb-debugsource
kernel-64kb-livepatch-devel
reiserfs-kmp-64kb
dtb-freescale
kernel-64kb-optional
ocfs2-kmp-64kb-debuginfo
kernel-preempt-extra
kernel-zfcpdump
dtb-al
dtb-lg
dtb-allwinner
kernel-64kb
kernel-preempt-extra-debuginfo
dlm-kmp-preempt-debuginfo
ocfs2-kmp-preempt-debuginfo
reiserfs-kmp-preempt
kernel-preempt-livepatch-devel
kernel-preempt-optional-debuginfo
dlm-kmp-preempt
dlm-kmp-64kb
kernel-debug-devel-debuginfo
kernel-64kb-extra-debuginfo
dtb-amlogic
dtb-nvidia
cluster-md-kmp-64kb-debuginfo
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-64kb-devel
gfs2-kmp-64kb
dtb-exynos
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
kernel-debug-debuginfo
kernel-kvmsmall-debuginfo
kernel-kvmsmall-livepatch-devel
kernel-kvmsmall-devel-debuginfo
reiserfs-kmp-preempt-debuginfo
kernel-debug-debugsource
kernel-kvmsmall-debugsource
kernel-debug-livepatch-devel
kernel-debug-devel
kernel-kvmsmall-devel
kernel-debug
kernel-kvmsmall
kernel-docs-html
kernel-source-vanilla
kernel-preempt-optional
cluster-md-kmp-preempt-debuginfo
kselftests-kmp-preempt
gfs2-kmp-preempt
kselftests-kmp-preempt-debuginfo
ocfs2-kmp-preempt
gfs2-kmp-preempt-debuginfo
cluster-md-kmp-preempt
kernel-obs-qa
kselftests-kmp-default-debuginfo
kernel-default-optional-debuginfo
kselftests-kmp-default
kernel-default-optional
kernel-default-base-rebuild
Dell Secure Connect Gateway
EMC Cloud Tiering Appliance

How to mitigate CVE-2021-47274

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_219-default - update to 1-8.3.1
kernel-livepatch-5_3_18-150200_24_194-default - 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-SLE15-SP2_Update_49-debugsource - update to 1-150200.5.3.1
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-livepatch-5_3_18-150300_59_164-preempt-debuginfo - update to 1-150300.7.3.1
kernel-livepatch-5_3_18-150300_59_164-preempt - update to 1-150300.7.3.1
kernel-livepatch-5_3_18-150300_59_164-default-debuginfo - update to 1-150300.7.3.1
kernel-rt-devel-debuginfo - update to 4.12.14-10.188.1
gfs2-kmp-rt - update to 4.12.14-10.188.1
kernel-rt-base - update to 4.12.14-10.188.1
kernel-rt-base-debuginfo - update to 4.12.14-10.188.1
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-devel - update to 4.12.14-10.188.1
kernel-devel-rt - update to 4.12.14-10.188.1
kernel-source-rt - addressed in versions 4.12.14-10.188.1, 5.3.18-150300.172.1
kernel-rt - addressed in versions 4.12.14-10.188.1, 5.3.18-150300.172.1
kernel-rt_debug - update to 4.12.14-10.188.1
kernel-rt-debuginfo - addressed in versions 4.12.14-10.188.1, 5.3.18-150300.172.1
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_debug-debugsource - update to 4.12.14-10.188.1
kernel-rt-debugsource - addressed in versions 4.12.14-10.188.1, 5.3.18-150300.172.1
kernel-rt-devel - update to 4.12.14-10.188.1
gfs2-kmp-rt-debuginfo - update to 4.12.14-10.188.1
kernel-azure - update to 4.12.14-16.188.1
kernel-azure-base - update to 4.12.14-16.188.1
kernel-source-azure - update to 4.12.14-16.188.1
kernel-devel-azure - update to 4.12.14-16.188.1
kernel-azure-debugsource - update to 4.12.14-16.188.1
kernel-azure-base-debuginfo - update to 4.12.14-16.188.1
kernel-azure-devel - update to 4.12.14-16.188.1
kernel-azure-debuginfo - update to 4.12.14-16.188.1
kernel-syms-azure - update to 4.12.14-16.188.1
kernel-default-extra - addressed in versions 4.12.14-122.219.1, 5.3.18-150300.59.164.1
kernel-default-extra-debuginfo - addressed in versions 4.12.14-122.219.1, 5.3.18-150300.59.164.1
kernel-default-man - update to 4.12.14-122.219.1
kernel-obs-build-debugsource - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-obs-build - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-docs - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-default-devel - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-default-kgraft-devel - update to 4.12.14-122.219.1
kernel-default-kgraft - update to 4.12.14-122.219.1
kernel-devel - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-default-base-debuginfo - update to 4.12.14-122.219.1
kernel-default-base - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.194.1.150200.9.99.1, 5.3.18-150300.59.164.1.150300.18.96.1
ocfs2-kmp-default - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
gfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
dlm-kmp-default-debuginfo - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-syms - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
cluster-md-kmp-default - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-default-debugsource - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
dlm-kmp-default - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
cluster-md-kmp-default-debuginfo - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-default-devel-debuginfo - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-source - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-macros - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-default - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-default-debuginfo - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
gfs2-kmp-default - addressed in versions 4.12.14-122.219.1, 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
ocfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.219.1, 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
kernel-preempt-devel-debuginfo - 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
reiserfs-kmp-default-debuginfo - 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 - 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-default-livepatch-devel - 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
dtb-apm - update to 5.3.18-150300.59.164.1
kernel-zfcpdump-debugsource - update to 5.3.18-150300.59.164.1
kernel-zfcpdump-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
kernel-64kb-optional - update to 5.3.18-150300.59.164.1
ocfs2-kmp-64kb-debuginfo - update to 5.3.18-150300.59.164.1
kernel-preempt-extra - update to 5.3.18-150300.59.164.1
kernel-zfcpdump - update to 5.3.18-150300.59.164.1
dtb-al - update to 5.3.18-150300.59.164.1
dtb-lg - update to 5.3.18-150300.59.164.1
dtb-allwinner - update to 5.3.18-150300.59.164.1
kernel-64kb - update to 5.3.18-150300.59.164.1
kernel-preempt-extra-debuginfo - update to 5.3.18-150300.59.164.1
dlm-kmp-preempt-debuginfo - update to 5.3.18-150300.59.164.1
ocfs2-kmp-preempt-debuginfo - update to 5.3.18-150300.59.164.1
reiserfs-kmp-preempt - update to 5.3.18-150300.59.164.1
kernel-preempt-livepatch-devel - update to 5.3.18-150300.59.164.1
kernel-preempt-optional-debuginfo - update to 5.3.18-150300.59.164.1
dlm-kmp-preempt - update to 5.3.18-150300.59.164.1
dlm-kmp-64kb - update to 5.3.18-150300.59.164.1
kernel-debug-devel-debuginfo - 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
cluster-md-kmp-64kb-debuginfo - 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-64kb-devel - update to 5.3.18-150300.59.164.1
gfs2-kmp-64kb - update to 5.3.18-150300.59.164.1
dtb-exynos - 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
kernel-debug-debuginfo - update to 5.3.18-150300.59.164.1
kernel-kvmsmall-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-devel-debuginfo - update to 5.3.18-150300.59.164.1
reiserfs-kmp-preempt-debuginfo - update to 5.3.18-150300.59.164.1
kernel-debug-debugsource - update to 5.3.18-150300.59.164.1
kernel-kvmsmall-debugsource - update to 5.3.18-150300.59.164.1
kernel-debug-livepatch-devel - update to 5.3.18-150300.59.164.1
kernel-debug-devel - update to 5.3.18-150300.59.164.1
kernel-kvmsmall-devel - update to 5.3.18-150300.59.164.1
kernel-debug - update to 5.3.18-150300.59.164.1
kernel-kvmsmall - update to 5.3.18-150300.59.164.1
kernel-docs-html - update to 5.3.18-150300.59.164.1
kernel-source-vanilla - update to 5.3.18-150300.59.164.1
kernel-preempt-optional - update to 5.3.18-150300.59.164.1
cluster-md-kmp-preempt-debuginfo - update to 5.3.18-150300.59.164.1
kselftests-kmp-preempt - update to 5.3.18-150300.59.164.1
gfs2-kmp-preempt - update to 5.3.18-150300.59.164.1
kselftests-kmp-preempt-debuginfo - update to 5.3.18-150300.59.164.1
ocfs2-kmp-preempt - update to 5.3.18-150300.59.164.1
gfs2-kmp-preempt-debuginfo - update to 5.3.18-150300.59.164.1
cluster-md-kmp-preempt - update to 5.3.18-150300.59.164.1
kernel-obs-qa - update to 5.3.18-150300.59.164.1
kselftests-kmp-default-debuginfo - 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 - update to 5.3.18-150300.59.164.1
kernel-default-optional - 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
Dell Secure Connect Gateway - update to 5.26.00.18
EMC Cloud Tiering Appliance - update to 13.2.0.2.31

External References

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