Out-of-bounds read in Linux kernel - CVE-2021-47240

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Main Vulnerability Database Vulnerabilities #VU90290

Out-of-bounds read in Linux kernel - CVE-2021-47240

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


Vulnerability identifier: #VU90290
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-2021-47240
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 qrtr_endpoint_post() function in net/qrtr/qrtr.c. A local user can perform a denial of service (DoS) attack.


Affected software

Linux kernel
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Manager Proxy
SUSE Manager Retail Branch Server
SUSE Manager Server
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Micro for Rancher
SUSE Enterprise Storage
SUSE Linux Enterprise Server 15 SP2 LTSS
SUSE Linux Enterprise Server 15 SP2 Business Critical Linux
SUSE Linux Enterprise Live Patching
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
kernel-livepatch-5_3_18-150200_24_194-default-debuginfo
kernel-livepatch-5_3_18-150200_24_194-default
kernel-livepatch-SLE15-SP2_Update_49-debugsource
kernel-livepatch-5_3_18-150300_59_164-preempt
kernel-livepatch-SLE15-SP3_Update_45-debugsource
kernel-livepatch-5_3_18-150300_59_164-default
kernel-livepatch-5_3_18-150300_59_164-preempt-debuginfo
kernel-livepatch-5_3_18-150300_59_164-default-debuginfo
kernel-obs-build-debugsource
kernel-preempt-devel
kernel-preempt-devel-debuginfo
kernel-obs-build
kernel-default-devel-debuginfo
kernel-default-devel
kernel-preempt-debugsource
kernel-syms
kernel-default-livepatch-devel
kernel-source
kernel-devel
kernel-macros
kernel-docs
reiserfs-kmp-default-debuginfo
reiserfs-kmp-default
kernel-preempt-debuginfo
kernel-preempt
ocfs2-kmp-default
dlm-kmp-default
ocfs2-kmp-default-debuginfo
cluster-md-kmp-default
gfs2-kmp-default
dlm-kmp-default-debuginfo
cluster-md-kmp-default-debuginfo
gfs2-kmp-default-debuginfo
kernel-default-debugsource
kernel-default
kernel-default-debuginfo
kernel-default-livepatch
kernel-default-base
dtb-rockchip
kernel-zfcpdump-debugsource
dtb-aarch64
kernel-zfcpdump-debuginfo
ocfs2-kmp-64kb-debuginfo
dtb-sprd
dtb-hisilicon
dtb-arm
kernel-64kb-debugsource
kernel-64kb-livepatch-devel
reiserfs-kmp-64kb
dtb-freescale
kernel-64kb-optional
dlm-kmp-64kb
kernel-zfcpdump
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
kernel-preempt-extra
kernel-preempt-optional
reiserfs-kmp-preempt-debuginfo
dtb-al
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-apm
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
kernel-kvmsmall-debugsource
kernel-kvmsmall-debuginfo
kernel-kvmsmall-livepatch-devel
kernel-kvmsmall-devel-debuginfo
kernel-debug-devel-debuginfo
kernel-debug-debuginfo
kernel-debug-debugsource
kernel-debug-livepatch-devel
kernel-debug-devel
kernel-kvmsmall-devel
kernel-debug
kernel-kvmsmall
kernel-docs-html
kernel-source-vanilla
dtb-lg
dtb-allwinner
kernel-64kb
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
kernel-default-extra-debuginfo
kselftests-kmp-default-debuginfo
kernel-default-optional-debuginfo
kselftests-kmp-default
kernel-default-optional
kernel-default-extra
kernel-default-base-rebuild
kernel-rt-debugsource
kernel-source-rt
kernel-rt-debuginfo
kernel-rt
EMC Cloud Tiering Appliance

How to mitigate CVE-2021-47240

Install update from vendor's website.

Linux kernel - addressed in versions 4.19.196, 5.4.128, 5.10.46, 5.12.13, 5.13
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-SLE15-SP2_Update_49-debugsource - 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-SLE15-SP3_Update_45-debugsource - 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-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-obs-build-debugsource - 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
kernel-preempt-devel-debuginfo - addressed in versions 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-obs-build - addressed in versions 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-default-devel-debuginfo - addressed in versions 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-default-devel - 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-syms - 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-source - addressed in versions 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-devel - addressed in versions 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-macros - addressed in versions 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-docs - 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-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
ocfs2-kmp-default - addressed in versions 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
dlm-kmp-default - addressed in versions 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
ocfs2-kmp-default-debuginfo - addressed in versions 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
cluster-md-kmp-default - addressed in versions 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
gfs2-kmp-default - addressed in versions 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
dlm-kmp-default-debuginfo - addressed in versions 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
cluster-md-kmp-default-debuginfo - addressed in versions 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
gfs2-kmp-default-debuginfo - addressed in versions 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-default-debugsource - addressed in versions 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-default - addressed in versions 5.3.18-150200.24.194.1, 5.3.18-150300.59.164.1
kernel-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-base - addressed in versions 5.3.18-150200.24.194.1.150200.9.99.1, 5.3.18-150300.59.164.1.150300.18.96.1
dtb-rockchip - update to 5.3.18-150300.59.164.1
kernel-zfcpdump-debugsource - update to 5.3.18-150300.59.164.1
dtb-aarch64 - update to 5.3.18-150300.59.164.1
kernel-zfcpdump-debuginfo - update to 5.3.18-150300.59.164.1
ocfs2-kmp-64kb-debuginfo - 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
dlm-kmp-64kb - update to 5.3.18-150300.59.164.1
kernel-zfcpdump - 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
kernel-preempt-extra - update to 5.3.18-150300.59.164.1
kernel-preempt-optional - update to 5.3.18-150300.59.164.1
reiserfs-kmp-preempt-debuginfo - 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
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-apm - 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
kernel-kvmsmall-debugsource - 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
kernel-debug-devel-debuginfo - update to 5.3.18-150300.59.164.1
kernel-debug-debuginfo - update to 5.3.18-150300.59.164.1
kernel-debug-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
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
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
kernel-default-extra-debuginfo - 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-extra - 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
kernel-rt-debugsource - addressed in versions 5.3.18-150300.172.1, 5.3.18-150300.211.1
kernel-source-rt - addressed in versions 5.3.18-150300.172.1, 5.3.18-150300.211.1
kernel-rt-debuginfo - addressed in versions 5.3.18-150300.172.1, 5.3.18-150300.211.1
kernel-rt - addressed in versions 5.3.18-150300.172.1, 5.3.18-150300.211.1
EMC Cloud Tiering Appliance - update to 13.2.0.2.31

External References

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