Integer underflow in Linux kernel - CVE-2021-47588

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Main Vulnerability Database Vulnerabilities #VU92374

Integer underflow in Linux kernel - CVE-2021-47588

Published: June 20, 2024 / Updated: May 13, 2025


Vulnerability identifier: #VU92374
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-47588
CWE-ID: CWE-191
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to execute arbitrary code.

The vulnerability exists due to integer underflow within the sit_init_net() function in net/ipv6/sit.c. A local user can execute arbitrary code.


Affected software

Linux kernel
SUSE Linux Enterprise Real Time 12
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing 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 Workstation Extension 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Desktop 15
openSUSE Leap Micro
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Live Patching
SUSE Linux Enterprise Workstation Extension 12
SUSE Real Time Module
Public Cloud Module
Basesystem Module
Legacy Module
Development Tools Module
openSUSE Leap
RecoverPoint for Virtual Machines
kgraft-patch-4_12_14-122_225-default
kernel-livepatch-5_14_21-150500_55_73-default-debuginfo
kernel-livepatch-5_14_21-150500_55_73-default
kernel-livepatch-SLE15-SP5_Update_17-debugsource
kernel-livepatch-5_14_21-150500_13_64-rt-debuginfo
kernel-livepatch-5_14_21-150500_13_64-rt
kernel-livepatch-SLE15-SP5-RT_Update_18-debugsource
kernel-source-rt
kernel-rt-devel-debuginfo
kernel-rt_debug
kernel-rt
kernel-devel-rt
ocfs2-kmp-rt
kernel-syms-rt
gfs2-kmp-rt
kernel-rt-debuginfo
gfs2-kmp-rt-debuginfo
kernel-rt-devel
kernel-rt_debug-devel-debuginfo
kernel-rt-debugsource
ocfs2-kmp-rt-debuginfo
kernel-rt_debug-devel
dlm-kmp-rt-debuginfo
dlm-kmp-rt
kernel-rt_debug-debugsource
cluster-md-kmp-rt
kernel-rt-base
kernel-rt-base-debuginfo
cluster-md-kmp-rt-debuginfo
kernel-rt_debug-debuginfo
kernel-azure
kernel-azure-base
kernel-azure-base-debuginfo
kernel-syms-azure
kernel-azure-debugsource
kernel-azure-debuginfo
kernel-devel-azure
kernel-source-azure
kernel-azure-devel
kernel-default-devel
kernel-obs-build-debugsource
kernel-obs-build
kernel-default-man
kernel-default-extra
kernel-default-extra-debuginfo
kernel-default-kgraft
kernel-default-kgraft-devel
kernel-default-devel-debuginfo
kernel-macros
kernel-devel
cluster-md-kmp-default-debuginfo
kernel-default-debuginfo
kernel-default-base
kernel-source
kernel-default
gfs2-kmp-default-debuginfo
gfs2-kmp-default
kernel-default-base-debuginfo
ocfs2-kmp-default-debuginfo
dlm-kmp-default
kernel-default-debugsource
dlm-kmp-default-debuginfo
ocfs2-kmp-default
kernel-syms
cluster-md-kmp-default
kernel-docs
kselftests-kmp-rt-debuginfo
reiserfs-kmp-rt
kernel-rt-optional-debuginfo
kernel-rt-livepatch
kernel-rt_debug-livepatch-devel
kernel-rt-vdso
kernel-rt-extra-debuginfo
kselftests-kmp-rt
kernel-rt-extra
kernel-rt-vdso-debuginfo
kernel-rt-livepatch-devel
kernel-rt-optional
kernel-rt_debug-vdso-debuginfo
reiserfs-kmp-rt-debuginfo
kernel-rt_debug-vdso
kernel-azure-livepatch-devel
ocfs2-kmp-azure-debuginfo
kernel-azure-vdso
kernel-azure-vdso-debuginfo
gfs2-kmp-azure-debuginfo
kernel-azure-extra
kernel-azure-optional
kselftests-kmp-azure
dlm-kmp-azure-debuginfo
cluster-md-kmp-azure
gfs2-kmp-azure
kernel-azure-optional-debuginfo
ocfs2-kmp-azure
kernel-azure-devel-debuginfo
reiserfs-kmp-azure
dlm-kmp-azure
kernel-azure-extra-debuginfo
cluster-md-kmp-azure-debuginfo
kselftests-kmp-azure-debuginfo
reiserfs-kmp-azure-debuginfo
kselftests-kmp-64kb-debuginfo
kernel-64kb-optional
dtb-qcom
dtb-broadcom
dtb-altera
dtb-mediatek
dtb-arm
dtb-amlogic
dtb-apm
dtb-amd
dtb-apple
dtb-cavium
dtb-amazon
dtb-sprd
dtb-hisilicon
dtb-marvell
gfs2-kmp-64kb-debuginfo
kernel-64kb-devel-debuginfo
dlm-kmp-64kb-debuginfo
dtb-exynos
dtb-freescale
ocfs2-kmp-64kb-debuginfo
kernel-64kb
kernel-kvmsmall-livepatch-devel
kernel-kvmsmall-debuginfo
kernel-kvmsmall-devel-debuginfo
kselftests-kmp-default
kernel-default-livepatch-devel
kselftests-kmp-default-debuginfo
kernel-kvmsmall-devel
kernel-default-optional
kernel-obs-qa
kernel-default-optional-debuginfo
kernel-debug-devel
kernel-source-vanilla
kernel-debug
kernel-debug-livepatch-devel
kernel-debug-debuginfo
kernel-debug-debugsource
dtb-nvidia
kernel-debug-devel-debuginfo
kernel-kvmsmall-vdso-debuginfo
kernel-kvmsmall-vdso
kernel-default-vdso
kernel-default-vdso-debuginfo
kernel-debug-vdso
kernel-debug-vdso-debuginfo
kernel-kvmsmall-debugsource
kernel-64kb-debuginfo
gfs2-kmp-64kb
kernel-64kb-optional-debuginfo
dtb-allwinner
kernel-64kb-extra
kernel-64kb-extra-debuginfo
kernel-64kb-debugsource
kernel-64kb-livepatch-devel
kernel-64kb-devel
kselftests-kmp-64kb
reiserfs-kmp-64kb-debuginfo
dlm-kmp-64kb
dtb-renesas
dtb-rockchip
ocfs2-kmp-64kb
reiserfs-kmp-64kb
cluster-md-kmp-64kb-debuginfo
dtb-socionext
dtb-lg
reiserfs-kmp-default-debuginfo
reiserfs-kmp-default
kernel-default-livepatch
kernel-kvmsmall
kernel-zfcpdump
kernel-zfcpdump-debugsource
kernel-zfcpdump-debuginfo
dtb-aarch64
dtb-xilinx
cluster-md-kmp-64kb
kernel-default-base-rebuild
kernel-docs-html
Dell Secure Connect Gateway

How to mitigate CVE-2021-47588

Install update from vendor's website.

Linux kernel - addressed in versions 4.14.259, 4.19.222, 5.4.168, 5.10.88, 5.15.11, 5.16
RecoverPoint for Virtual Machines - update to 6.0 SP2 P1
kgraft-patch-4_12_14-122_225-default - update to 1-8.3.1
kernel-livepatch-5_14_21-150500_55_73-default-debuginfo - update to 1-150500.11.3.1
kernel-livepatch-5_14_21-150500_55_73-default - update to 1-150500.11.3.1
kernel-livepatch-SLE15-SP5_Update_17-debugsource - update to 1-150500.11.3.1
kernel-livepatch-5_14_21-150500_13_64-rt-debuginfo - update to 1-150500.11.3.1
kernel-livepatch-5_14_21-150500_13_64-rt - update to 1-150500.11.3.1
kernel-livepatch-SLE15-SP5-RT_Update_18-debugsource - update to 1-150500.11.3.1
kernel-source-rt - addressed in versions 4.12.14-10.197.1, 5.14.21-150500.13.64.1
kernel-rt-devel-debuginfo - addressed in versions 4.12.14-10.197.1, 5.14.21-150500.13.64.1
kernel-rt_debug - addressed in versions 4.12.14-10.197.1, 5.14.21-150500.13.64.1
kernel-rt - addressed in versions 4.12.14-10.197.1, 5.14.21-150500.13.64.1
kernel-devel-rt - addressed in versions 4.12.14-10.197.1, 5.14.21-150500.13.64.1
ocfs2-kmp-rt - addressed in versions 4.12.14-10.197.1, 5.14.21-150500.13.64.1
kernel-syms-rt - addressed in versions 4.12.14-10.197.1, 5.14.21-150500.13.64.1
gfs2-kmp-rt - addressed in versions 4.12.14-10.197.1, 5.14.21-150500.13.64.1
kernel-rt-debuginfo - addressed in versions 4.12.14-10.197.1, 5.14.21-150500.13.64.1
gfs2-kmp-rt-debuginfo - addressed in versions 4.12.14-10.197.1, 5.14.21-150500.13.64.1
kernel-rt-devel - addressed in versions 4.12.14-10.197.1, 5.14.21-150500.13.64.1
kernel-rt_debug-devel-debuginfo - addressed in versions 4.12.14-10.197.1, 5.14.21-150500.13.64.1
kernel-rt-debugsource - addressed in versions 4.12.14-10.197.1, 5.14.21-150500.13.64.1
ocfs2-kmp-rt-debuginfo - addressed in versions 4.12.14-10.197.1, 5.14.21-150500.13.64.1
kernel-rt_debug-devel - addressed in versions 4.12.14-10.197.1, 5.14.21-150500.13.64.1
dlm-kmp-rt-debuginfo - addressed in versions 4.12.14-10.197.1, 5.14.21-150500.13.64.1
dlm-kmp-rt - addressed in versions 4.12.14-10.197.1, 5.14.21-150500.13.64.1
kernel-rt_debug-debugsource - addressed in versions 4.12.14-10.197.1, 5.14.21-150500.13.64.1
cluster-md-kmp-rt - addressed in versions 4.12.14-10.197.1, 5.14.21-150500.13.64.1
kernel-rt-base - update to 4.12.14-10.197.1
kernel-rt-base-debuginfo - update to 4.12.14-10.197.1
cluster-md-kmp-rt-debuginfo - addressed in versions 4.12.14-10.197.1, 5.14.21-150500.13.64.1
kernel-rt_debug-debuginfo - addressed in versions 4.12.14-10.197.1, 5.14.21-150500.13.64.1
kernel-azure - addressed in versions 4.12.14-16.194.1, 5.14.21-150500.33.63.1
kernel-azure-base - update to 4.12.14-16.194.1
kernel-azure-base-debuginfo - update to 4.12.14-16.194.1
kernel-syms-azure - addressed in versions 4.12.14-16.194.1, 5.14.21-150500.33.63.1
kernel-azure-debugsource - addressed in versions 4.12.14-16.194.1, 5.14.21-150500.33.63.1
kernel-azure-debuginfo - addressed in versions 4.12.14-16.194.1, 5.14.21-150500.33.63.1
kernel-devel-azure - addressed in versions 4.12.14-16.194.1, 5.14.21-150500.33.63.1
kernel-source-azure - addressed in versions 4.12.14-16.194.1, 5.14.21-150500.33.63.1
kernel-azure-devel - addressed in versions 4.12.14-16.194.1, 5.14.21-150500.33.63.1
kernel-default-devel - addressed in versions 4.12.14-122.225.1, 5.14.21-150500.55.73.1
kernel-obs-build-debugsource - addressed in versions 4.12.14-122.225.1, 5.14.21-150500.55.73.1
kernel-obs-build - addressed in versions 4.12.14-122.225.1, 5.14.21-150500.55.73.1
kernel-default-man - update to 4.12.14-122.225.1
kernel-default-extra - addressed in versions 4.12.14-122.225.1, 5.14.21-150500.55.73.1
kernel-default-extra-debuginfo - addressed in versions 4.12.14-122.225.1, 5.14.21-150500.55.73.1
kernel-default-kgraft - update to 4.12.14-122.225.1
kernel-default-kgraft-devel - update to 4.12.14-122.225.1
kernel-default-devel-debuginfo - addressed in versions 4.12.14-122.225.1, 5.14.21-150500.55.73.1
kernel-macros - addressed in versions 4.12.14-122.225.1, 5.14.21-150500.55.73.1
kernel-devel - addressed in versions 4.12.14-122.225.1, 5.14.21-150500.55.73.1
cluster-md-kmp-default-debuginfo - addressed in versions 4.12.14-122.225.1, 5.14.21-150500.55.73.1
kernel-default-debuginfo - addressed in versions 4.12.14-122.225.1, 5.14.21-150500.55.73.1
kernel-default-base - addressed in versions 4.12.14-122.225.1, 5.14.21-150500.55.73.1.150500.6.33.8
kernel-source - addressed in versions 4.12.14-122.225.1, 5.14.21-150500.55.73.1
kernel-default - addressed in versions 4.12.14-122.225.1, 5.14.21-150500.55.73.1
gfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.225.1, 5.14.21-150500.55.73.1
gfs2-kmp-default - addressed in versions 4.12.14-122.225.1, 5.14.21-150500.55.73.1
kernel-default-base-debuginfo - update to 4.12.14-122.225.1
ocfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.225.1, 5.14.21-150500.55.73.1
dlm-kmp-default - addressed in versions 4.12.14-122.225.1, 5.14.21-150500.55.73.1
kernel-default-debugsource - addressed in versions 4.12.14-122.225.1, 5.14.21-150500.55.73.1
dlm-kmp-default-debuginfo - addressed in versions 4.12.14-122.225.1, 5.14.21-150500.55.73.1
ocfs2-kmp-default - addressed in versions 4.12.14-122.225.1, 5.14.21-150500.55.73.1
kernel-syms - addressed in versions 4.12.14-122.225.1, 5.14.21-150500.55.73.1
cluster-md-kmp-default - addressed in versions 4.12.14-122.225.1, 5.14.21-150500.55.73.1
kernel-docs - addressed in versions 4.12.14-122.225.2, 5.14.21-150500.55.73.2
kselftests-kmp-rt-debuginfo - update to 5.14.21-150500.13.64.1
reiserfs-kmp-rt - update to 5.14.21-150500.13.64.1
kernel-rt-optional-debuginfo - update to 5.14.21-150500.13.64.1
kernel-rt-livepatch - update to 5.14.21-150500.13.64.1
kernel-rt_debug-livepatch-devel - update to 5.14.21-150500.13.64.1
kernel-rt-vdso - update to 5.14.21-150500.13.64.1
kernel-rt-extra-debuginfo - update to 5.14.21-150500.13.64.1
kselftests-kmp-rt - update to 5.14.21-150500.13.64.1
kernel-rt-extra - update to 5.14.21-150500.13.64.1
kernel-rt-vdso-debuginfo - update to 5.14.21-150500.13.64.1
kernel-rt-livepatch-devel - update to 5.14.21-150500.13.64.1
kernel-rt-optional - update to 5.14.21-150500.13.64.1
kernel-rt_debug-vdso-debuginfo - update to 5.14.21-150500.13.64.1
reiserfs-kmp-rt-debuginfo - update to 5.14.21-150500.13.64.1
kernel-rt_debug-vdso - update to 5.14.21-150500.13.64.1
kernel-azure-livepatch-devel - update to 5.14.21-150500.33.63.1
ocfs2-kmp-azure-debuginfo - update to 5.14.21-150500.33.63.1
kernel-azure-vdso - update to 5.14.21-150500.33.63.1
kernel-azure-vdso-debuginfo - update to 5.14.21-150500.33.63.1
gfs2-kmp-azure-debuginfo - update to 5.14.21-150500.33.63.1
kernel-azure-extra - update to 5.14.21-150500.33.63.1
kernel-azure-optional - update to 5.14.21-150500.33.63.1
kselftests-kmp-azure - update to 5.14.21-150500.33.63.1
dlm-kmp-azure-debuginfo - update to 5.14.21-150500.33.63.1
cluster-md-kmp-azure - update to 5.14.21-150500.33.63.1
gfs2-kmp-azure - update to 5.14.21-150500.33.63.1
kernel-azure-optional-debuginfo - update to 5.14.21-150500.33.63.1
ocfs2-kmp-azure - update to 5.14.21-150500.33.63.1
kernel-azure-devel-debuginfo - update to 5.14.21-150500.33.63.1
reiserfs-kmp-azure - update to 5.14.21-150500.33.63.1
dlm-kmp-azure - update to 5.14.21-150500.33.63.1
kernel-azure-extra-debuginfo - update to 5.14.21-150500.33.63.1
cluster-md-kmp-azure-debuginfo - update to 5.14.21-150500.33.63.1
kselftests-kmp-azure-debuginfo - update to 5.14.21-150500.33.63.1
reiserfs-kmp-azure-debuginfo - update to 5.14.21-150500.33.63.1
kselftests-kmp-64kb-debuginfo - update to 5.14.21-150500.55.73.1
kernel-64kb-optional - update to 5.14.21-150500.55.73.1
dtb-qcom - update to 5.14.21-150500.55.73.1
dtb-broadcom - update to 5.14.21-150500.55.73.1
dtb-altera - update to 5.14.21-150500.55.73.1
dtb-mediatek - update to 5.14.21-150500.55.73.1
dtb-arm - update to 5.14.21-150500.55.73.1
dtb-amlogic - update to 5.14.21-150500.55.73.1
dtb-apm - update to 5.14.21-150500.55.73.1
dtb-amd - update to 5.14.21-150500.55.73.1
dtb-apple - update to 5.14.21-150500.55.73.1
dtb-cavium - update to 5.14.21-150500.55.73.1
dtb-amazon - update to 5.14.21-150500.55.73.1
dtb-sprd - update to 5.14.21-150500.55.73.1
dtb-hisilicon - update to 5.14.21-150500.55.73.1
dtb-marvell - update to 5.14.21-150500.55.73.1
gfs2-kmp-64kb-debuginfo - update to 5.14.21-150500.55.73.1
kernel-64kb-devel-debuginfo - update to 5.14.21-150500.55.73.1
dlm-kmp-64kb-debuginfo - update to 5.14.21-150500.55.73.1
dtb-exynos - update to 5.14.21-150500.55.73.1
dtb-freescale - update to 5.14.21-150500.55.73.1
ocfs2-kmp-64kb-debuginfo - update to 5.14.21-150500.55.73.1
kernel-64kb - update to 5.14.21-150500.55.73.1
kernel-kvmsmall-livepatch-devel - update to 5.14.21-150500.55.73.1
kernel-kvmsmall-debuginfo - update to 5.14.21-150500.55.73.1
kernel-kvmsmall-devel-debuginfo - update to 5.14.21-150500.55.73.1
kselftests-kmp-default - update to 5.14.21-150500.55.73.1
kernel-default-livepatch-devel - update to 5.14.21-150500.55.73.1
kselftests-kmp-default-debuginfo - update to 5.14.21-150500.55.73.1
kernel-kvmsmall-devel - update to 5.14.21-150500.55.73.1
kernel-default-optional - update to 5.14.21-150500.55.73.1
kernel-obs-qa - update to 5.14.21-150500.55.73.1
kernel-default-optional-debuginfo - update to 5.14.21-150500.55.73.1
kernel-debug-devel - update to 5.14.21-150500.55.73.1
kernel-source-vanilla - update to 5.14.21-150500.55.73.1
kernel-debug - update to 5.14.21-150500.55.73.1
kernel-debug-livepatch-devel - update to 5.14.21-150500.55.73.1
kernel-debug-debuginfo - update to 5.14.21-150500.55.73.1
kernel-debug-debugsource - update to 5.14.21-150500.55.73.1
dtb-nvidia - update to 5.14.21-150500.55.73.1
kernel-debug-devel-debuginfo - update to 5.14.21-150500.55.73.1
kernel-kvmsmall-vdso-debuginfo - update to 5.14.21-150500.55.73.1
kernel-kvmsmall-vdso - update to 5.14.21-150500.55.73.1
kernel-default-vdso - update to 5.14.21-150500.55.73.1
kernel-default-vdso-debuginfo - update to 5.14.21-150500.55.73.1
kernel-debug-vdso - update to 5.14.21-150500.55.73.1
kernel-debug-vdso-debuginfo - update to 5.14.21-150500.55.73.1
kernel-kvmsmall-debugsource - update to 5.14.21-150500.55.73.1
kernel-64kb-debuginfo - update to 5.14.21-150500.55.73.1
gfs2-kmp-64kb - update to 5.14.21-150500.55.73.1
kernel-64kb-optional-debuginfo - update to 5.14.21-150500.55.73.1
dtb-allwinner - update to 5.14.21-150500.55.73.1
kernel-64kb-extra - update to 5.14.21-150500.55.73.1
kernel-64kb-extra-debuginfo - update to 5.14.21-150500.55.73.1
kernel-64kb-debugsource - update to 5.14.21-150500.55.73.1
kernel-64kb-livepatch-devel - update to 5.14.21-150500.55.73.1
kernel-64kb-devel - update to 5.14.21-150500.55.73.1
kselftests-kmp-64kb - update to 5.14.21-150500.55.73.1
reiserfs-kmp-64kb-debuginfo - update to 5.14.21-150500.55.73.1
dlm-kmp-64kb - update to 5.14.21-150500.55.73.1
dtb-renesas - update to 5.14.21-150500.55.73.1
dtb-rockchip - update to 5.14.21-150500.55.73.1
ocfs2-kmp-64kb - update to 5.14.21-150500.55.73.1
reiserfs-kmp-64kb - update to 5.14.21-150500.55.73.1
cluster-md-kmp-64kb-debuginfo - update to 5.14.21-150500.55.73.1
dtb-socionext - update to 5.14.21-150500.55.73.1
dtb-lg - update to 5.14.21-150500.55.73.1
reiserfs-kmp-default-debuginfo - update to 5.14.21-150500.55.73.1
reiserfs-kmp-default - update to 5.14.21-150500.55.73.1
kernel-default-livepatch - update to 5.14.21-150500.55.73.1
kernel-kvmsmall - update to 5.14.21-150500.55.73.1
kernel-zfcpdump - update to 5.14.21-150500.55.73.1
kernel-zfcpdump-debugsource - update to 5.14.21-150500.55.73.1
kernel-zfcpdump-debuginfo - update to 5.14.21-150500.55.73.1
dtb-aarch64 - update to 5.14.21-150500.55.73.1
dtb-xilinx - update to 5.14.21-150500.55.73.1
cluster-md-kmp-64kb - update to 5.14.21-150500.55.73.1
kernel-default-base-rebuild - update to 5.14.21-150500.55.73.1.150500.6.33.8
kernel-docs-html - update to 5.14.21-150500.55.73.2
Dell Secure Connect Gateway - update to 5.26.00.18

External References

Related Security Bulletins