Main Vulnerability Database Vulnerabilities #VU90056

Use-after-free in Linux kernel - CVE-2021-47549

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

Vulnerability identifier: #VU90056

CSH Severity: Low

CVSS v4.0: 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/E:U/U:Clear

CVE-ID: CVE-2021-47549

CWE-ID: CWE-416

Exploitation vector: Local access

Exploit availability: No public exploit available

Affected software:
Linux kernel
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Software Development Kit 12
SUSE Linux Enterprise Real Time 12
SUSE Linux Enterprise High Availability Extension 12
SUSE Manager Proxy
SUSE Manager Retail Branch Server
SUSE Manager Server
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Micro for Rancher
openSUSE Leap Micro
SUSE Enterprise Storage
SUSE Linux Enterprise Workstation Extension 12
SUSE Linux Enterprise Live Patching
SUSE Linux Enterprise Server 15 SP3 LTSS
SUSE Linux Enterprise Server 15 SP3 Business Critical Linux
SUSE Linux Enterprise Desktop 15 SP4 LTSS
SUSE Linux Enterprise Server 15 SP4 LTSS
Legacy Module
Development Tools Module
Basesystem Module
Public Cloud Module
SUSE Real Time Module
openSUSE Leap
openEuler
RecoverPoint for Virtual Machines
kgraft-patch-4_12_14-122_228-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-livepatch-SLE15-SP4_Update_27-debugsource
kernel-livepatch-5_14_21-150400_24_122-default-debuginfo
kernel-livepatch-5_14_21-150400_24_122-default
kernel-livepatch-5_14_21-150500_13_58-rt-debuginfo
kernel-livepatch-SLE15-SP5-RT_Update_16-debugsource
kernel-livepatch-5_14_21-150500_13_58-rt
kernel-livepatch-SLE15-SP5_Update_15-debugsource
kernel-livepatch-5_14_21-150500_55_68-default
kernel-livepatch-5_14_21-150500_55_68-default-debuginfo
cluster-md-kmp-rt
kernel-rt_debug-debuginfo
kernel-rt-debuginfo
gfs2-kmp-rt-debuginfo
kernel-rt-base
kernel-syms-rt
kernel-rt_debug-devel-debuginfo
gfs2-kmp-rt
kernel-rt-debugsource
cluster-md-kmp-rt-debuginfo
kernel-rt_debug
kernel-rt
kernel-devel-rt
dlm-kmp-rt-debuginfo
kernel-rt-devel-debuginfo
kernel-rt_debug-devel
dlm-kmp-rt
kernel-rt-devel
kernel-rt-base-debuginfo
ocfs2-kmp-rt-debuginfo
ocfs2-kmp-rt
kernel-rt_debug-debugsource
kernel-source-rt
kernel-azure-debugsource
kernel-azure
kernel-azure-base
kernel-azure-devel
kernel-azure-debuginfo
kernel-syms-azure
kernel-azure-base-debuginfo
kernel-devel-azure
kernel-source-azure
kernel-default-extra-debuginfo
kernel-default-extra
kernel-default-man
kernel-devel
gfs2-kmp-default
ocfs2-kmp-default
kernel-default-debuginfo
kernel-default-base
kernel-syms
kernel-default-debugsource
dlm-kmp-default
cluster-md-kmp-default
ocfs2-kmp-default-debuginfo
kernel-default-base-debuginfo
dlm-kmp-default-debuginfo
kernel-default
gfs2-kmp-default-debuginfo
kernel-macros
kernel-source
kernel-default-devel-debuginfo
kernel-default-kgraft-devel
cluster-md-kmp-default-debuginfo
kernel-default-devel
kernel-default-kgraft
kernel-docs
kernel-obs-build
kernel-obs-build-debugsource
kernel
python2-perf
bpftool
kernel-tools
python2-perf-debuginfo
kernel-tools-debuginfo
python3-perf-debuginfo
kernel-debuginfo
perf
perf-debuginfo
kernel-tools-devel
bpftool-debuginfo
kernel-debugsource
python3-perf
kernel-kvmsmall
ocfs2-kmp-64kb-debuginfo
kernel-docs-html
kernel-source-vanilla
kernel-64kb-debugsource
kernel-64kb-livepatch-devel
reiserfs-kmp-64kb
dtb-freescale
kernel-64kb-optional
kernel-kvmsmall-devel-debuginfo
kernel-kvmsmall-debuginfo
kernel-kvmsmall-livepatch-devel
kernel-debug
kernel-debug-devel-debuginfo
kernel-debug-debuginfo
kernel-debug-debugsource
kernel-kvmsmall-debugsource
kernel-debug-livepatch-devel
kernel-debug-devel
kernel-kvmsmall-devel
gfs2-kmp-64kb-debuginfo
kernel-64kb-devel
dtb-cavium
kselftests-kmp-64kb-debuginfo
dtb-renesas
dtb-xilinx
reiserfs-kmp-64kb-debuginfo
cluster-md-kmp-64kb
kernel-64kb-extra
gfs2-kmp-64kb
cluster-md-kmp-64kb-debuginfo
dtb-nvidia
dtb-amlogic
kernel-64kb-extra-debuginfo
dtb-al
dtb-lg
dtb-allwinner
kernel-64kb
dtb-mediatek
dtb-exynos
dtb-socionext
kernel-64kb-optional-debuginfo
kernel-64kb-devel-debuginfo
dtb-amd
dlm-kmp-64kb-debuginfo
dtb-qcom
dtb-marvell
dtb-apm
dtb-altera
dtb-broadcom
dtb-zte
kernel-64kb-debuginfo
ocfs2-kmp-64kb
kselftests-kmp-64kb
dlm-kmp-64kb
kernel-preempt-devel
gfs2-kmp-preempt-debuginfo
ocfs2-kmp-preempt
kselftests-kmp-preempt-debuginfo
kernel-preempt-debugsource
gfs2-kmp-preempt
kselftests-kmp-preempt
cluster-md-kmp-preempt-debuginfo
kernel-preempt-debuginfo
reiserfs-kmp-preempt-debuginfo
kernel-preempt-optional
kernel-preempt-extra
dlm-kmp-preempt
kernel-preempt-devel-debuginfo
kernel-preempt-optional-debuginfo
kernel-preempt-livepatch-devel
reiserfs-kmp-preempt
ocfs2-kmp-preempt-debuginfo
dlm-kmp-preempt-debuginfo
kernel-preempt-extra-debuginfo
kernel-preempt
kernel-zfcpdump
kernel-zfcpdump-debugsource
kernel-zfcpdump-debuginfo
dtb-aarch64
dtb-rockchip
dtb-sprd
dtb-hisilicon
dtb-arm
kernel-default-optional-debuginfo
kselftests-kmp-default-debuginfo
kselftests-kmp-default
kernel-default-optional
kernel-default-livepatch
reiserfs-kmp-default
reiserfs-kmp-default-debuginfo
kernel-obs-qa
kernel-default-livepatch-devel
cluster-md-kmp-preempt
kernel-default-base-rebuild
dtb-apple
dtb-amazon
kselftests-kmp-rt-debuginfo
kernel-rt_debug-vdso-debuginfo
kernel-rt_debug-livepatch-devel
kernel-rt_debug-vdso
kernel-rt-livepatch
kernel-rt-extra-debuginfo
kernel-rt-livepatch-devel
reiserfs-kmp-rt
kernel-rt-vdso
reiserfs-kmp-rt-debuginfo
kernel-rt-optional
kernel-rt-optional-debuginfo
kernel-rt-extra
kselftests-kmp-rt
kernel-rt-vdso-debuginfo
ocfs2-kmp-azure-debuginfo
kselftests-kmp-azure
kselftests-kmp-azure-debuginfo
cluster-md-kmp-azure-debuginfo
dlm-kmp-azure-debuginfo
gfs2-kmp-azure
kernel-azure-devel-debuginfo
kernel-azure-livepatch-devel
cluster-md-kmp-azure
kernel-azure-extra-debuginfo
dlm-kmp-azure
kernel-azure-vdso
kernel-azure-vdso-debuginfo
kernel-azure-optional-debuginfo
reiserfs-kmp-azure-debuginfo
kernel-azure-extra
kernel-azure-optional
reiserfs-kmp-azure
gfs2-kmp-azure-debuginfo
ocfs2-kmp-azure
kernel-default-vdso-debuginfo
kernel-default-vdso
kernel-debug-vdso-debuginfo
kernel-debug-vdso
kernel-kvmsmall-vdso-debuginfo
kernel-kvmsmall-vdso

Detailed vulnerability description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the sata_fsl_init_controller() and sata_fsl_remove() functions in drivers/ata/sata_fsl.c. A local user can escalate privileges on the system.

How to mitigate CVE-2021-47549

Install update from vendor's website.

Use-after-free in Linux kernel - CVE-2021-47549

Detailed vulnerability description

How to mitigate CVE-2021-47549

Sources

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