Use-after-free in Linux kernel - CVE-2021-47341

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Main Vulnerability Database Vulnerabilities #VU90132

Use-after-free in Linux kernel - CVE-2021-47341

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


Vulnerability identifier: #VU90132
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-2021-47341
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability: No public exploit available
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 Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Software Development Kit 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Real Time 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise High Availability Extension 12
SUSE Manager Retail Branch Server
SUSE Manager Server
SUSE Manager Proxy
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 Server 15 SP2 Business Critical Linux
SUSE Linux Enterprise High Performance Computing 15 SP2 LTSS
SUSE Linux Enterprise Server 15 SP2 LTSS
SUSE Linux Enterprise Server 15 SP3 LTSS
SUSE Linux Enterprise Server 15 SP3 Business Critical Linux
openSUSE Leap
RecoverPoint for Virtual Machines
kgraft-patch-4_12_14-122_228-default
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-SLE15-SP3_Update_45-debugsource
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
cluster-md-kmp-rt-debuginfo
kernel-rt-debugsource
ocfs2-kmp-rt
gfs2-kmp-rt
kernel-rt_debug-devel-debuginfo
kernel-syms-rt
kernel-rt-base
gfs2-kmp-rt-debuginfo
kernel-rt-debuginfo
kernel-rt_debug-debuginfo
cluster-md-kmp-rt
dlm-kmp-rt
kernel-rt-devel
kernel-rt_debug-debugsource
kernel-rt_debug
kernel-rt
kernel-source-rt
kernel-devel-rt
dlm-kmp-rt-debuginfo
kernel-rt-devel-debuginfo
kernel-rt_debug-devel
ocfs2-kmp-rt-debuginfo
kernel-rt-base-debuginfo
kernel-source-azure
kernel-azure
kernel-azure-base
kernel-azure-devel
kernel-azure-debuginfo
kernel-azure-debugsource
kernel-syms-azure
kernel-devel-azure
kernel-azure-base-debuginfo
kernel-devel
kernel-default-base-debuginfo
kernel-default
gfs2-kmp-default
dlm-kmp-default-debuginfo
ocfs2-kmp-default-debuginfo
cluster-md-kmp-default
dlm-kmp-default
kernel-default-debugsource
kernel-syms
kernel-default-base
kernel-default-debuginfo
ocfs2-kmp-default
gfs2-kmp-default-debuginfo
cluster-md-kmp-default-debuginfo
kernel-default-devel
kernel-source
kernel-default-devel-debuginfo
kernel-default-kgraft-devel
kernel-macros
kernel-default-kgraft
kernel-default-extra-debuginfo
kernel-default-extra
kernel-default-man
kernel-obs-build
kernel-obs-build-debugsource
kernel-docs
kernel-preempt-devel
reiserfs-kmp-default
reiserfs-kmp-default-debuginfo
kernel-preempt-devel-debuginfo
kernel-preempt-debugsource
kernel-preempt-debuginfo
kernel-preempt
kernel-default-livepatch-devel
kernel-default-livepatch
cluster-md-kmp-64kb-debuginfo
kernel-64kb-devel
gfs2-kmp-64kb
dlm-kmp-64kb
kselftests-kmp-64kb
ocfs2-kmp-64kb
kernel-64kb-debuginfo
dtb-cavium
dtb-zte
dtb-broadcom
dtb-altera
dtb-mediatek
dtb-marvell
dtb-qcom
dlm-kmp-64kb-debuginfo
dtb-amd
kselftests-kmp-64kb-debuginfo
dtb-renesas
dtb-xilinx
reiserfs-kmp-64kb-debuginfo
cluster-md-kmp-64kb
kernel-64kb-extra
gfs2-kmp-64kb-debuginfo
dtb-nvidia
dtb-amlogic
kernel-64kb-extra-debuginfo
dtb-al
dtb-lg
dtb-allwinner
kernel-64kb
kernel-source-vanilla
kernel-default-optional
kselftests-kmp-default
kernel-default-optional-debuginfo
kselftests-kmp-default-debuginfo
kernel-obs-qa
kernel-debug-debuginfo
kernel-docs-html
kernel-kvmsmall
kernel-debug
kernel-kvmsmall-devel
kernel-debug-devel
kernel-debug-livepatch-devel
kernel-kvmsmall-debugsource
kernel-debug-debugsource
kernel-64kb-optional-debuginfo
kernel-debug-devel-debuginfo
kernel-kvmsmall-devel-debuginfo
kernel-kvmsmall-livepatch-devel
kernel-kvmsmall-debuginfo
dtb-arm
dlm-kmp-preempt-debuginfo
kernel-preempt-extra-debuginfo
kernel-zfcpdump
kernel-zfcpdump-debugsource
kernel-zfcpdump-debuginfo
dtb-aarch64
dtb-rockchip
dtb-sprd
dtb-hisilicon
kernel-64kb-debugsource
kernel-64kb-livepatch-devel
reiserfs-kmp-64kb
dtb-freescale
kernel-64kb-optional
ocfs2-kmp-64kb-debuginfo
dtb-apm
dtb-exynos
dtb-socionext
kernel-64kb-devel-debuginfo
reiserfs-kmp-preempt
cluster-md-kmp-preempt
gfs2-kmp-preempt-debuginfo
ocfs2-kmp-preempt
kselftests-kmp-preempt-debuginfo
gfs2-kmp-preempt
kselftests-kmp-preempt
cluster-md-kmp-preempt-debuginfo
reiserfs-kmp-preempt-debuginfo
kernel-preempt-optional
kernel-preempt-extra
dlm-kmp-preempt
kernel-preempt-optional-debuginfo
kernel-preempt-livepatch-devel
ocfs2-kmp-preempt-debuginfo
kernel-default-base-rebuild
EMC Cloud Tiering Appliance

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 kvm_vm_ioctl_unregister_coalesced_mmio() function in virt/kvm/coalesced_mmio.c. A local user can escalate privileges on the system.


How to mitigate CVE-2021-47341

Install update from vendor's website.

Sources