Use-after-free in Linux kernel - CVE-2021-47013

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Main Vulnerability Database Vulnerabilities #VU91068

Use-after-free in Linux kernel - CVE-2021-47013

Published: June 4, 2024 / Updated: May 13, 2025


Vulnerability identifier: #VU91068
CSH Severity: Low
CVSS v4 BT: 5.9 [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-2021-47013
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

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

The vulnerability exists due to a use-after-free error within the emac_mac_tx_buf_send() function in drivers/net/ethernet/qualcomm/emac/emac-mac.c. A local user can escalate privileges on the system.


Affected software

Linux kernel
SUSE Linux Enterprise Server 15
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 Manager Proxy
SUSE Manager Retail Branch Server
SUSE Manager Server
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Micro for Rancher
SUSE Enterprise Storage
Anolis OS
Red Hat CodeReady Linux Builder for ARM 64
Red Hat CodeReady Linux Builder for Power, little endian
Red Hat CodeReady Linux Builder for x86_64
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for Real Time
Red Hat Enterprise Linux for Real Time for NFV
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support
Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support
Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux Server - AUS
SUSE Linux Enterprise High Performance Computing 15 SP2 LTSS
SUSE Linux Enterprise Live Patching
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
openEuler
Dell Data Protection Central
PowerProtect DP Series Appliance (IDPA)
Technical Support Appliance
IBM Cloud Pak for Watson AIOps
Storage Resource Manager
EMC Cloud Tiering Appliance
Juniper Secure Analytics (JSA)
IBM Qradar SIEM
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
kernel-livepatch-5_3_18-150200_24_188-default
kernel-livepatch-SLE15-SP2_Update_47-debugsource
kernel-livepatch-5_3_18-150200_24_188-default-debuginfo
kernel-livepatch-5_3_18-150300_59_158-default-debuginfo
kernel-livepatch-5_3_18-150300_59_158-default
kernel-livepatch-SLE15-SP3_Update_43-debugsource
kernel-livepatch-5_3_18-150300_59_158-preempt-debuginfo
kernel-livepatch-5_3_18-150300_59_158-preempt
kernel (Red Hat package)
kernel-rt (Red Hat package)
kernel-modules
kernel-doc
kernel-abi-stablelists
python3-perf
perf
kernel-tools-libs-devel
kernel-tools-libs
kernel-tools
kernel-modules-extra
kernel-headers
bpftool
kernel
kernel-core
kernel-cross-headers
kernel-debug
kernel-debug-core
kernel-debug-devel
kernel-debug-modules
kernel-debug-modules-extra
kernel-devel
kernel-source
perf-debuginfo
python2-perf
python2-perf-debuginfo
bpftool-debuginfo
kernel-tools-debuginfo
kernel-debuginfo
kernel-tools-devel
kernel-debugsource
python3-perf-debuginfo
cluster-md-kmp-default
kernel-default-debugsource
gfs2-kmp-default-debuginfo
dlm-kmp-default-debuginfo
ocfs2-kmp-default-debuginfo
dlm-kmp-default
cluster-md-kmp-default-debuginfo
kernel-preempt
kernel-obs-build-debugsource
kernel-preempt-devel
kernel-syms
kernel-preempt-debugsource
kernel-preempt-devel-debuginfo
kernel-preempt-debuginfo
ocfs2-kmp-default
gfs2-kmp-default
kernel-obs-build
kernel-default-livepatch
kernel-default-debuginfo
kernel-default-livepatch-devel
kernel-default
kernel-default-devel
reiserfs-kmp-default-debuginfo
reiserfs-kmp-default
kernel-docs
kernel-macros
kernel-default-devel-debuginfo
kernel-default-base
ocfs2-kmp-preempt-debuginfo
dtb-xilinx
dtb-exynos
dtb-amd
dtb-altera
dtb-lg
gfs2-kmp-64kb-debuginfo
dtb-hisilicon
dtb-allwinner
cluster-md-kmp-preempt
kernel-preempt-extra
dtb-aarch64
kselftests-kmp-preempt-debuginfo
kernel-zfcpdump
kernel-zfcpdump-debuginfo
kselftests-kmp-64kb
dtb-freescale
dtb-renesas
dtb-sprd
dtb-qcom
kernel-zfcpdump-debugsource
dtb-zte
dtb-amlogic
dtb-nvidia
dtb-apm
dlm-kmp-64kb
cluster-md-kmp-64kb-debuginfo
ocfs2-kmp-64kb-debuginfo
reiserfs-kmp-64kb
dtb-rockchip
kernel-64kb-extra
dtb-arm
kernel-64kb-optional
kernel-64kb-livepatch-devel
dlm-kmp-64kb-debuginfo
kselftests-kmp-64kb-debuginfo
dtb-cavium
gfs2-kmp-64kb
dtb-marvell
kernel-64kb-extra-debuginfo
ocfs2-kmp-64kb
dtb-mediatek
dtb-socionext
kernel-64kb-optional-debuginfo
reiserfs-kmp-64kb-debuginfo
cluster-md-kmp-64kb
dtb-broadcom
dtb-al
kernel-source-vanilla
kernel-64kb
kernel-64kb-devel
kernel-64kb-debugsource
kernel-64kb-devel-debuginfo
kernel-64kb-debuginfo
kernel-docs-html
kernel-kvmsmall
kernel-debug-debuginfo
kernel-debug-livepatch-devel
kernel-kvmsmall-devel
kernel-kvmsmall-livepatch-devel
gfs2-kmp-preempt
cluster-md-kmp-preempt-debuginfo
kernel-obs-qa
dlm-kmp-preempt-debuginfo
kernel-preempt-optional
dlm-kmp-preempt
reiserfs-kmp-preempt
kernel-debug-devel-debuginfo
gfs2-kmp-preempt-debuginfo
kernel-preempt-extra-debuginfo
ocfs2-kmp-preempt
kernel-preempt-optional-debuginfo
kselftests-kmp-preempt
reiserfs-kmp-preempt-debuginfo
kernel-preempt-livepatch-devel
kernel-kvmsmall-debuginfo
kernel-kvmsmall-debugsource
kernel-debug-debugsource
kernel-kvmsmall-devel-debuginfo
kselftests-kmp-default
kernel-default-extra
kselftests-kmp-default-debuginfo
kernel-default-extra-debuginfo
kernel-default-optional
kernel-default-optional-debuginfo
kernel-default-base-rebuild
Red Hat OpenShift Container Platform
Dell EMC Storage Monitoring and Reporting (SMR)
Dell Secure Connect Gateway

How to mitigate CVE-2021-47013

Install update from vendor's website.

Linux kernel - addressed in versions 4.9.269, 4.14.233, 4.19.191, 5.4.119, 5.10.37, 5.11.21, 5.12.4, 5.13
Juniper Secure Analytics (JSA) - update to 7.5.0 UP9 IF02
IBM Qradar SIEM - update to 7.5.0 Update Pack 9 IF01
kernel-livepatch-5_3_18-150200_24_188-default - update to 1-150200.5.3.3
kernel-livepatch-SLE15-SP2_Update_47-debugsource - update to 1-150200.5.3.3
kernel-livepatch-5_3_18-150200_24_188-default-debuginfo - update to 1-150200.5.3.3
kernel-livepatch-5_3_18-150300_59_158-default-debuginfo - update to 1-150300.7.3.5
kernel-livepatch-5_3_18-150300_59_158-default - update to 1-150300.7.3.5
kernel-livepatch-SLE15-SP3_Update_43-debugsource - update to 1-150300.7.3.5
kernel-livepatch-5_3_18-150300_59_158-preempt-debuginfo - update to 1-150300.7.3.5
kernel-livepatch-5_3_18-150300_59_158-preempt - update to 1-150300.7.3.5
Technical Support Appliance - update to 3.0.1
IBM Cloud Pak for Watson AIOps - update to 4.6.0
Red Hat OpenShift Container Platform - addressed in versions 4.12.58, 4.13.43, 4.14.28
kernel (Red Hat package) - addressed in versions 4.18.0-372.105.1.el8_6, 4.18.0-477.58.1.el8_8, 4.18.0-553.5.1.el8_10
kernel-rt (Red Hat package) - update to 4.18.0-553.5.1.rt7.346.el8_10
kernel-modules - update to 4.18.0-553.5.1.0.1
kernel-doc - update to 4.18.0-553.5.1.0.1
kernel-abi-stablelists - update to 4.18.0-553.5.1.0.1
python3-perf - update to 4.18.0-553.5.1.0.1
perf - update to 4.18.0-553.5.1.0.1
kernel-tools-libs-devel - update to 4.18.0-553.5.1.0.1
kernel-tools-libs - update to 4.18.0-553.5.1.0.1
kernel-tools - update to 4.18.0-553.5.1.0.1
kernel-modules-extra - update to 4.18.0-553.5.1.0.1
kernel-headers - update to 4.18.0-553.5.1.0.1
bpftool - update to 4.18.0-553.5.1.0.1
kernel - update to 4.18.0-553.5.1.0.1
kernel-core - update to 4.18.0-553.5.1.0.1
kernel-cross-headers - update to 4.18.0-553.5.1.0.1
kernel-debug - update to 4.18.0-553.5.1.0.1
kernel-debug-core - update to 4.18.0-553.5.1.0.1
kernel-debug-devel - update to 4.18.0-553.5.1.0.1
kernel-debug-modules - update to 4.18.0-553.5.1.0.1
kernel-debug-modules-extra - update to 4.18.0-553.5.1.0.1
kernel-devel - update to 4.18.0-553.5.1.0.1
bpftool - addressed in versions 4.19.90-2403.3.0.0244, 4.19.90-2403.4.0.0271
kernel-source - addressed in versions 4.19.90-2403.3.0.0244, 4.19.90-2403.4.0.0271
perf - addressed in versions 4.19.90-2403.3.0.0244, 4.19.90-2403.4.0.0271
kernel - addressed in versions 4.19.90-2403.3.0.0244, 4.19.90-2403.4.0.0271
kernel-tools - addressed in versions 4.19.90-2403.3.0.0244, 4.19.90-2403.4.0.0271
perf-debuginfo - addressed in versions 4.19.90-2403.3.0.0244, 4.19.90-2403.4.0.0271
python2-perf - addressed in versions 4.19.90-2403.3.0.0244, 4.19.90-2403.4.0.0271
kernel-devel - addressed in versions 4.19.90-2403.3.0.0244, 4.19.90-2403.4.0.0271
python3-perf - addressed in versions 4.19.90-2403.3.0.0244, 4.19.90-2403.4.0.0271
python2-perf-debuginfo - addressed in versions 4.19.90-2403.3.0.0244, 4.19.90-2403.4.0.0271
bpftool-debuginfo - addressed in versions 4.19.90-2403.3.0.0244, 4.19.90-2403.4.0.0271
kernel-tools-debuginfo - addressed in versions 4.19.90-2403.3.0.0244, 4.19.90-2403.4.0.0271
kernel-debuginfo - addressed in versions 4.19.90-2403.3.0.0244, 4.19.90-2403.4.0.0271
kernel-tools-devel - addressed in versions 4.19.90-2403.3.0.0244, 4.19.90-2403.4.0.0271
kernel-debugsource - addressed in versions 4.19.90-2403.3.0.0244, 4.19.90-2403.4.0.0271
python3-perf-debuginfo - addressed in versions 4.19.90-2403.3.0.0244, 4.19.90-2403.4.0.0271
Storage Resource Manager - update to 5.0.1.0
Dell EMC Storage Monitoring and Reporting (SMR) - update to 5.0.1.0
cluster-md-kmp-default - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
kernel-default-debugsource - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
gfs2-kmp-default-debuginfo - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
dlm-kmp-default-debuginfo - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
ocfs2-kmp-default-debuginfo - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
dlm-kmp-default - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
cluster-md-kmp-default-debuginfo - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
kernel-preempt - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
kernel-obs-build-debugsource - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
kernel-preempt-devel - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
kernel-syms - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
kernel-preempt-debugsource - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
kernel-preempt-devel-debuginfo - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
kernel-preempt-debuginfo - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
ocfs2-kmp-default - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
gfs2-kmp-default - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
kernel-obs-build - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
kernel-default-livepatch - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
kernel-default-debuginfo - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
kernel-default-livepatch-devel - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
kernel-default - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
kernel-default-devel - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
reiserfs-kmp-default-debuginfo - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
reiserfs-kmp-default - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
kernel-docs - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
kernel-source - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
kernel-devel - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
kernel-macros - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
kernel-default-devel-debuginfo - addressed in versions 5.3.18-150200.24.188.1, 5.3.18-150300.59.158.1
kernel-default-base - addressed in versions 5.3.18-150200.24.188.1.150200.9.95.3, 5.3.18-150300.59.158.1.150300.18.92.5
ocfs2-kmp-preempt-debuginfo - update to 5.3.18-150300.59.158.1
dtb-xilinx - update to 5.3.18-150300.59.158.1
dtb-exynos - update to 5.3.18-150300.59.158.1
dtb-amd - update to 5.3.18-150300.59.158.1
dtb-altera - update to 5.3.18-150300.59.158.1
dtb-lg - update to 5.3.18-150300.59.158.1
gfs2-kmp-64kb-debuginfo - update to 5.3.18-150300.59.158.1
dtb-hisilicon - update to 5.3.18-150300.59.158.1
dtb-allwinner - update to 5.3.18-150300.59.158.1
cluster-md-kmp-preempt - update to 5.3.18-150300.59.158.1
kernel-preempt-extra - update to 5.3.18-150300.59.158.1
dtb-aarch64 - update to 5.3.18-150300.59.158.1
kselftests-kmp-preempt-debuginfo - update to 5.3.18-150300.59.158.1
kernel-zfcpdump - update to 5.3.18-150300.59.158.1
kernel-zfcpdump-debuginfo - update to 5.3.18-150300.59.158.1
kselftests-kmp-64kb - update to 5.3.18-150300.59.158.1
dtb-freescale - update to 5.3.18-150300.59.158.1
dtb-renesas - update to 5.3.18-150300.59.158.1
dtb-sprd - update to 5.3.18-150300.59.158.1
dtb-qcom - update to 5.3.18-150300.59.158.1
kernel-zfcpdump-debugsource - update to 5.3.18-150300.59.158.1
dtb-zte - update to 5.3.18-150300.59.158.1
dtb-amlogic - update to 5.3.18-150300.59.158.1
dtb-nvidia - update to 5.3.18-150300.59.158.1
dtb-apm - update to 5.3.18-150300.59.158.1
dlm-kmp-64kb - update to 5.3.18-150300.59.158.1
cluster-md-kmp-64kb-debuginfo - update to 5.3.18-150300.59.158.1
ocfs2-kmp-64kb-debuginfo - update to 5.3.18-150300.59.158.1
reiserfs-kmp-64kb - update to 5.3.18-150300.59.158.1
dtb-rockchip - update to 5.3.18-150300.59.158.1
kernel-64kb-extra - update to 5.3.18-150300.59.158.1
dtb-arm - update to 5.3.18-150300.59.158.1
kernel-64kb-optional - update to 5.3.18-150300.59.158.1
kernel-64kb-livepatch-devel - update to 5.3.18-150300.59.158.1
dlm-kmp-64kb-debuginfo - update to 5.3.18-150300.59.158.1
kselftests-kmp-64kb-debuginfo - update to 5.3.18-150300.59.158.1
dtb-cavium - update to 5.3.18-150300.59.158.1
gfs2-kmp-64kb - update to 5.3.18-150300.59.158.1
dtb-marvell - update to 5.3.18-150300.59.158.1
kernel-64kb-extra-debuginfo - update to 5.3.18-150300.59.158.1
ocfs2-kmp-64kb - update to 5.3.18-150300.59.158.1
dtb-mediatek - update to 5.3.18-150300.59.158.1
dtb-socionext - update to 5.3.18-150300.59.158.1
kernel-64kb-optional-debuginfo - update to 5.3.18-150300.59.158.1
reiserfs-kmp-64kb-debuginfo - update to 5.3.18-150300.59.158.1
cluster-md-kmp-64kb - update to 5.3.18-150300.59.158.1
dtb-broadcom - update to 5.3.18-150300.59.158.1
dtb-al - update to 5.3.18-150300.59.158.1
kernel-source-vanilla - update to 5.3.18-150300.59.158.1
kernel-64kb - update to 5.3.18-150300.59.158.1
kernel-64kb-devel - update to 5.3.18-150300.59.158.1
kernel-64kb-debugsource - update to 5.3.18-150300.59.158.1
kernel-64kb-devel-debuginfo - update to 5.3.18-150300.59.158.1
kernel-64kb-debuginfo - update to 5.3.18-150300.59.158.1
kernel-docs-html - update to 5.3.18-150300.59.158.1
kernel-kvmsmall - update to 5.3.18-150300.59.158.1
kernel-debug - update to 5.3.18-150300.59.158.1
kernel-debug-debuginfo - update to 5.3.18-150300.59.158.1
kernel-debug-livepatch-devel - update to 5.3.18-150300.59.158.1
kernel-debug-devel - update to 5.3.18-150300.59.158.1
kernel-kvmsmall-devel - update to 5.3.18-150300.59.158.1
kernel-kvmsmall-livepatch-devel - update to 5.3.18-150300.59.158.1
gfs2-kmp-preempt - update to 5.3.18-150300.59.158.1
cluster-md-kmp-preempt-debuginfo - update to 5.3.18-150300.59.158.1
kernel-obs-qa - update to 5.3.18-150300.59.158.1
dlm-kmp-preempt-debuginfo - update to 5.3.18-150300.59.158.1
kernel-preempt-optional - update to 5.3.18-150300.59.158.1
dlm-kmp-preempt - update to 5.3.18-150300.59.158.1
reiserfs-kmp-preempt - update to 5.3.18-150300.59.158.1
kernel-debug-devel-debuginfo - update to 5.3.18-150300.59.158.1
gfs2-kmp-preempt-debuginfo - update to 5.3.18-150300.59.158.1
kernel-preempt-extra-debuginfo - update to 5.3.18-150300.59.158.1
ocfs2-kmp-preempt - update to 5.3.18-150300.59.158.1
kernel-preempt-optional-debuginfo - update to 5.3.18-150300.59.158.1
kselftests-kmp-preempt - update to 5.3.18-150300.59.158.1
reiserfs-kmp-preempt-debuginfo - update to 5.3.18-150300.59.158.1
kernel-preempt-livepatch-devel - update to 5.3.18-150300.59.158.1
kernel-kvmsmall-debuginfo - update to 5.3.18-150300.59.158.1
kernel-kvmsmall-debugsource - update to 5.3.18-150300.59.158.1
kernel-debug-debugsource - update to 5.3.18-150300.59.158.1
kernel-kvmsmall-devel-debuginfo - update to 5.3.18-150300.59.158.1
kselftests-kmp-default - update to 5.3.18-150300.59.158.1
kernel-default-extra - update to 5.3.18-150300.59.158.1
kselftests-kmp-default-debuginfo - update to 5.3.18-150300.59.158.1
kernel-default-extra-debuginfo - update to 5.3.18-150300.59.158.1
kernel-default-optional - update to 5.3.18-150300.59.158.1
kernel-default-optional-debuginfo - update to 5.3.18-150300.59.158.1
kernel-default-base-rebuild - update to 5.3.18-150300.59.158.1.150300.18.92.5
Dell Secure Connect Gateway - update to 5.24.00.14
EMC Cloud Tiering Appliance - update to 13.2.0.2.29

External References

Related Security Bulletins