Use-after-free in Linux kernel - CVE-2021-47328

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Main Vulnerability Database Vulnerabilities #VU91060

Use-after-free in Linux kernel - CVE-2021-47328

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


Vulnerability identifier: #VU91060
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-2021-47328
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 iscsi_prep_bidi_ahs(), iscsi_check_tmf_restrictions(), iscsi_data_in_rsp(), EXPORT_SYMBOL_GPL(), iscsi_exec_task_mgmt_fn(), iscsi_eh_abort(), iscsi_eh_device_reset(), iscsi_session_recovery_timedout(), iscsi_conn_failure(), iscsi_eh_target_reset(), iscsi_session_setup(), iscsi_conn_setup(), iscsi_conn_teardown(), iscsi_conn_start() and iscsi_start_session_recovery() functions in drivers/scsi/libiscsi.c. A local user can escalate privileges on the system.


Affected software

Linux kernel
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Real Time 12
SUSE Linux Enterprise High Availability Extension 12
SUSE Linux Enterprise Software Development Kit 12
SUSE Manager Server
SUSE Manager Retail Branch Server
SUSE Manager Proxy
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Micro for Rancher
SUSE Enterprise Storage
SUSE Linux Enterprise Workstation Extension 12
SUSE Linux Enterprise Live Patching
SUSE Linux Enterprise Server 15 SP2 LTSS
SUSE Linux Enterprise Server 15 SP2 Business Critical Linux
SUSE Linux Enterprise High Performance Computing 15 SP2 LTSS
SUSE Linux Enterprise Server 15 SP3 LTSS
SUSE Linux Enterprise Server 15 SP3 Business Critical Linux
openSUSE Leap
kgraft-patch-4_12_14-122_222-default
kernel-livepatch-5_3_18-150200_24_197-default
kernel-livepatch-SLE15-SP2_Update_50-debugsource
kernel-livepatch-5_3_18-150200_24_197-default-debuginfo
kernel-livepatch-5_3_18-150300_59_167-default-debuginfo
kernel-livepatch-SLE15-SP3_Update_46-debugsource
kernel-livepatch-5_3_18-150300_59_167-default
kernel-livepatch-5_3_18-150300_59_167-preempt
kernel-livepatch-5_3_18-150300_59_167-preempt-debuginfo
kernel-rt_debug-devel
kernel-rt-devel
dlm-kmp-rt
kernel-rt-debugsource
kernel-rt
kernel-rt_debug
kernel-devel-rt
kernel-source-rt
cluster-md-kmp-rt
ocfs2-kmp-rt-debuginfo
kernel-rt-base-debuginfo
kernel-rt-devel-debuginfo
dlm-kmp-rt-debuginfo
gfs2-kmp-rt
kernel-rt_debug-debugsource
kernel-rt_debug-debuginfo
kernel-rt-base
ocfs2-kmp-rt
kernel-rt_debug-devel-debuginfo
cluster-md-kmp-rt-debuginfo
kernel-syms-rt
kernel-rt-debuginfo
gfs2-kmp-rt-debuginfo
kernel-azure-base-debuginfo
kernel-azure
kernel-azure-base
kernel-azure-debuginfo
kernel-azure-devel
kernel-source-azure
kernel-devel-azure
kernel-azure-debugsource
kernel-syms-azure
kernel-default-extra-debuginfo
kernel-default-debugsource
gfs2-kmp-default-debuginfo
kernel-default-man
kernel-default-extra
kernel-obs-build
kernel-obs-build-debugsource
kernel-docs
kernel-default-kgraft
kernel-default-kgraft-devel
kernel-default-devel-debuginfo
kernel-macros
kernel-source
kernel-devel
kernel-default
ocfs2-kmp-default
dlm-kmp-default
cluster-md-kmp-default-debuginfo
kernel-default-base
kernel-default-base-debuginfo
cluster-md-kmp-default
kernel-default-debuginfo
ocfs2-kmp-default-debuginfo
kernel-syms
kernel-default-devel
gfs2-kmp-default
dlm-kmp-default-debuginfo
kernel-preempt-devel-debuginfo
kernel-default-livepatch-devel
kernel-default-livepatch
reiserfs-kmp-default-debuginfo
reiserfs-kmp-default
kernel-preempt-debugsource
kernel-preempt-debuginfo
kernel-preempt-devel
kernel-preempt
kernel-64kb-devel-debuginfo
kernel-64kb-extra
reiserfs-kmp-64kb-debuginfo
dtb-arm
dtb-al
dtb-lg
ocfs2-kmp-64kb
dtb-amd
dtb-allwinner
kernel-64kb-extra-debuginfo
kernel-64kb-debuginfo
kernel-64kb
kernel-docs-html
kselftests-kmp-default-debuginfo
kernel-default-optional-debuginfo
kernel-default-optional
cluster-md-kmp-preempt
kernel-preempt-extra
reiserfs-kmp-preempt
reiserfs-kmp-preempt-debuginfo
dlm-kmp-preempt
cluster-md-kmp-preempt-debuginfo
kernel-preempt-extra-debuginfo
kernel-preempt-optional-debuginfo
ocfs2-kmp-preempt
kernel-kvmsmall-debuginfo
kernel-source-vanilla
kernel-kvmsmall
kernel-debug
kernel-kvmsmall-livepatch-devel
kernel-debug-devel-debuginfo
kernel-debug-livepatch-devel
kernel-debug-debugsource
kernel-kvmsmall-devel
kernel-kvmsmall-devel-debuginfo
dtb-zte
kernel-debug-debuginfo
kernel-kvmsmall-debugsource
kernel-debug-devel
kernel-obs-qa
kselftests-kmp-default
dtb-amlogic
dlm-kmp-64kb-debuginfo
dtb-hisilicon
dlm-kmp-64kb
kernel-64kb-livepatch-devel
dtb-altera
gfs2-kmp-64kb-debuginfo
dtb-cavium
kernel-64kb-debugsource
kselftests-kmp-64kb-debuginfo
dtb-xilinx
dtb-exynos
kernel-64kb-optional
dtb-apm
gfs2-kmp-preempt
gfs2-kmp-64kb
dtb-qcom
dtb-freescale
kselftests-kmp-64kb
dtb-sprd
dtb-renesas
kernel-64kb-optional-debuginfo
dtb-mediatek
dtb-broadcom
dtb-rockchip
ocfs2-kmp-64kb-debuginfo
cluster-md-kmp-64kb
kernel-64kb-devel
dtb-nvidia
dlm-kmp-preempt-debuginfo
kselftests-kmp-preempt-debuginfo
ocfs2-kmp-preempt-debuginfo
kernel-preempt-livepatch-devel
gfs2-kmp-preempt-debuginfo
kernel-preempt-optional
kselftests-kmp-preempt
kernel-zfcpdump
kernel-zfcpdump-debuginfo
kernel-zfcpdump-debugsource
dtb-aarch64
reiserfs-kmp-64kb
dtb-marvell
dtb-socionext
cluster-md-kmp-64kb-debuginfo
kernel-default-base-rebuild
EMC Cloud Tiering Appliance

How to mitigate CVE-2021-47328

Install update from vendor's website.

Linux kernel - addressed in versions 4.19.198, 5.4.134, 5.10.52, 5.12.19, 5.13.4, 5.14
kgraft-patch-4_12_14-122_222-default - update to 1-8.3.1
kernel-livepatch-5_3_18-150200_24_197-default - update to 1-150200.5.3.1
kernel-livepatch-SLE15-SP2_Update_50-debugsource - update to 1-150200.5.3.1
kernel-livepatch-5_3_18-150200_24_197-default-debuginfo - update to 1-150200.5.3.1
kernel-livepatch-5_3_18-150300_59_167-default-debuginfo - update to 1-150300.7.3.1
kernel-livepatch-SLE15-SP3_Update_46-debugsource - update to 1-150300.7.3.1
kernel-livepatch-5_3_18-150300_59_167-default - update to 1-150300.7.3.1
kernel-livepatch-5_3_18-150300_59_167-preempt - update to 1-150300.7.3.1
kernel-livepatch-5_3_18-150300_59_167-preempt-debuginfo - update to 1-150300.7.3.1
kernel-rt_debug-devel - update to 4.12.14-10.191.1
kernel-rt-devel - update to 4.12.14-10.191.1
dlm-kmp-rt - update to 4.12.14-10.191.1
kernel-rt-debugsource - addressed in versions 4.12.14-10.191.1, 5.3.18-150300.175.1
kernel-rt - addressed in versions 4.12.14-10.191.1, 5.3.18-150300.175.1
kernel-rt_debug - update to 4.12.14-10.191.1
kernel-devel-rt - update to 4.12.14-10.191.1
kernel-source-rt - addressed in versions 4.12.14-10.191.1, 5.3.18-150300.175.1
cluster-md-kmp-rt - update to 4.12.14-10.191.1
ocfs2-kmp-rt-debuginfo - update to 4.12.14-10.191.1
kernel-rt-base-debuginfo - update to 4.12.14-10.191.1
kernel-rt-devel-debuginfo - update to 4.12.14-10.191.1
dlm-kmp-rt-debuginfo - update to 4.12.14-10.191.1
gfs2-kmp-rt - update to 4.12.14-10.191.1
kernel-rt_debug-debugsource - update to 4.12.14-10.191.1
kernel-rt_debug-debuginfo - update to 4.12.14-10.191.1
kernel-rt-base - update to 4.12.14-10.191.1
ocfs2-kmp-rt - update to 4.12.14-10.191.1
kernel-rt_debug-devel-debuginfo - update to 4.12.14-10.191.1
cluster-md-kmp-rt-debuginfo - update to 4.12.14-10.191.1
kernel-syms-rt - update to 4.12.14-10.191.1
kernel-rt-debuginfo - addressed in versions 4.12.14-10.191.1, 5.3.18-150300.175.1
gfs2-kmp-rt-debuginfo - update to 4.12.14-10.191.1
kernel-azure-base-debuginfo - update to 4.12.14-16.191.1
kernel-azure - update to 4.12.14-16.191.1
kernel-azure-base - update to 4.12.14-16.191.1
kernel-azure-debuginfo - update to 4.12.14-16.191.1
kernel-azure-devel - update to 4.12.14-16.191.1
kernel-source-azure - update to 4.12.14-16.191.1
kernel-devel-azure - update to 4.12.14-16.191.1
kernel-azure-debugsource - update to 4.12.14-16.191.1
kernel-syms-azure - update to 4.12.14-16.191.1
kernel-default-extra-debuginfo - addressed in versions 4.12.14-122.222.1, 5.3.18-150300.59.167.1
kernel-default-debugsource - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
gfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-default-man - update to 4.12.14-122.222.1
kernel-default-extra - addressed in versions 4.12.14-122.222.1, 5.3.18-150300.59.167.1
kernel-obs-build - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-obs-build-debugsource - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-docs - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-default-kgraft - update to 4.12.14-122.222.1
kernel-default-kgraft-devel - update to 4.12.14-122.222.1
kernel-default-devel-debuginfo - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-macros - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-source - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-devel - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-default - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
ocfs2-kmp-default - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
dlm-kmp-default - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
cluster-md-kmp-default-debuginfo - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-default-base - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.197.1.150200.9.101.1, 5.3.18-150300.59.167.1.150300.18.98.1
kernel-default-base-debuginfo - update to 4.12.14-122.222.1
cluster-md-kmp-default - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-default-debuginfo - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
ocfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-syms - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-default-devel - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
gfs2-kmp-default - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
dlm-kmp-default-debuginfo - addressed in versions 4.12.14-122.222.1, 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-preempt-devel-debuginfo - addressed in versions 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-default-livepatch-devel - addressed in versions 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-default-livepatch - addressed in versions 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
reiserfs-kmp-default-debuginfo - addressed in versions 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
reiserfs-kmp-default - addressed in versions 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-preempt-debugsource - addressed in versions 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-preempt-debuginfo - addressed in versions 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-preempt-devel - addressed in versions 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-preempt - addressed in versions 5.3.18-150200.24.197.1, 5.3.18-150300.59.167.1
kernel-64kb-devel-debuginfo - update to 5.3.18-150300.59.167.1
kernel-64kb-extra - update to 5.3.18-150300.59.167.1
reiserfs-kmp-64kb-debuginfo - update to 5.3.18-150300.59.167.1
dtb-arm - update to 5.3.18-150300.59.167.1
dtb-al - update to 5.3.18-150300.59.167.1
dtb-lg - update to 5.3.18-150300.59.167.1
ocfs2-kmp-64kb - update to 5.3.18-150300.59.167.1
dtb-amd - update to 5.3.18-150300.59.167.1
dtb-allwinner - update to 5.3.18-150300.59.167.1
kernel-64kb-extra-debuginfo - update to 5.3.18-150300.59.167.1
kernel-64kb-debuginfo - update to 5.3.18-150300.59.167.1
kernel-64kb - update to 5.3.18-150300.59.167.1
kernel-docs-html - update to 5.3.18-150300.59.167.1
kselftests-kmp-default-debuginfo - update to 5.3.18-150300.59.167.1
kernel-default-optional-debuginfo - update to 5.3.18-150300.59.167.1
kernel-default-optional - update to 5.3.18-150300.59.167.1
cluster-md-kmp-preempt - update to 5.3.18-150300.59.167.1
kernel-preempt-extra - update to 5.3.18-150300.59.167.1
reiserfs-kmp-preempt - update to 5.3.18-150300.59.167.1
reiserfs-kmp-preempt-debuginfo - update to 5.3.18-150300.59.167.1
dlm-kmp-preempt - update to 5.3.18-150300.59.167.1
cluster-md-kmp-preempt-debuginfo - update to 5.3.18-150300.59.167.1
kernel-preempt-extra-debuginfo - update to 5.3.18-150300.59.167.1
kernel-preempt-optional-debuginfo - update to 5.3.18-150300.59.167.1
ocfs2-kmp-preempt - update to 5.3.18-150300.59.167.1
kernel-kvmsmall-debuginfo - update to 5.3.18-150300.59.167.1
kernel-source-vanilla - update to 5.3.18-150300.59.167.1
kernel-kvmsmall - update to 5.3.18-150300.59.167.1
kernel-debug - update to 5.3.18-150300.59.167.1
kernel-kvmsmall-livepatch-devel - update to 5.3.18-150300.59.167.1
kernel-debug-devel-debuginfo - update to 5.3.18-150300.59.167.1
kernel-debug-livepatch-devel - update to 5.3.18-150300.59.167.1
kernel-debug-debugsource - update to 5.3.18-150300.59.167.1
kernel-kvmsmall-devel - update to 5.3.18-150300.59.167.1
kernel-kvmsmall-devel-debuginfo - update to 5.3.18-150300.59.167.1
dtb-zte - update to 5.3.18-150300.59.167.1
kernel-debug-debuginfo - update to 5.3.18-150300.59.167.1
kernel-kvmsmall-debugsource - update to 5.3.18-150300.59.167.1
kernel-debug-devel - update to 5.3.18-150300.59.167.1
kernel-obs-qa - update to 5.3.18-150300.59.167.1
kselftests-kmp-default - update to 5.3.18-150300.59.167.1
dtb-amlogic - update to 5.3.18-150300.59.167.1
dlm-kmp-64kb-debuginfo - update to 5.3.18-150300.59.167.1
dtb-hisilicon - update to 5.3.18-150300.59.167.1
dlm-kmp-64kb - update to 5.3.18-150300.59.167.1
kernel-64kb-livepatch-devel - update to 5.3.18-150300.59.167.1
dtb-altera - update to 5.3.18-150300.59.167.1
gfs2-kmp-64kb-debuginfo - update to 5.3.18-150300.59.167.1
dtb-cavium - update to 5.3.18-150300.59.167.1
kernel-64kb-debugsource - update to 5.3.18-150300.59.167.1
kselftests-kmp-64kb-debuginfo - update to 5.3.18-150300.59.167.1
dtb-xilinx - update to 5.3.18-150300.59.167.1
dtb-exynos - update to 5.3.18-150300.59.167.1
kernel-64kb-optional - update to 5.3.18-150300.59.167.1
dtb-apm - update to 5.3.18-150300.59.167.1
gfs2-kmp-preempt - update to 5.3.18-150300.59.167.1
gfs2-kmp-64kb - update to 5.3.18-150300.59.167.1
dtb-qcom - update to 5.3.18-150300.59.167.1
dtb-freescale - update to 5.3.18-150300.59.167.1
kselftests-kmp-64kb - update to 5.3.18-150300.59.167.1
dtb-sprd - update to 5.3.18-150300.59.167.1
dtb-renesas - update to 5.3.18-150300.59.167.1
kernel-64kb-optional-debuginfo - update to 5.3.18-150300.59.167.1
dtb-mediatek - update to 5.3.18-150300.59.167.1
dtb-broadcom - update to 5.3.18-150300.59.167.1
dtb-rockchip - update to 5.3.18-150300.59.167.1
ocfs2-kmp-64kb-debuginfo - update to 5.3.18-150300.59.167.1
cluster-md-kmp-64kb - update to 5.3.18-150300.59.167.1
kernel-64kb-devel - update to 5.3.18-150300.59.167.1
dtb-nvidia - update to 5.3.18-150300.59.167.1
dlm-kmp-preempt-debuginfo - update to 5.3.18-150300.59.167.1
kselftests-kmp-preempt-debuginfo - update to 5.3.18-150300.59.167.1
ocfs2-kmp-preempt-debuginfo - update to 5.3.18-150300.59.167.1
kernel-preempt-livepatch-devel - update to 5.3.18-150300.59.167.1
gfs2-kmp-preempt-debuginfo - update to 5.3.18-150300.59.167.1
kernel-preempt-optional - update to 5.3.18-150300.59.167.1
kselftests-kmp-preempt - update to 5.3.18-150300.59.167.1
kernel-zfcpdump - update to 5.3.18-150300.59.167.1
kernel-zfcpdump-debuginfo - update to 5.3.18-150300.59.167.1
kernel-zfcpdump-debugsource - update to 5.3.18-150300.59.167.1
dtb-aarch64 - update to 5.3.18-150300.59.167.1
reiserfs-kmp-64kb - update to 5.3.18-150300.59.167.1
dtb-marvell - update to 5.3.18-150300.59.167.1
dtb-socionext - update to 5.3.18-150300.59.167.1
cluster-md-kmp-64kb-debuginfo - update to 5.3.18-150300.59.167.1
kernel-default-base-rebuild - update to 5.3.18-150300.59.167.1.150300.18.98.1
EMC Cloud Tiering Appliance - update to 13.2.0.2.31

External References

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