Improper locking in Linux kernel - CVE-2021-47569

Vulnerability identifier: #VU93463

CSH Severity: Low

CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-47569

CWE-ID: CWE-667

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper locking within the io_file_get() function in fs/io_uring.c. A local user can perform a denial of service (DoS) attack.

Linux kernel
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Micro
Public Cloud Module
Basesystem Module
Development Tools Module
Legacy Module
SUSE Real Time Module
SUSE Linux Enterprise Live Patching
openSUSE Leap
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
kernel-livepatch-5_14_21-150500_13_58-rt-debuginfo
kernel-livepatch-5_14_21-150500_13_58-rt
kernel-livepatch-SLE15-SP5-RT_Update_16-debugsource
kernel-rt-optional-debuginfo
gfs2-kmp-rt
kernel-rt-vdso-debuginfo
kernel-rt-devel
kernel-rt-devel-debuginfo
kselftests-kmp-rt
kernel-rt_debug-debugsource
ocfs2-kmp-rt-debuginfo
kernel-rt-extra
kernel-source-rt
kernel-rt-optional
kernel-rt-debugsource
reiserfs-kmp-rt-debuginfo
kernel-rt_debug
kernel-rt
kernel-devel-rt
kselftests-kmp-rt-debuginfo
ocfs2-kmp-rt
kernel-rt-vdso
reiserfs-kmp-rt
cluster-md-kmp-rt
kernel-rt-livepatch-devel
kernel-syms-rt
dlm-kmp-rt-debuginfo
kernel-rt-extra-debuginfo
kernel-rt-livepatch
gfs2-kmp-rt-debuginfo
kernel-rt_debug-devel
cluster-md-kmp-rt-debuginfo
kernel-rt_debug-vdso-debuginfo
dlm-kmp-rt
kernel-rt_debug-livepatch-devel
kernel-rt_debug-devel-debuginfo
kernel-rt_debug-debuginfo
kernel-rt-debuginfo
kernel-rt_debug-vdso
dlm-kmp-azure
kernel-azure-extra-debuginfo
ocfs2-kmp-azure
reiserfs-kmp-azure-debuginfo
kernel-azure-optional-debuginfo
kernel-azure-debuginfo
kernel-azure
kernel-azure-vdso-debuginfo
kernel-azure-vdso
kernel-devel-azure
kernel-source-azure
kernel-azure-debugsource
kernel-azure-devel
kernel-azure-optional
reiserfs-kmp-azure
gfs2-kmp-azure-debuginfo
kernel-azure-extra
kernel-syms-azure
ocfs2-kmp-azure-debuginfo
kselftests-kmp-azure
kselftests-kmp-azure-debuginfo
cluster-md-kmp-azure-debuginfo
cluster-md-kmp-azure
dlm-kmp-azure-debuginfo
gfs2-kmp-azure
kernel-azure-devel-debuginfo
kernel-azure-livepatch-devel
dtb-hisilicon
cluster-md-kmp-64kb-debuginfo
dtb-nvidia
dtb-amd
kernel-64kb-debuginfo
dtb-renesas
kernel-64kb-devel-debuginfo
dtb-sprd
dtb-arm
reiserfs-kmp-64kb-debuginfo
dtb-xilinx
dtb-apm
kernel-obs-qa
dtb-broadcom
dtb-lg
dtb-apple
dlm-kmp-64kb
kernel-64kb-optional
reiserfs-kmp-64kb
kernel-64kb-optional-debuginfo
dtb-aarch64
kernel-zfcpdump-debugsource
kernel-zfcpdump-debuginfo
kernel-zfcpdump
kernel-kvmsmall
dtb-marvell
kernel-64kb
dtb-exynos
dtb-freescale
dtb-amazon
kernel-64kb-extra-debuginfo
ocfs2-kmp-64kb
dtb-amlogic
dtb-cavium
dtb-allwinner
kernel-64kb-livepatch-devel
kernel-64kb-debugsource
kselftests-kmp-64kb-debuginfo
gfs2-kmp-64kb
dtb-mediatek
kernel-64kb-devel
dtb-socionext
dtb-qcom
dtb-altera
ocfs2-kmp-64kb-debuginfo
cluster-md-kmp-64kb
kernel-64kb-extra
gfs2-kmp-64kb-debuginfo
dlm-kmp-64kb-debuginfo
kselftests-kmp-64kb
dtb-rockchip
gfs2-kmp-default
kernel-devel
kernel-docs-html
kernel-macros
kernel-default-extra
kernel-default-extra-debuginfo
cluster-md-kmp-default-debuginfo
dlm-kmp-default
dlm-kmp-default-debuginfo
ocfs2-kmp-default-debuginfo
gfs2-kmp-default-debuginfo
ocfs2-kmp-default
cluster-md-kmp-default
kernel-source-vanilla
kernel-default-livepatch
kernel-default-livepatch-devel
kernel-default-debuginfo
reiserfs-kmp-default-debuginfo
kernel-default-debugsource
reiserfs-kmp-default
kernel-default
kernel-source
kernel-obs-build-debugsource
kernel-obs-build
kernel-syms
kernel-docs
kernel-default-vdso-debuginfo
kselftests-kmp-default
kernel-default-devel-debuginfo
kselftests-kmp-default-debuginfo
kernel-default-optional-debuginfo
kernel-default-devel
kernel-kvmsmall-devel
kernel-kvmsmall-devel-debuginfo
kernel-kvmsmall-debugsource
kernel-kvmsmall-livepatch-devel
kernel-kvmsmall-debuginfo
kernel-default-optional
kernel-kvmsmall-vdso
kernel-kvmsmall-vdso-debuginfo
kernel-debug-vdso
kernel-debug-vdso-debuginfo
kernel-default-vdso
kernel-debug-devel-debuginfo
kernel-debug-livepatch-devel
kernel-debug-debuginfo
kernel-debug-devel
kernel-debug-debugsource
kernel-debug
kernel-default-base-rebuild
kernel-default-base

Install update from vendor's website.

Linux kernel - addressed in versions 5.15.6, 5.16
kernel-livepatch-SLE15-SP5_Update_15-debugsource - update to 1-150500.11.3.1
kernel-livepatch-5_14_21-150500_55_68-default - update to 1-150500.11.3.1
kernel-livepatch-5_14_21-150500_55_68-default-debuginfo - update to 1-150500.11.3.1
kernel-livepatch-5_14_21-150500_13_58-rt-debuginfo - update to 1-150500.11.3.1
kernel-livepatch-5_14_21-150500_13_58-rt - update to 1-150500.11.3.1
kernel-livepatch-SLE15-SP5-RT_Update_16-debugsource - update to 1-150500.11.3.1
kernel-rt-optional-debuginfo - update to 5.14.21-150500.13.58.1
gfs2-kmp-rt - update to 5.14.21-150500.13.58.1
kernel-rt-vdso-debuginfo - update to 5.14.21-150500.13.58.1
kernel-rt-devel - update to 5.14.21-150500.13.58.1
kernel-rt-devel-debuginfo - update to 5.14.21-150500.13.58.1
kselftests-kmp-rt - update to 5.14.21-150500.13.58.1
kernel-rt_debug-debugsource - update to 5.14.21-150500.13.58.1
ocfs2-kmp-rt-debuginfo - update to 5.14.21-150500.13.58.1
kernel-rt-extra - update to 5.14.21-150500.13.58.1
kernel-source-rt - update to 5.14.21-150500.13.58.1
kernel-rt-optional - update to 5.14.21-150500.13.58.1
kernel-rt-debugsource - update to 5.14.21-150500.13.58.1
reiserfs-kmp-rt-debuginfo - update to 5.14.21-150500.13.58.1
kernel-rt_debug - update to 5.14.21-150500.13.58.1
kernel-rt - update to 5.14.21-150500.13.58.1
kernel-devel-rt - update to 5.14.21-150500.13.58.1
kselftests-kmp-rt-debuginfo - update to 5.14.21-150500.13.58.1
ocfs2-kmp-rt - update to 5.14.21-150500.13.58.1
kernel-rt-vdso - update to 5.14.21-150500.13.58.1
reiserfs-kmp-rt - update to 5.14.21-150500.13.58.1
cluster-md-kmp-rt - update to 5.14.21-150500.13.58.1
kernel-rt-livepatch-devel - update to 5.14.21-150500.13.58.1
kernel-syms-rt - update to 5.14.21-150500.13.58.1
dlm-kmp-rt-debuginfo - update to 5.14.21-150500.13.58.1
kernel-rt-extra-debuginfo - update to 5.14.21-150500.13.58.1
kernel-rt-livepatch - update to 5.14.21-150500.13.58.1
gfs2-kmp-rt-debuginfo - update to 5.14.21-150500.13.58.1
kernel-rt_debug-devel - update to 5.14.21-150500.13.58.1
cluster-md-kmp-rt-debuginfo - update to 5.14.21-150500.13.58.1
kernel-rt_debug-vdso-debuginfo - update to 5.14.21-150500.13.58.1
dlm-kmp-rt - update to 5.14.21-150500.13.58.1
kernel-rt_debug-livepatch-devel - update to 5.14.21-150500.13.58.1
kernel-rt_debug-devel-debuginfo - update to 5.14.21-150500.13.58.1
kernel-rt_debug-debuginfo - update to 5.14.21-150500.13.58.1
kernel-rt-debuginfo - update to 5.14.21-150500.13.58.1
kernel-rt_debug-vdso - update to 5.14.21-150500.13.58.1
dlm-kmp-azure - update to 5.14.21-150500.33.57.1
kernel-azure-extra-debuginfo - update to 5.14.21-150500.33.57.1
ocfs2-kmp-azure - update to 5.14.21-150500.33.57.1
reiserfs-kmp-azure-debuginfo - update to 5.14.21-150500.33.57.1
kernel-azure-optional-debuginfo - update to 5.14.21-150500.33.57.1
kernel-azure-debuginfo - update to 5.14.21-150500.33.57.1
kernel-azure - update to 5.14.21-150500.33.57.1
kernel-azure-vdso-debuginfo - update to 5.14.21-150500.33.57.1
kernel-azure-vdso - update to 5.14.21-150500.33.57.1
kernel-devel-azure - update to 5.14.21-150500.33.57.1
kernel-source-azure - update to 5.14.21-150500.33.57.1
kernel-azure-debugsource - update to 5.14.21-150500.33.57.1
kernel-azure-devel - update to 5.14.21-150500.33.57.1
kernel-azure-optional - update to 5.14.21-150500.33.57.1
reiserfs-kmp-azure - update to 5.14.21-150500.33.57.1
gfs2-kmp-azure-debuginfo - update to 5.14.21-150500.33.57.1
kernel-azure-extra - update to 5.14.21-150500.33.57.1
kernel-syms-azure - update to 5.14.21-150500.33.57.1
ocfs2-kmp-azure-debuginfo - update to 5.14.21-150500.33.57.1
kselftests-kmp-azure - update to 5.14.21-150500.33.57.1
kselftests-kmp-azure-debuginfo - update to 5.14.21-150500.33.57.1
cluster-md-kmp-azure-debuginfo - update to 5.14.21-150500.33.57.1
cluster-md-kmp-azure - update to 5.14.21-150500.33.57.1
dlm-kmp-azure-debuginfo - update to 5.14.21-150500.33.57.1
gfs2-kmp-azure - update to 5.14.21-150500.33.57.1
kernel-azure-devel-debuginfo - update to 5.14.21-150500.33.57.1
kernel-azure-livepatch-devel - update to 5.14.21-150500.33.57.1
dtb-hisilicon - update to 5.14.21-150500.55.68.1
cluster-md-kmp-64kb-debuginfo - update to 5.14.21-150500.55.68.1
dtb-nvidia - update to 5.14.21-150500.55.68.1
dtb-amd - update to 5.14.21-150500.55.68.1
kernel-64kb-debuginfo - update to 5.14.21-150500.55.68.1
dtb-renesas - update to 5.14.21-150500.55.68.1
kernel-64kb-devel-debuginfo - update to 5.14.21-150500.55.68.1
dtb-sprd - update to 5.14.21-150500.55.68.1
dtb-arm - update to 5.14.21-150500.55.68.1
reiserfs-kmp-64kb-debuginfo - update to 5.14.21-150500.55.68.1
dtb-xilinx - update to 5.14.21-150500.55.68.1
dtb-apm - update to 5.14.21-150500.55.68.1
kernel-obs-qa - update to 5.14.21-150500.55.68.1
dtb-broadcom - update to 5.14.21-150500.55.68.1
dtb-lg - update to 5.14.21-150500.55.68.1
dtb-apple - update to 5.14.21-150500.55.68.1
dlm-kmp-64kb - update to 5.14.21-150500.55.68.1
kernel-64kb-optional - update to 5.14.21-150500.55.68.1
reiserfs-kmp-64kb - update to 5.14.21-150500.55.68.1
kernel-64kb-optional-debuginfo - update to 5.14.21-150500.55.68.1
dtb-aarch64 - update to 5.14.21-150500.55.68.1
kernel-zfcpdump-debugsource - update to 5.14.21-150500.55.68.1
kernel-zfcpdump-debuginfo - update to 5.14.21-150500.55.68.1
kernel-zfcpdump - update to 5.14.21-150500.55.68.1
kernel-kvmsmall - update to 5.14.21-150500.55.68.1
dtb-marvell - update to 5.14.21-150500.55.68.1
kernel-64kb - update to 5.14.21-150500.55.68.1
dtb-exynos - update to 5.14.21-150500.55.68.1
dtb-freescale - update to 5.14.21-150500.55.68.1
dtb-amazon - update to 5.14.21-150500.55.68.1
kernel-64kb-extra-debuginfo - update to 5.14.21-150500.55.68.1
ocfs2-kmp-64kb - update to 5.14.21-150500.55.68.1
dtb-amlogic - update to 5.14.21-150500.55.68.1
dtb-cavium - update to 5.14.21-150500.55.68.1
dtb-allwinner - update to 5.14.21-150500.55.68.1
kernel-64kb-livepatch-devel - update to 5.14.21-150500.55.68.1
kernel-64kb-debugsource - update to 5.14.21-150500.55.68.1
kselftests-kmp-64kb-debuginfo - update to 5.14.21-150500.55.68.1
gfs2-kmp-64kb - update to 5.14.21-150500.55.68.1
dtb-mediatek - update to 5.14.21-150500.55.68.1
kernel-64kb-devel - update to 5.14.21-150500.55.68.1
dtb-socionext - update to 5.14.21-150500.55.68.1
dtb-qcom - update to 5.14.21-150500.55.68.1
dtb-altera - update to 5.14.21-150500.55.68.1
ocfs2-kmp-64kb-debuginfo - update to 5.14.21-150500.55.68.1
cluster-md-kmp-64kb - update to 5.14.21-150500.55.68.1
kernel-64kb-extra - update to 5.14.21-150500.55.68.1
gfs2-kmp-64kb-debuginfo - update to 5.14.21-150500.55.68.1
dlm-kmp-64kb-debuginfo - update to 5.14.21-150500.55.68.1
kselftests-kmp-64kb - update to 5.14.21-150500.55.68.1
dtb-rockchip - update to 5.14.21-150500.55.68.1
gfs2-kmp-default - update to 5.14.21-150500.55.68.1
kernel-devel - update to 5.14.21-150500.55.68.1
kernel-docs-html - update to 5.14.21-150500.55.68.1
kernel-macros - update to 5.14.21-150500.55.68.1
kernel-default-extra - update to 5.14.21-150500.55.68.1
kernel-default-extra-debuginfo - update to 5.14.21-150500.55.68.1
cluster-md-kmp-default-debuginfo - update to 5.14.21-150500.55.68.1
dlm-kmp-default - update to 5.14.21-150500.55.68.1
dlm-kmp-default-debuginfo - update to 5.14.21-150500.55.68.1
ocfs2-kmp-default-debuginfo - update to 5.14.21-150500.55.68.1
gfs2-kmp-default-debuginfo - update to 5.14.21-150500.55.68.1
ocfs2-kmp-default - update to 5.14.21-150500.55.68.1
cluster-md-kmp-default - update to 5.14.21-150500.55.68.1
kernel-source-vanilla - update to 5.14.21-150500.55.68.1
kernel-default-livepatch - update to 5.14.21-150500.55.68.1
kernel-default-livepatch-devel - update to 5.14.21-150500.55.68.1
kernel-default-debuginfo - update to 5.14.21-150500.55.68.1
reiserfs-kmp-default-debuginfo - update to 5.14.21-150500.55.68.1
kernel-default-debugsource - update to 5.14.21-150500.55.68.1
reiserfs-kmp-default - update to 5.14.21-150500.55.68.1
kernel-default - update to 5.14.21-150500.55.68.1
kernel-source - update to 5.14.21-150500.55.68.1
kernel-obs-build-debugsource - update to 5.14.21-150500.55.68.1
kernel-obs-build - update to 5.14.21-150500.55.68.1
kernel-syms - update to 5.14.21-150500.55.68.1
kernel-docs - update to 5.14.21-150500.55.68.1
kernel-default-vdso-debuginfo - update to 5.14.21-150500.55.68.1
kselftests-kmp-default - update to 5.14.21-150500.55.68.1
kernel-default-devel-debuginfo - update to 5.14.21-150500.55.68.1
kselftests-kmp-default-debuginfo - update to 5.14.21-150500.55.68.1
kernel-default-optional-debuginfo - update to 5.14.21-150500.55.68.1
kernel-default-devel - update to 5.14.21-150500.55.68.1
kernel-kvmsmall-devel - update to 5.14.21-150500.55.68.1
kernel-kvmsmall-devel-debuginfo - update to 5.14.21-150500.55.68.1
kernel-kvmsmall-debugsource - update to 5.14.21-150500.55.68.1
kernel-kvmsmall-livepatch-devel - update to 5.14.21-150500.55.68.1
kernel-kvmsmall-debuginfo - update to 5.14.21-150500.55.68.1
kernel-default-optional - update to 5.14.21-150500.55.68.1
kernel-kvmsmall-vdso - update to 5.14.21-150500.55.68.1
kernel-kvmsmall-vdso-debuginfo - update to 5.14.21-150500.55.68.1
kernel-debug-vdso - update to 5.14.21-150500.55.68.1
kernel-debug-vdso-debuginfo - update to 5.14.21-150500.55.68.1
kernel-default-vdso - update to 5.14.21-150500.55.68.1
kernel-debug-devel-debuginfo - update to 5.14.21-150500.55.68.1
kernel-debug-livepatch-devel - update to 5.14.21-150500.55.68.1
kernel-debug-debuginfo - update to 5.14.21-150500.55.68.1
kernel-debug-devel - update to 5.14.21-150500.55.68.1
kernel-debug-debugsource - update to 5.14.21-150500.55.68.1
kernel-debug - update to 5.14.21-150500.55.68.1
kernel-default-base-rebuild - update to 5.14.21-150500.55.68.1.150500.6.31.1
kernel-default-base - update to 5.14.21-150500.55.68.1.150500.6.31.1

• https://git.kernel.org/stable/c/3d2a1e68fd9904fdc1b02f2e7d40ca47df7ba39f
• https://git.kernel.org/stable/c/617a89484debcd4e7999796d693cf0b77d2519de
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.6
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16

• Improper locking in Linux kernel fs
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel