Improper locking in Linux kernel - CVE-2021-47590

Vulnerability identifier: #VU92354

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-2021-47590

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 __mptcp_push_pending() function in net/mptcp/protocol.c. A local user can perform a denial of service (DoS) attack.

Linux kernel
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise High Availability Extension 15
openSUSE Leap Micro
SUSE Linux Enterprise Micro
Anolis OS
SUSE Linux Enterprise Live Patching
Legacy Module
Development Tools Module
Basesystem Module
SUSE Real Time Module
Public Cloud Module
openSUSE Leap
kernel-livepatch-5_14_21-150500_13_64-rt
kernel-livepatch-5_14_21-150500_55_73-default-debuginfo
kernel-livepatch-5_14_21-150500_55_73-default
kernel-livepatch-SLE15-SP5_Update_17-debugsource
kernel-livepatch-SLE15-SP5-RT_Update_18-debugsource
kernel-livepatch-5_14_21-150500_13_64-rt-debuginfo
kernel-doc
bpftool
kernel
kernel-core
kernel-cross-headers
kernel-debug
kernel-debug-core
kernel-debug-devel
kernel-debug-modules-extra
kernel-abi-stablelists
python3-perf
perf
kernel-tools-libs
kernel-tools
kernel-modules-extra
kernel-modules
kernel-headers
kernel-devel
kernel-debug-modules
kernel-rt
kernel-rt_debug
kernel-rt-vdso
kernel-rt-extra-debuginfo
kselftests-kmp-rt
kernel-devel-rt
kernel-rt-extra
kernel-rt-devel-debuginfo
gfs2-kmp-rt-debuginfo
kernel-rt_debug-vdso-debuginfo
reiserfs-kmp-rt-debuginfo
kernel-rt_debug-vdso
kernel-rt_debug-livepatch-devel
cluster-md-kmp-rt
kernel-rt_debug-debugsource
kernel-rt_debug-devel-debuginfo
kselftests-kmp-rt-debuginfo
kernel-rt-debuginfo
kernel-rt-devel
kernel-rt-vdso-debuginfo
reiserfs-kmp-rt
kernel-rt-optional-debuginfo
kernel-rt_debug-debuginfo
gfs2-kmp-rt
ocfs2-kmp-rt
kernel-rt_debug-devel
cluster-md-kmp-rt-debuginfo
ocfs2-kmp-rt-debuginfo
kernel-rt-livepatch
kernel-source-rt
kernel-syms-rt
kernel-rt-livepatch-devel
dlm-kmp-rt-debuginfo
kernel-rt-debugsource
kernel-rt-optional
dlm-kmp-rt
kernel-azure-debugsource
kselftests-kmp-azure-debuginfo
kernel-azure-debuginfo
kernel-azure-extra
kernel-azure-optional
kselftests-kmp-azure
kernel-azure-devel-debuginfo
dlm-kmp-azure-debuginfo
cluster-md-kmp-azure-debuginfo
kernel-azure-extra-debuginfo
dlm-kmp-azure
reiserfs-kmp-azure
reiserfs-kmp-azure-debuginfo
kernel-azure-devel
ocfs2-kmp-azure
kernel-azure-optional-debuginfo
gfs2-kmp-azure
ocfs2-kmp-azure-debuginfo
cluster-md-kmp-azure
gfs2-kmp-azure-debuginfo
kernel-syms-azure
kernel-devel-azure
kernel-source-azure
kernel-azure-vdso
kernel-azure-vdso-debuginfo
kernel-azure
kernel-azure-livepatch-devel
kernel-64kb-devel-debuginfo
kernel-debug-vdso
gfs2-kmp-64kb-debuginfo
dtb-marvell
dtb-hisilicon
dtb-sprd
dtb-amazon
kselftests-kmp-64kb-debuginfo
kernel-64kb-optional
dtb-qcom
dtb-broadcom
dtb-altera
dtb-mediatek
dtb-arm
dtb-amlogic
dtb-apm
dtb-amd
kernel-source-vanilla
dtb-apple
kernel-kvmsmall-vdso-debuginfo
kernel-debug-devel-debuginfo
kernel-debug-debugsource
kernel-debug-debuginfo
kernel-debug-livepatch-devel
dlm-kmp-64kb-debuginfo
kernel-macros
kernel-source
kernel-64kb
ocfs2-kmp-64kb-debuginfo
dtb-freescale
dtb-exynos
dlm-kmp-default
kernel-obs-build-debugsource
dtb-cavium
kernel-obs-build
reiserfs-kmp-default
kernel-default-extra-debuginfo
reiserfs-kmp-default-debuginfo
kernel-default-extra
cluster-md-kmp-default
kernel-default-devel
ocfs2-kmp-default-debuginfo
kernel-default-debugsource
dlm-kmp-default-debuginfo
cluster-md-kmp-default-debuginfo
kernel-default-optional-debuginfo
kernel-obs-qa
kernel-default-livepatch
gfs2-kmp-default-debuginfo
kernel-default-optional
kernel-default-devel-debuginfo
kselftests-kmp-default-debuginfo
kernel-syms
kernel-default-livepatch-devel
gfs2-kmp-default
ocfs2-kmp-default
kselftests-kmp-default
kernel-kvmsmall-devel-debuginfo
kernel-kvmsmall-debuginfo
kernel-kvmsmall-livepatch-devel
kernel-kvmsmall-devel
kernel-kvmsmall-debugsource
kernel-debug-vdso-debuginfo
kernel-64kb-debugsource
dtb-socionext
dtb-nvidia
cluster-md-kmp-64kb-debuginfo
reiserfs-kmp-64kb
ocfs2-kmp-64kb
dtb-rockchip
dtb-renesas
dlm-kmp-64kb
reiserfs-kmp-64kb-debuginfo
kernel-64kb-debuginfo
kselftests-kmp-64kb
kernel-64kb-devel
kernel-64kb-livepatch-devel
kernel-default-debuginfo
kernel-64kb-extra-debuginfo
dtb-allwinner
kernel-default
kernel-kvmsmall
kernel-default-vdso-debuginfo
kernel-default-vdso
kernel-kvmsmall-vdso
kernel-zfcpdump
kernel-zfcpdump-debugsource
kernel-zfcpdump-debuginfo
dtb-aarch64
dtb-xilinx
dtb-lg
cluster-md-kmp-64kb
gfs2-kmp-64kb
kernel-64kb-optional-debuginfo
kernel-64kb-extra
kernel-default-base-rebuild
kernel-default-base
kernel-docs-html
kernel-docs

Install update from vendor's website.

Linux kernel - addressed in versions 5.15.11, 5.16
kernel-livepatch-5_14_21-150500_13_64-rt - update to 1-150500.11.3.1
kernel-livepatch-5_14_21-150500_55_73-default-debuginfo - update to 1-150500.11.3.1
kernel-livepatch-5_14_21-150500_55_73-default - update to 1-150500.11.3.1
kernel-livepatch-SLE15-SP5_Update_17-debugsource - update to 1-150500.11.3.1
kernel-livepatch-SLE15-SP5-RT_Update_18-debugsource - update to 1-150500.11.3.1
kernel-livepatch-5_14_21-150500_13_64-rt-debuginfo - update to 1-150500.11.3.1
kernel-doc - update to 4.18.0-372.9.1
bpftool - update to 4.18.0-372.9.1
kernel - update to 4.18.0-372.9.1
kernel-core - update to 4.18.0-372.9.1
kernel-cross-headers - update to 4.18.0-372.9.1
kernel-debug - update to 4.18.0-372.9.1
kernel-debug-core - update to 4.18.0-372.9.1
kernel-debug-devel - update to 4.18.0-372.9.1
kernel-debug-modules-extra - update to 4.18.0-372.9.1
kernel-abi-stablelists - update to 4.18.0-372.9.1
python3-perf - update to 4.18.0-372.9.1
perf - update to 4.18.0-372.9.1
kernel-tools-libs - update to 4.18.0-372.9.1
kernel-tools - update to 4.18.0-372.9.1
kernel-modules-extra - update to 4.18.0-372.9.1
kernel-modules - update to 4.18.0-372.9.1
kernel-headers - update to 4.18.0-372.9.1
kernel-devel - update to 4.18.0-372.9.1
kernel-debug-modules - update to 4.18.0-372.9.1
kernel-rt - update to 5.14.21-150500.13.64.1
kernel-rt_debug - update to 5.14.21-150500.13.64.1
kernel-rt-vdso - update to 5.14.21-150500.13.64.1
kernel-rt-extra-debuginfo - update to 5.14.21-150500.13.64.1
kselftests-kmp-rt - update to 5.14.21-150500.13.64.1
kernel-devel-rt - update to 5.14.21-150500.13.64.1
kernel-rt-extra - update to 5.14.21-150500.13.64.1
kernel-rt-devel-debuginfo - update to 5.14.21-150500.13.64.1
gfs2-kmp-rt-debuginfo - update to 5.14.21-150500.13.64.1
kernel-rt_debug-vdso-debuginfo - update to 5.14.21-150500.13.64.1
reiserfs-kmp-rt-debuginfo - update to 5.14.21-150500.13.64.1
kernel-rt_debug-vdso - update to 5.14.21-150500.13.64.1
kernel-rt_debug-livepatch-devel - update to 5.14.21-150500.13.64.1
cluster-md-kmp-rt - update to 5.14.21-150500.13.64.1
kernel-rt_debug-debugsource - update to 5.14.21-150500.13.64.1
kernel-rt_debug-devel-debuginfo - update to 5.14.21-150500.13.64.1
kselftests-kmp-rt-debuginfo - update to 5.14.21-150500.13.64.1
kernel-rt-debuginfo - update to 5.14.21-150500.13.64.1
kernel-rt-devel - update to 5.14.21-150500.13.64.1
kernel-rt-vdso-debuginfo - update to 5.14.21-150500.13.64.1
reiserfs-kmp-rt - update to 5.14.21-150500.13.64.1
kernel-rt-optional-debuginfo - update to 5.14.21-150500.13.64.1
kernel-rt_debug-debuginfo - update to 5.14.21-150500.13.64.1
gfs2-kmp-rt - update to 5.14.21-150500.13.64.1
ocfs2-kmp-rt - update to 5.14.21-150500.13.64.1
kernel-rt_debug-devel - update to 5.14.21-150500.13.64.1
cluster-md-kmp-rt-debuginfo - update to 5.14.21-150500.13.64.1
ocfs2-kmp-rt-debuginfo - update to 5.14.21-150500.13.64.1
kernel-rt-livepatch - update to 5.14.21-150500.13.64.1
kernel-source-rt - update to 5.14.21-150500.13.64.1
kernel-syms-rt - update to 5.14.21-150500.13.64.1
kernel-rt-livepatch-devel - update to 5.14.21-150500.13.64.1
dlm-kmp-rt-debuginfo - update to 5.14.21-150500.13.64.1
kernel-rt-debugsource - update to 5.14.21-150500.13.64.1
kernel-rt-optional - update to 5.14.21-150500.13.64.1
dlm-kmp-rt - update to 5.14.21-150500.13.64.1
kernel-azure-debugsource - update to 5.14.21-150500.33.63.1
kselftests-kmp-azure-debuginfo - update to 5.14.21-150500.33.63.1
kernel-azure-debuginfo - update to 5.14.21-150500.33.63.1
kernel-azure-extra - update to 5.14.21-150500.33.63.1
kernel-azure-optional - update to 5.14.21-150500.33.63.1
kselftests-kmp-azure - update to 5.14.21-150500.33.63.1
kernel-azure-devel-debuginfo - update to 5.14.21-150500.33.63.1
dlm-kmp-azure-debuginfo - update to 5.14.21-150500.33.63.1
cluster-md-kmp-azure-debuginfo - update to 5.14.21-150500.33.63.1
kernel-azure-extra-debuginfo - update to 5.14.21-150500.33.63.1
dlm-kmp-azure - update to 5.14.21-150500.33.63.1
reiserfs-kmp-azure - update to 5.14.21-150500.33.63.1
reiserfs-kmp-azure-debuginfo - update to 5.14.21-150500.33.63.1
kernel-azure-devel - update to 5.14.21-150500.33.63.1
ocfs2-kmp-azure - update to 5.14.21-150500.33.63.1
kernel-azure-optional-debuginfo - update to 5.14.21-150500.33.63.1
gfs2-kmp-azure - update to 5.14.21-150500.33.63.1
ocfs2-kmp-azure-debuginfo - update to 5.14.21-150500.33.63.1
cluster-md-kmp-azure - update to 5.14.21-150500.33.63.1
gfs2-kmp-azure-debuginfo - update to 5.14.21-150500.33.63.1
kernel-syms-azure - update to 5.14.21-150500.33.63.1
kernel-devel-azure - update to 5.14.21-150500.33.63.1
kernel-source-azure - update to 5.14.21-150500.33.63.1
kernel-azure-vdso - update to 5.14.21-150500.33.63.1
kernel-azure-vdso-debuginfo - update to 5.14.21-150500.33.63.1
kernel-azure - update to 5.14.21-150500.33.63.1
kernel-azure-livepatch-devel - update to 5.14.21-150500.33.63.1
kernel-64kb-devel-debuginfo - update to 5.14.21-150500.55.73.1
kernel-debug-vdso - update to 5.14.21-150500.55.73.1
gfs2-kmp-64kb-debuginfo - update to 5.14.21-150500.55.73.1
dtb-marvell - update to 5.14.21-150500.55.73.1
dtb-hisilicon - update to 5.14.21-150500.55.73.1
dtb-sprd - update to 5.14.21-150500.55.73.1
dtb-amazon - update to 5.14.21-150500.55.73.1
kselftests-kmp-64kb-debuginfo - update to 5.14.21-150500.55.73.1
kernel-64kb-optional - update to 5.14.21-150500.55.73.1
dtb-qcom - update to 5.14.21-150500.55.73.1
dtb-broadcom - update to 5.14.21-150500.55.73.1
dtb-altera - update to 5.14.21-150500.55.73.1
dtb-mediatek - update to 5.14.21-150500.55.73.1
dtb-arm - update to 5.14.21-150500.55.73.1
dtb-amlogic - update to 5.14.21-150500.55.73.1
dtb-apm - update to 5.14.21-150500.55.73.1
dtb-amd - update to 5.14.21-150500.55.73.1
kernel-source-vanilla - update to 5.14.21-150500.55.73.1
dtb-apple - update to 5.14.21-150500.55.73.1
kernel-kvmsmall-vdso-debuginfo - update to 5.14.21-150500.55.73.1
kernel-debug-devel-debuginfo - update to 5.14.21-150500.55.73.1
kernel-debug-devel - update to 5.14.21-150500.55.73.1
kernel-debug-debugsource - update to 5.14.21-150500.55.73.1
kernel-debug-debuginfo - update to 5.14.21-150500.55.73.1
kernel-debug-livepatch-devel - update to 5.14.21-150500.55.73.1
kernel-debug - update to 5.14.21-150500.55.73.1
dlm-kmp-64kb-debuginfo - update to 5.14.21-150500.55.73.1
kernel-devel - update to 5.14.21-150500.55.73.1
kernel-macros - update to 5.14.21-150500.55.73.1
kernel-source - update to 5.14.21-150500.55.73.1
kernel-64kb - update to 5.14.21-150500.55.73.1
ocfs2-kmp-64kb-debuginfo - update to 5.14.21-150500.55.73.1
dtb-freescale - update to 5.14.21-150500.55.73.1
dtb-exynos - update to 5.14.21-150500.55.73.1
dlm-kmp-default - update to 5.14.21-150500.55.73.1
kernel-obs-build-debugsource - update to 5.14.21-150500.55.73.1
dtb-cavium - update to 5.14.21-150500.55.73.1
kernel-obs-build - update to 5.14.21-150500.55.73.1
reiserfs-kmp-default - update to 5.14.21-150500.55.73.1
kernel-default-extra-debuginfo - update to 5.14.21-150500.55.73.1
reiserfs-kmp-default-debuginfo - update to 5.14.21-150500.55.73.1
kernel-default-extra - update to 5.14.21-150500.55.73.1
cluster-md-kmp-default - update to 5.14.21-150500.55.73.1
kernel-default-devel - update to 5.14.21-150500.55.73.1
ocfs2-kmp-default-debuginfo - update to 5.14.21-150500.55.73.1
kernel-default-debugsource - update to 5.14.21-150500.55.73.1
dlm-kmp-default-debuginfo - update to 5.14.21-150500.55.73.1
cluster-md-kmp-default-debuginfo - update to 5.14.21-150500.55.73.1
kernel-default-optional-debuginfo - update to 5.14.21-150500.55.73.1
kernel-obs-qa - update to 5.14.21-150500.55.73.1
kernel-default-livepatch - update to 5.14.21-150500.55.73.1
gfs2-kmp-default-debuginfo - update to 5.14.21-150500.55.73.1
kernel-default-optional - update to 5.14.21-150500.55.73.1
kernel-default-devel-debuginfo - update to 5.14.21-150500.55.73.1
kselftests-kmp-default-debuginfo - update to 5.14.21-150500.55.73.1
kernel-syms - update to 5.14.21-150500.55.73.1
kernel-default-livepatch-devel - update to 5.14.21-150500.55.73.1
gfs2-kmp-default - update to 5.14.21-150500.55.73.1
ocfs2-kmp-default - update to 5.14.21-150500.55.73.1
kselftests-kmp-default - update to 5.14.21-150500.55.73.1
kernel-kvmsmall-devel-debuginfo - update to 5.14.21-150500.55.73.1
kernel-kvmsmall-debuginfo - update to 5.14.21-150500.55.73.1
kernel-kvmsmall-livepatch-devel - update to 5.14.21-150500.55.73.1
kernel-kvmsmall-devel - update to 5.14.21-150500.55.73.1
kernel-kvmsmall-debugsource - update to 5.14.21-150500.55.73.1
kernel-debug-vdso-debuginfo - update to 5.14.21-150500.55.73.1
kernel-64kb-debugsource - update to 5.14.21-150500.55.73.1
dtb-socionext - update to 5.14.21-150500.55.73.1
dtb-nvidia - update to 5.14.21-150500.55.73.1
cluster-md-kmp-64kb-debuginfo - update to 5.14.21-150500.55.73.1
reiserfs-kmp-64kb - update to 5.14.21-150500.55.73.1
ocfs2-kmp-64kb - update to 5.14.21-150500.55.73.1
dtb-rockchip - update to 5.14.21-150500.55.73.1
dtb-renesas - update to 5.14.21-150500.55.73.1
dlm-kmp-64kb - update to 5.14.21-150500.55.73.1
reiserfs-kmp-64kb-debuginfo - update to 5.14.21-150500.55.73.1
kernel-64kb-debuginfo - update to 5.14.21-150500.55.73.1
kselftests-kmp-64kb - update to 5.14.21-150500.55.73.1
kernel-64kb-devel - update to 5.14.21-150500.55.73.1
kernel-64kb-livepatch-devel - update to 5.14.21-150500.55.73.1
kernel-default-debuginfo - update to 5.14.21-150500.55.73.1
kernel-64kb-extra-debuginfo - update to 5.14.21-150500.55.73.1
dtb-allwinner - update to 5.14.21-150500.55.73.1
kernel-default - update to 5.14.21-150500.55.73.1
kernel-kvmsmall - update to 5.14.21-150500.55.73.1
kernel-default-vdso-debuginfo - update to 5.14.21-150500.55.73.1
kernel-default-vdso - update to 5.14.21-150500.55.73.1
kernel-kvmsmall-vdso - update to 5.14.21-150500.55.73.1
kernel-zfcpdump - update to 5.14.21-150500.55.73.1
kernel-zfcpdump-debugsource - update to 5.14.21-150500.55.73.1
kernel-zfcpdump-debuginfo - update to 5.14.21-150500.55.73.1
dtb-aarch64 - update to 5.14.21-150500.55.73.1
dtb-xilinx - update to 5.14.21-150500.55.73.1
dtb-lg - update to 5.14.21-150500.55.73.1
cluster-md-kmp-64kb - update to 5.14.21-150500.55.73.1
gfs2-kmp-64kb - update to 5.14.21-150500.55.73.1
kernel-64kb-optional-debuginfo - update to 5.14.21-150500.55.73.1
kernel-64kb-extra - update to 5.14.21-150500.55.73.1
kernel-default-base-rebuild - update to 5.14.21-150500.55.73.1.150500.6.33.8
kernel-default-base - update to 5.14.21-150500.55.73.1.150500.6.33.8
kernel-docs-html - update to 5.14.21-150500.55.73.2
kernel-docs - update to 5.14.21-150500.55.73.2

• https://git.kernel.org/stable/c/23311b92755ffa9087332d1bb8c71c0f6a10cc08
• https://git.kernel.org/stable/c/3d79e3756ca90f7a6087b77b62c1d9c0801e0820
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.11
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16

• Improper locking in Linux kernel mptcp
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• Anolis OS update for kernel