Improper locking in Linux kernel - CVE-2021-47146

Vulnerability identifier: #VU92048

CSH Severity: Low

CVSS v4 BT: 4.3 [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/E:U/U:Clear]

CVE-ID: CVE-2021-47146

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 mld_newpack() function in net/ipv6/mcast.c. A local user can perform a denial of service (DoS) attack.

Linux kernel
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Software Development Kit 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise High Availability Extension 12
SUSE Linux Enterprise Real Time 12
SUSE Linux Enterprise Live Patching
SUSE Linux Enterprise Workstation Extension 12
Ubuntu
openEuler
Dell Data Protection Central
PowerProtect DP Series Appliance (IDPA)
kgraft-patch-4_12_14-122_212-default
linux (Ubuntu package)
linux-fips (Ubuntu package)
gfs2-kmp-rt-debuginfo
kernel-rt-base
kernel-rt-devel-debuginfo
kernel-syms-rt
kernel-rt_debug-debugsource
ocfs2-kmp-rt
dlm-kmp-rt
kernel-rt_debug-debuginfo
cluster-md-kmp-rt-debuginfo
kernel-rt-devel
gfs2-kmp-rt
cluster-md-kmp-rt
kernel-rt-debugsource
kernel-rt-debuginfo
kernel-rt-base-debuginfo
dlm-kmp-rt-debuginfo
ocfs2-kmp-rt-debuginfo
kernel-rt_debug-devel-debuginfo
kernel-rt_debug-devel
kernel-devel-rt
kernel-source-rt
kernel-rt_debug
kernel-rt
kernel-azure-base
kernel-azure-devel
kernel-azure
kernel-azure-base-debuginfo
kernel-syms-azure
kernel-azure-debuginfo
kernel-azure-debugsource
kernel-source-azure
kernel-devel-azure
kernel-default-devel
dlm-kmp-default-debuginfo
dlm-kmp-default
ocfs2-kmp-default-debuginfo
kernel-default-debugsource
gfs2-kmp-default-debuginfo
gfs2-kmp-default
kernel-default-base-debuginfo
kernel-default-debuginfo
kernel-default-extra-debuginfo
kernel-default-extra
kernel-default-man
kernel-obs-build-debugsource
kernel-obs-build
kernel-docs
kernel-default-kgraft
kernel-default-kgraft-devel
kernel-devel
kernel-default-base
kernel-syms
ocfs2-kmp-default
cluster-md-kmp-default-debuginfo
cluster-md-kmp-default
kernel-default
kernel-source
kernel-macros
kernel-default-devel-debuginfo
python3-perf
python2-perf-debuginfo
kernel-debugsource
python2-perf
perf
kernel-tools-devel
perf-debuginfo
python3-perf-debuginfo
kernel-tools
bpftool-debuginfo
kernel-tools-debuginfo
bpftool
kernel-debuginfo
kernel

Install update from vendor's website.

Linux kernel - addressed in versions 4.4.271, 4.9.271, 4.14.235, 4.19.193, 5.4.124, 5.10.42, 5.12.9, 5.13
kgraft-patch-4_12_14-122_212-default - update to 1-8.11.1
linux (Ubuntu package) - addressed in versions 4.4.0.276.282, 4.4.0-276.310, 4.4.0.276.310~14.04.1, 4.4.0-276.310~14.04.1, 4.4.0.1150.147, 4.4.0-1150.156, 4.4.0.1151.148, 4.4.0-1151.162, 4.4.0.1188.192, 4.4.0-1188.203
linux-fips (Ubuntu package) - addressed in versions 4.4.0.1120.121, 4.4.0-1120.127
gfs2-kmp-rt-debuginfo - update to 4.12.14-10.182.1
kernel-rt-base - update to 4.12.14-10.182.1
kernel-rt-devel-debuginfo - update to 4.12.14-10.182.1
kernel-syms-rt - update to 4.12.14-10.182.1
kernel-rt_debug-debugsource - update to 4.12.14-10.182.1
ocfs2-kmp-rt - update to 4.12.14-10.182.1
dlm-kmp-rt - update to 4.12.14-10.182.1
kernel-rt_debug-debuginfo - update to 4.12.14-10.182.1
cluster-md-kmp-rt-debuginfo - update to 4.12.14-10.182.1
kernel-rt-devel - update to 4.12.14-10.182.1
gfs2-kmp-rt - update to 4.12.14-10.182.1
cluster-md-kmp-rt - update to 4.12.14-10.182.1
kernel-rt-debugsource - update to 4.12.14-10.182.1
kernel-rt-debuginfo - update to 4.12.14-10.182.1
kernel-rt-base-debuginfo - update to 4.12.14-10.182.1
dlm-kmp-rt-debuginfo - update to 4.12.14-10.182.1
ocfs2-kmp-rt-debuginfo - update to 4.12.14-10.182.1
kernel-rt_debug-devel-debuginfo - update to 4.12.14-10.182.1
kernel-rt_debug-devel - update to 4.12.14-10.182.1
kernel-devel-rt - update to 4.12.14-10.182.1
kernel-source-rt - update to 4.12.14-10.182.1
kernel-rt_debug - update to 4.12.14-10.182.1
kernel-rt - update to 4.12.14-10.182.1
kernel-azure-base - update to 4.12.14-16.182.1
kernel-azure-devel - update to 4.12.14-16.182.1
kernel-azure - update to 4.12.14-16.182.1
kernel-azure-base-debuginfo - update to 4.12.14-16.182.1
kernel-syms-azure - update to 4.12.14-16.182.1
kernel-azure-debuginfo - update to 4.12.14-16.182.1
kernel-azure-debugsource - update to 4.12.14-16.182.1
kernel-source-azure - update to 4.12.14-16.182.1
kernel-devel-azure - update to 4.12.14-16.182.1
kernel-default-devel - update to 4.12.14-122.212.1
dlm-kmp-default-debuginfo - update to 4.12.14-122.212.1
dlm-kmp-default - update to 4.12.14-122.212.1
ocfs2-kmp-default-debuginfo - update to 4.12.14-122.212.1
kernel-default-debugsource - update to 4.12.14-122.212.1
gfs2-kmp-default-debuginfo - update to 4.12.14-122.212.1
gfs2-kmp-default - update to 4.12.14-122.212.1
kernel-default-base-debuginfo - update to 4.12.14-122.212.1
kernel-default-debuginfo - update to 4.12.14-122.212.1
kernel-default-extra-debuginfo - update to 4.12.14-122.212.1
kernel-default-extra - update to 4.12.14-122.212.1
kernel-default-man - update to 4.12.14-122.212.1
kernel-obs-build-debugsource - update to 4.12.14-122.212.1
kernel-obs-build - update to 4.12.14-122.212.1
kernel-docs - update to 4.12.14-122.212.1
kernel-default-kgraft - update to 4.12.14-122.212.1
kernel-default-kgraft-devel - update to 4.12.14-122.212.1
kernel-devel - update to 4.12.14-122.212.1
kernel-default-base - update to 4.12.14-122.212.1
kernel-syms - update to 4.12.14-122.212.1
ocfs2-kmp-default - update to 4.12.14-122.212.1
cluster-md-kmp-default-debuginfo - update to 4.12.14-122.212.1
cluster-md-kmp-default - update to 4.12.14-122.212.1
kernel-default - update to 4.12.14-122.212.1
kernel-source - update to 4.12.14-122.212.1
kernel-macros - update to 4.12.14-122.212.1
kernel-default-devel-debuginfo - update to 4.12.14-122.212.1
python3-perf - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
kernel-source - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
python2-perf-debuginfo - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
kernel-debugsource - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
python2-perf - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
perf - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
kernel-tools-devel - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
perf-debuginfo - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
python3-perf-debuginfo - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
kernel-tools - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
bpftool-debuginfo - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
kernel-tools-debuginfo - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
bpftool - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
kernel-debuginfo - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
kernel-devel - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273
kernel - addressed in versions 4.19.90-2404.2.0.0246, 4.19.90-2404.2.0.0273

• https://git.kernel.org/stable/c/0e35b7457b7b6e73ffeaaca1a577fdf1af0feca1
• https://git.kernel.org/stable/c/17728616a4c85baf0edc975c60ba4e4157684d9a
• https://git.kernel.org/stable/c/221142038f36d9f28b64e83e954774da4d4ccd17
• https://git.kernel.org/stable/c/4b77ad9097067b31237eeeee0bf70f80849680a0
• https://git.kernel.org/stable/c/37d697759958d111439080bab7e14d2b0e7b39f5
• https://git.kernel.org/stable/c/beb39adb150f8f3b516ddf7c39835a9788704d23
• https://git.kernel.org/stable/c/a76fb9ba545289379acf409653ad5f74417be59c
• https://git.kernel.org/stable/c/020ef930b826d21c5446fdc9db80fd72a791bc21
• https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.235
• https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.193
• https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.271
• https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.271
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.42
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.9
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.124

• Improper locking in Linux kernel ipv6
• openEuler 20.03 LTS SP1 update for kernel
• openEuler 20.03 LTS SP4 update for kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• Multiple vulnerabilities in Dell Data Protection Central
• Ubuntu update for linux-fips
• Ubuntu update for linux