Resource exhaustion in Linux kernel - CVE-2021-47076

Vulnerability identifier: #VU92193

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-2021-47076

CWE-ID: CWE-400

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 application does not properly control consumption of internal resources. A local user can trigger resource exhaustion and perform a denial of service (DoS) attack.

Linux kernel
Anolis OS
Ubuntu
Dell Data Protection Central
PowerProtect DP Series Appliance (IDPA)
Storage Resource Manager
EMC Cloud Tiering Appliance
linux-image-raspi-hwe-18.04 (Ubuntu package)
linux-image-lowlatency-hwe-18.04 (Ubuntu package)
linux-image-snapdragon-hwe-18.04 (Ubuntu package)
linux-image-virtual-hwe-18.04 (Ubuntu package)
linux-image-4.15.0-1184-azure (Ubuntu package)
linux-image-5.4.0-1136-aws (Ubuntu package)
linux-image-virtual-hwe-16.04 (Ubuntu package)
linux-image-aws (Ubuntu package)
linux-image-oracle (Ubuntu package)
linux-image-oem (Ubuntu package)
linux-image-5.4.0-1135-oracle (Ubuntu package)
linux-image-lowlatency-hwe-16.04 (Ubuntu package)
linux-image-gke (Ubuntu package)
linux-image-generic-hwe-16.04 (Ubuntu package)
linux-image-5.4.0-1120-raspi (Ubuntu package)
linux-image-ibm (Ubuntu package)
linux-image-4.15.0-1138-oracle (Ubuntu package)
linux-image-4.15.0-1159-kvm (Ubuntu package)
linux-image-4.15.0-1169-gcp (Ubuntu package)
linux-image-4.15.0-1176-aws (Ubuntu package)
linux-image-4.15.0-232-generic (Ubuntu package)
linux-image-4.15.0-232-lowlatency (Ubuntu package)
linux-image-aws-lts-18.04 (Ubuntu package)
linux-image-gcp-lts-18.04 (Ubuntu package)
linux-image-generic (Ubuntu package)
linux-image-kvm (Ubuntu package)
linux-image-lowlatency (Ubuntu package)
linux-image-oracle-lts-18.04 (Ubuntu package)
linux-image-virtual (Ubuntu package)
linux-image-aws-hwe (Ubuntu package)
linux-image-gcp (Ubuntu package)
linux-image-generic-hwe-18.04 (Ubuntu package)
linux-image-5.4.0-1140-gcp (Ubuntu package)
linux-image-5.4.0-202-generic (Ubuntu package)
linux-image-5.4.0-202-lowlatency (Ubuntu package)
linux-image-5.4.0-1083-ibm (Ubuntu package)
linux-image-azure (Ubuntu package)
linux-image-oem-osp1 (Ubuntu package)
linux-image-5.4.0-1142-azure (Ubuntu package)
linux-image-azure-lts-18.04 (Ubuntu package)
kernel-doc
python3-perf
perf
kernel-tools-libs
kernel-tools
kernel-modules-extra
kernel-modules
kernel-headers
kernel-abi-stablelists
kernel-devel
kernel-debug-modules-extra
kernel-debug-modules
kernel-debug-devel
kernel-debug-core
kernel-debug
kernel-cross-headers
kernel-core
kernel
bpftool
linux-image-generic-lpae (Ubuntu package)
linux-image-5.4.0-202-generic-lpae (Ubuntu package)
linux-image-5.4.0-1045-iot (Ubuntu package)
linux-image-xilinx-zynqmp (Ubuntu package)
linux-image-5.4.0-1055-xilinx-zynqmp (Ubuntu package)
linux-image-ibm-lts-20.04 (Ubuntu package)
linux-image-bluefield (Ubuntu package)
linux-image-5.4.0-1096-bluefield (Ubuntu package)
linux-image-raspi (Ubuntu package)
linux-image-raspi2 (Ubuntu package)
linux-image-5.4.0-1124-kvm (Ubuntu package)
linux-image-oracle-lts-20.04 (Ubuntu package)
linux-image-aws-lts-20.04 (Ubuntu package)
linux-image-gcp-lts-20.04 (Ubuntu package)
linux-image-azure-lts-20.04 (Ubuntu package)
Dell EMC Storage Monitoring and Reporting (SMR)
Dell Secure Connect Gateway

Install updates from vendor's website.

Linux kernel - addressed in versions 5.12.7, 5.13
linux-image-raspi-hwe-18.04 (Ubuntu package) - update to Ubuntu Pro
linux-image-lowlatency-hwe-18.04 (Ubuntu package) - update to Ubuntu Pro
linux-image-snapdragon-hwe-18.04 (Ubuntu package) - update to Ubuntu Pro
linux-image-virtual-hwe-18.04 (Ubuntu package) - update to Ubuntu Pro
linux-image-4.15.0-1184-azure (Ubuntu package) - addressed in versions Ubuntu Pro, linux-image-azure
linux-image-5.4.0-1136-aws (Ubuntu package) - addressed in versions Ubuntu Pro, 5.4.0-1136.146
linux-image-virtual-hwe-16.04 (Ubuntu package) - update to Ubuntu Pro (Infra-only)
linux-image-aws (Ubuntu package) - update to Ubuntu Pro (Infra-only)
linux-image-oracle (Ubuntu package) - update to Ubuntu Pro (Infra-only)
linux-image-oem (Ubuntu package) - addressed in versions Ubuntu Pro (Infra-only), 5.4.0.202.198
linux-image-5.4.0-1135-oracle (Ubuntu package) - addressed in versions Ubuntu Pro, 5.4.0-1135.144
linux-image-lowlatency-hwe-16.04 (Ubuntu package) - update to Ubuntu Pro (Infra-only)
linux-image-gke (Ubuntu package) - update to Ubuntu Pro (Infra-only)
linux-image-generic-hwe-16.04 (Ubuntu package) - update to Ubuntu Pro (Infra-only)
linux-image-5.4.0-1120-raspi (Ubuntu package) - addressed in versions Ubuntu Pro, 5.4.0-1120.132
linux-image-ibm (Ubuntu package) - update to Ubuntu Pro
linux-image-4.15.0-1138-oracle (Ubuntu package) - update to Ubuntu Pro
linux-image-4.15.0-1159-kvm (Ubuntu package) - update to Ubuntu Pro
linux-image-4.15.0-1169-gcp (Ubuntu package) - update to Ubuntu Pro
linux-image-4.15.0-1176-aws (Ubuntu package) - update to Ubuntu Pro
linux-image-4.15.0-232-generic (Ubuntu package) - update to Ubuntu Pro
linux-image-4.15.0-232-lowlatency (Ubuntu package) - update to Ubuntu Pro
linux-image-aws-lts-18.04 (Ubuntu package) - update to Ubuntu Pro
linux-image-gcp-lts-18.04 (Ubuntu package) - update to Ubuntu Pro
linux-image-generic (Ubuntu package) - addressed in versions Ubuntu Pro (Infra-only), 5.4.0.202.198
linux-image-kvm (Ubuntu package) - addressed in versions Ubuntu Pro (Infra-only), 5.4.0.1124.120
linux-image-lowlatency (Ubuntu package) - addressed in versions Ubuntu Pro (Infra-only), 5.4.0.202.198
linux-image-oracle-lts-18.04 (Ubuntu package) - update to Ubuntu Pro
linux-image-virtual (Ubuntu package) - addressed in versions Ubuntu Pro (Infra-only), 5.4.0.202.198
linux-image-aws-hwe (Ubuntu package) - update to Ubuntu Pro (Infra-only)
linux-image-gcp (Ubuntu package) - update to Ubuntu Pro (Infra-only)
linux-image-generic-hwe-18.04 (Ubuntu package) - update to Ubuntu Pro
linux-image-5.4.0-1140-gcp (Ubuntu package) - addressed in versions Ubuntu Pro, 5.4.0-1140.149
linux-image-5.4.0-202-generic (Ubuntu package) - addressed in versions Ubuntu Pro, 5.4.0-202.222
linux-image-5.4.0-202-lowlatency (Ubuntu package) - addressed in versions Ubuntu Pro, 5.4.0-202.222
linux-image-5.4.0-1083-ibm (Ubuntu package) - addressed in versions Ubuntu Pro, 5.4.0-1083.88
linux-image-azure (Ubuntu package) - update to Ubuntu Pro (Infra-only)
linux-image-oem-osp1 (Ubuntu package) - addressed in versions Ubuntu Pro, 5.4.0.202.198
linux-image-5.4.0-1142-azure (Ubuntu package) - addressed in versions Ubuntu Pro, 5.4.0-1142.149
linux-image-azure-lts-18.04 (Ubuntu package) - update to Ubuntu Pro
kernel-doc - 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-abi-stablelists - update to 4.18.0-372.9.1
kernel-devel - update to 4.18.0-372.9.1
kernel-debug-modules-extra - update to 4.18.0-372.9.1
kernel-debug-modules - update to 4.18.0-372.9.1
kernel-debug-devel - update to 4.18.0-372.9.1
kernel-debug-core - update to 4.18.0-372.9.1
kernel-debug - update to 4.18.0-372.9.1
kernel-cross-headers - update to 4.18.0-372.9.1
kernel-core - update to 4.18.0-372.9.1
kernel - update to 4.18.0-372.9.1
bpftool - update to 4.18.0-372.9.1
Storage Resource Manager - update to 5.0.1.0
Dell EMC Storage Monitoring and Reporting (SMR) - update to 5.0.1.0
linux-image-generic-lpae (Ubuntu package) - update to 5.4.0.202.198
linux-image-5.4.0-202-generic-lpae (Ubuntu package) - update to 5.4.0-202.222
linux-image-5.4.0-1045-iot (Ubuntu package) - update to 5.4.0-1045.46
linux-image-xilinx-zynqmp (Ubuntu package) - update to 5.4.0.1055.55
linux-image-5.4.0-1055-xilinx-zynqmp (Ubuntu package) - update to 5.4.0-1055.59
linux-image-ibm-lts-20.04 (Ubuntu package) - update to 5.4.0.1083.112
linux-image-bluefield (Ubuntu package) - update to 5.4.0.1096.92
linux-image-5.4.0-1096-bluefield (Ubuntu package) - update to 5.4.0-1096.103
linux-image-raspi (Ubuntu package) - update to 5.4.0.1120.150
linux-image-raspi2 (Ubuntu package) - update to 5.4.0.1120.150
linux-image-5.4.0-1124-kvm (Ubuntu package) - update to 5.4.0-1124.132
linux-image-oracle-lts-20.04 (Ubuntu package) - update to 5.4.0.1135.128
linux-image-aws-lts-20.04 (Ubuntu package) - update to 5.4.0.1136.133
linux-image-gcp-lts-20.04 (Ubuntu package) - update to 5.4.0.1140.142
linux-image-azure-lts-20.04 (Ubuntu package) - update to 5.4.0.1142.136
Dell Secure Connect Gateway - update to 5.24.00.14
EMC Cloud Tiering Appliance - update to 13.2.0.2.29

• https://git.kernel.org/stable/c/abe31d25facdb9109fe2cf69890748295291570c
• https://git.kernel.org/stable/c/dc07628bd2bbc1da768e265192c28ebd301f509d
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.7
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13

• Multiple vulnerabilities in Dell Secure Connect Gateway
• Multiple vulnerabilities in Dell Cloud Tiering Appliance
• Multiple vulnerabilities in Dell Storage Resource Manager (SRM) and Dell Storage Monitoring and Reporting (SMR)
• Multiple vulnerabilities in Dell Data Protection Central
• Ubuntu update for linux
• Ubuntu update for linux-aws
• Ubuntu update for linux-bluefield
• Ubuntu update for linux-iot
• Ubuntu update for linux-raspi-5.4
• Ubuntu update for linux
• Ubuntu update for linux-azure
• Ubuntu update for linux-azure
• Ubuntu update for linux-azure-5.4
• Anolis OS update for kernel