Incorrect calculation in Linux kernel - CVE-2021-46915

Vulnerability identifier: #VU88215

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-2021-46915

CWE-ID: CWE-682

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 incorrect calculation within the nft_limit_init() function in net/netfilter/nft_limit.c. A local user can perform a denial of service (DoS) attack.

Linux kernel
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for Real Time - Telecommunications Update Service
Dell Data Protection Central
PowerProtect DP Series Appliance (IDPA)
Storage Resource Manager
EMC Cloud Tiering Appliance
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
kernel (Red Hat package)
kernel-rt (Red Hat package)
Dell EMC Storage Monitoring and Reporting (SMR)
Dell Secure Connect Gateway

Install updates from vendor's website.

Linux kernel - addressed in versions 4.14.232, 4.19.189, 5.4.114, 5.10.32, 5.11.16, 5.12
kernel (Red Hat package) - addressed in versions 4.18.0-193.133.1.el8_2, 4.18.0-305.130.1.el8_4
kernel-rt (Red Hat package) - addressed in versions 4.18.0-193.133.1.rt13.184.el8_2, 4.18.0-305.130.1.rt7.206.el8_4
Storage Resource Manager - update to 5.0.1.0
Dell EMC Storage Monitoring and Reporting (SMR) - update to 5.0.1.0
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/9065ccb9ec92c5120e7e97958397ebdb454f23d6
• https://git.kernel.org/stable/c/fadd3c4afdf3d4c21f4d138502f8b76334987e26
• https://git.kernel.org/stable/c/01fb1626b620cb37a65ad08e0f626489e8f042ef
• https://git.kernel.org/stable/c/dc1732baa9da5b68621586bf8636ebbc27dc62d2
• https://git.kernel.org/stable/c/1bb3ee4259936cc3b2d80a4a480bbb4868575071
• https://git.kernel.org/stable/c/b895bdf5d643b6feb7c60856326dd4feb6981560
• https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.232
• https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.189
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.32
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.16
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.114

• Denial of service in Linux kernel nft_limit
• Red Hat Enterprise Linux 8 update for kernel
• Red Hat Enterprise Linux 8 update for kernel-rt
• Red Hat Enterprise Linux 8 update for kernel
• Red Hat Enterprise Linux 8 update for kernel-rt
• 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