Memory leak in Linux kernel - CVE-2021-47287

Vulnerability identifier: #VU89953

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-2021-47287

CWE-ID: CWE-401

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 memory leak within the EXPORT_SYMBOL_GPL() and __auxiliary_driver_register() functions in drivers/base/auxiliary.c. A local user can perform a denial of service (DoS) attack.

Linux kernel
Oracle Linux
Red Hat Enterprise Linux for Real Time
Red Hat Enterprise Linux for Real Time for NFV
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat CodeReady Linux Builder for x86_64
Red Hat CodeReady Linux Builder for Power, little endian
Red Hat CodeReady Linux Builder for ARM 64
Anolis OS
Red Hat OpenShift Container Platform
kernel (Red Hat package)
kernel-rt (Red Hat package)
kernel-doc
kernel-abi-stablelists
python3-perf
perf
kernel-tools-libs-devel
kernel-tools-libs
kernel-tools
kernel-modules-extra
kernel-modules
kernel-headers
kernel-devel
kernel-debug-modules-extra
kernel-debug-modules
kernel-debug-devel
kernel-debug-core
kernel-debug
kernel-cross-headers
kernel-core
kernel
bpftool
OpenShift Logging

Install update from vendor's website.

Linux kernel - addressed in versions 5.13.6, 5.14
Red Hat OpenShift Container Platform - addressed in versions 4.13.52, 4.14.38, 4.15.35
kernel (Red Hat package) - update to 4.18.0-553.22.1.el8_10
kernel-rt (Red Hat package) - update to 4.18.0-553.22.1.rt7.363.el8_10
kernel-doc - update to 4.18.0-553.22.1.0.1
kernel-abi-stablelists - update to 4.18.0-553.22.1.0.1
python3-perf - update to 4.18.0-553.22.1.0.1
perf - update to 4.18.0-553.22.1.0.1
kernel-tools-libs-devel - update to 4.18.0-553.22.1.0.1
kernel-tools-libs - update to 4.18.0-553.22.1.0.1
kernel-tools - update to 4.18.0-553.22.1.0.1
kernel-modules-extra - update to 4.18.0-553.22.1.0.1
kernel-modules - update to 4.18.0-553.22.1.0.1
kernel-headers - update to 4.18.0-553.22.1.0.1
kernel-devel - update to 4.18.0-553.22.1.0.1
kernel-debug-modules-extra - update to 4.18.0-553.22.1.0.1
kernel-debug-modules - update to 4.18.0-553.22.1.0.1
kernel-debug-devel - update to 4.18.0-553.22.1.0.1
kernel-debug-core - update to 4.18.0-553.22.1.0.1
kernel-debug - update to 4.18.0-553.22.1.0.1
kernel-cross-headers - update to 4.18.0-553.22.1.0.1
kernel-core - update to 4.18.0-553.22.1.0.1
kernel - update to 4.18.0-553.22.1.0.1
bpftool - update to 4.18.0-553.22.1.0.1
OpenShift Logging - update to 5.6.25

• https://git.kernel.org/stable/c/ce5b3de58fc21303722df46551f7eb9a91afb409
• https://git.kernel.org/stable/c/4afa0c22eed33cfe0c590742387f0d16f32412f3
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.6
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14

• Memory leak in Linux kernel base
• Red Hat Enterprise Linux 8 update for kernel-rt
• Multiple vulnerabilities in Red Hat OpenShift Container Platform 4.15
• Multiple vulnerabilities in Red Hat OpenShift Container Platform 4.14
• Red Hat Enterprise Linux 8 update for kernel
• Multiple vulnerabilities in Oracle Linux
• Multiple vulnerabilities in Red Hat OpenShift Container Platform 4.13
• Multiple vulnerabilities in OpenShift Logging 5.6
• Anolis OS update for kernel