Resource management error in Linux kernel - CVE-2021-47579

CSH
CYBERSECURITY HELP
Sign In REGISTER
 
Main Vulnerability Database Vulnerabilities #VU93835

Resource management error in Linux kernel - CVE-2021-47579

Published: July 7, 2024 / Updated: May 13, 2025


Vulnerability identifier: #VU93835
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-2021-47579
CWE-ID: CWE-399
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to resource management error within the ovl_create_real() function in fs/overlayfs/super.c, within the ovl_mkdir_real() function in fs/overlayfs/dir.c. A local user can perform a denial of service (DoS) attack.


Affected software

Linux kernel
Anolis OS
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for Real Time for NFV
Red Hat Enterprise Linux for Real Time
Red Hat CodeReady Linux Builder for ARM 64
Red Hat CodeReady Linux Builder for Power, little endian
Red Hat CodeReady Linux Builder for x86_64
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for IBM z Systems
Technical Support Appliance
Robotic Process Automation for Cloud Pak
Juniper Secure Analytics (JSA)
Red Hat OpenShift Container Platform
kernel (Red Hat package)
kernel-rt (Red Hat package)
kernel-devel
kernel-debug-devel
kernel-headers
kernel-modules
kernel-modules-extra
kernel-tools
kernel-tools-libs
kernel-tools-libs-devel
perf
python3-perf
kernel-abi-stablelists
kernel-doc
kernel-debug-modules-extra
kernel-debug-modules
kernel-debug-core
kernel-debug
kernel-cross-headers
kernel-core
kernel
bpftool
Session Smart Router
IBM Qradar SIEM

How to mitigate CVE-2021-47579

Install update from vendor's website.

Linux kernel - addressed in versions 4.19.222, 5.4.168, 5.10.88, 5.15.11, 5.16
Technical Support Appliance - update to 3.0.1
Juniper Secure Analytics (JSA) - update to 7.5.0 UP10 IF02
Red Hat OpenShift Container Platform - addressed in versions 4.13.48, 4.15.28
kernel (Red Hat package) - update to 4.18.0-553.16.1.el8_10
kernel-rt (Red Hat package) - update to 4.18.0-553.16.1.rt7.357.el8_10
kernel-devel - update to 4.18.0-553.16.1.0.1
kernel-debug-devel - update to 4.18.0-553.16.1.0.1
kernel-headers - update to 4.18.0-553.16.1.0.1
kernel-modules - update to 4.18.0-553.16.1.0.1
kernel-modules-extra - update to 4.18.0-553.16.1.0.1
kernel-tools - update to 4.18.0-553.16.1.0.1
kernel-tools-libs - update to 4.18.0-553.16.1.0.1
kernel-tools-libs-devel - update to 4.18.0-553.16.1.0.1
perf - update to 4.18.0-553.16.1.0.1
python3-perf - update to 4.18.0-553.16.1.0.1
kernel-abi-stablelists - update to 4.18.0-553.16.1.0.1
kernel-doc - update to 4.18.0-553.16.1.0.1
kernel-debug-modules-extra - update to 4.18.0-553.16.1.0.1
kernel-debug-modules - update to 4.18.0-553.16.1.0.1
kernel-debug-core - update to 4.18.0-553.16.1.0.1
kernel-debug - update to 4.18.0-553.16.1.0.1
kernel-cross-headers - update to 4.18.0-553.16.1.0.1
kernel-core - update to 4.18.0-553.16.1.0.1
kernel - update to 4.18.0-553.16.1.0.1
bpftool - update to 4.18.0-553.16.1.0.1
Session Smart Router - addressed in versions 6.2.10, 6.3.7
IBM Qradar SIEM - update to 7.5.0 Update Pack 10 IF01
Robotic Process Automation for Cloud Pak - addressed in versions 21.0.7.18, 23.0.19

External References

Related Security Bulletins