Memory leak in Linux kernel - CVE-2021-46924

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Main Vulnerability Database Vulnerabilities #VU88212

Memory leak in Linux kernel - CVE-2021-46924

Published: April 8, 2024 / Updated: May 14, 2025


Vulnerability identifier: #VU88212
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-2021-46924
CWE-ID: CWE-401
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 memory leak in drivers/nfc/st21nfca/i2c.c. A local user can perform a denial of service attack.


Affected software

Linux kernel
Ubuntu
openEuler
Dell Data Protection Central
PowerProtect DP Series Appliance (IDPA)
Storage Resource Manager
EMC Cloud Tiering Appliance
linux (Ubuntu package)
linux-lts-xenial (Ubuntu package)
linux-aws (Ubuntu package)
linux-kvm (Ubuntu package)
bpftool
kernel
kernel-devel
perf-debuginfo
perf
python2-perf
kernel-source
python3-perf-debuginfo
python3-perf
kernel-tools-debuginfo
kernel-tools
kernel-tools-devel
python2-perf-debuginfo
kernel-debugsource
kernel-debuginfo
bpftool-debuginfo
Dell EMC Storage Monitoring and Reporting (SMR)
Dell Secure Connect Gateway

How to mitigate CVE-2021-46924

Install update from vendor's website.

Linux kernel - addressed in versions 4.14.261, 4.19.224, 5.4.170, 5.10.90, 5.15.13, 5.16
linux (Ubuntu package) - update to 4.4.0-258.292
linux-lts-xenial (Ubuntu package) - update to 4.4.0-258.292~14.04.2
linux-aws (Ubuntu package) - addressed in versions 4.4.0-1135.141, 4.4.0-1173.188
linux-kvm (Ubuntu package) - update to 4.4.0-1136.146
bpftool - addressed in versions 4.19.90-2404.1.0.0245, 4.19.90-2404.1.0.0272
kernel - addressed in versions 4.19.90-2404.1.0.0245, 4.19.90-2404.1.0.0272
kernel-devel - addressed in versions 4.19.90-2404.1.0.0245, 4.19.90-2404.1.0.0272
perf-debuginfo - addressed in versions 4.19.90-2404.1.0.0245, 4.19.90-2404.1.0.0272
perf - addressed in versions 4.19.90-2404.1.0.0245, 4.19.90-2404.1.0.0272
python2-perf - addressed in versions 4.19.90-2404.1.0.0245, 4.19.90-2404.1.0.0272
kernel-source - addressed in versions 4.19.90-2404.1.0.0245, 4.19.90-2404.1.0.0272
python3-perf-debuginfo - addressed in versions 4.19.90-2404.1.0.0245, 4.19.90-2404.1.0.0272
python3-perf - addressed in versions 4.19.90-2404.1.0.0245, 4.19.90-2404.1.0.0272
kernel-tools-debuginfo - addressed in versions 4.19.90-2404.1.0.0245, 4.19.90-2404.1.0.0272
kernel-tools - addressed in versions 4.19.90-2404.1.0.0245, 4.19.90-2404.1.0.0272
kernel-tools-devel - addressed in versions 4.19.90-2404.1.0.0245, 4.19.90-2404.1.0.0272
python2-perf-debuginfo - addressed in versions 4.19.90-2404.1.0.0245, 4.19.90-2404.1.0.0272
kernel-debugsource - addressed in versions 4.19.90-2404.1.0.0245, 4.19.90-2404.1.0.0272
kernel-debuginfo - addressed in versions 4.19.90-2404.1.0.0245, 4.19.90-2404.1.0.0272
bpftool-debuginfo - addressed in versions 4.19.90-2404.1.0.0245, 4.19.90-2404.1.0.0272
Dell EMC Storage Monitoring and Reporting (SMR) - update to 5.0.1.0
Storage Resource Manager - 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

External References

Related Security Bulletins