Memory leak in Linux kernel - CVE-2021-47234

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Main Vulnerability Database Vulnerabilities #VU91633

Memory leak in Linux kernel - CVE-2021-47234

Published: June 10, 2024 / Updated: May 13, 2025


Vulnerability identifier: #VU91633
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-2021-47234
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 within the mtk_phy_init() function in drivers/phy/mediatek/phy-mtk-tphy.c. A local user can perform a denial of service (DoS) attack.


Affected software

Linux kernel
openEuler
kernel
python3-perf
bpftool
python2-perf-debuginfo
kernel-tools
kernel-devel
perf
kernel-tools-devel
perf-debuginfo
python3-perf-debuginfo
kernel-tools-debuginfo
kernel-debugsource
python2-perf
kernel-source
kernel-debuginfo
bpftool-debuginfo

How to mitigate CVE-2021-47234

Install update from vendor's website.

Linux kernel - addressed in versions 5.10.46, 5.12.13, 5.13
kernel - update to 4.19.90-2406.3.0.0282
python3-perf - update to 4.19.90-2406.3.0.0282
bpftool - update to 4.19.90-2406.3.0.0282
python2-perf-debuginfo - update to 4.19.90-2406.3.0.0282
kernel-tools - update to 4.19.90-2406.3.0.0282
kernel-devel - update to 4.19.90-2406.3.0.0282
perf - update to 4.19.90-2406.3.0.0282
kernel-tools-devel - update to 4.19.90-2406.3.0.0282
perf-debuginfo - update to 4.19.90-2406.3.0.0282
python3-perf-debuginfo - update to 4.19.90-2406.3.0.0282
kernel-tools-debuginfo - update to 4.19.90-2406.3.0.0282
kernel-debugsource - update to 4.19.90-2406.3.0.0282
python2-perf - update to 4.19.90-2406.3.0.0282
kernel-source - update to 4.19.90-2406.3.0.0282
kernel-debuginfo - update to 4.19.90-2406.3.0.0282
bpftool-debuginfo - update to 4.19.90-2406.3.0.0282

External References

Related Security Bulletins