Memory leak in Linux kernel cpufreq driver



| Updated: 2025-05-14
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-47313
CWE-ID CWE-401
Exploitation vector Local
Public exploit N/A
Vulnerable software
 Linux kernel
Operating systems & Components / Operating system

Vendor Linux Foundation

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Memory leak

EUVDB-ID: #VU90442

Risk: Low

CVSSv4.0: 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-2021-47313

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

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

The vulnerability exists due to memory leak within the cppc_verify_policy(), cppc_cpufreq_stop_cpu() and cppc_cpufreq_cpu_init() functions in drivers/cpufreq/cppc_cpufreq.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.12 - 5.14 rc7

CPE2.3 External links

https://git.kernel.org/stable/c/b775383355755885b19d2acef977f1ca132e80a3
https://git.kernel.org/stable/c/e1b2b2b61d30d7ce057ec17237c217d152ed97f2
https://git.kernel.org/stable/c/fe2535a44904a77615a3af8e8fd7dafb98fb0e1b
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.19
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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