Memory leak in Linux kernel sunrpc



| Updated: 2025-05-13
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-47624
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: #VU94401

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-2021-47624

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 rpc_sysfs_xprt_state_change() function in net/sunrpc/sysfs.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.15 - 5.17 rc12

CPE2.3 External links

https://git.kernel.org/stable/c/4b22aa42bd4d2d630ef1854c139275c3532937cb
https://git.kernel.org/stable/c/5f6024c05a2c0fdd180b29395aaf686d25af3a0f
https://git.kernel.org/stable/c/776d794f28c95051bc70405a7b1fa40115658a18
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.24
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16.10
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.17


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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