Buffer overflow in Linux kernel net



| Updated: 2025-05-13
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-47544
CWE-ID CWE-119
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) Buffer overflow

EUVDB-ID: #VU93138

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-2021-47544

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists due to memory corruption within the include/net/sock.h. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.10 - 5.16 rc8

CPE2.3 External links

https://git.kernel.org/stable/c/c6f340a331fb72e5ac23a083de9c780e132ca3ae
https://git.kernel.org/stable/c/5a9afcd827cafe14a95c9fcbded2c2d104f18dfc
https://git.kernel.org/stable/c/dacb5d8875cc6cd3a553363b4d6f06760fcbe70c
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.84
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.7
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16


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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