Stack-based buffer overflow in Linux kernel powerpc kernel



| Updated: 2025-05-13
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-47567
CWE-ID CWE-121
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) Stack-based buffer overflow

EUVDB-ID: #VU91295

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-2021-47567

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: No

Description

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

The vulnerability exists due to stack overflow within the arch/powerpc/kernel/head_32.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/dfe906da9a1abebdebe8b15bb3e66a2578f6c4c7
https://git.kernel.org/stable/c/c4e3ff8b8b1d54f0c755670174c453b06e17114b
https://git.kernel.org/stable/c/5bb60ea611db1e04814426ed4bd1c95d1487678e
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.83
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.6
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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