Stack-based buffer overflow in Linux kernel powerpc kvm



| Updated: 2025-05-13
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-47465
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: #VU91296

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-2021-47465

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 _GLOBAL() and REST_NVGPRS() functions in arch/powerpc/kvm/book3s_hv_rmhandlers.S. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.4 - 5.15 rc7

CPE2.3 External links

https://git.kernel.org/stable/c/80bbb0bc3a0288442f7fe6fc514f4ee1cb06ccb7
https://git.kernel.org/stable/c/fbd724c49bead048ae9fc1a5b7bff2fb3e54f855
https://git.kernel.org/stable/c/6d077c37c4643394b1bae9682da48164fc147ea8
https://git.kernel.org/stable/c/9b4416c5095c20e110c82ae602c254099b83b72f
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.76
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.15
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.156


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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