Integer overflow in Linux kernel



| Updated: 2025-05-13
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-47432
CWE-ID CWE-190
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) Integer overflow

EUVDB-ID: #VU91179

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-47432

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

The vulnerability allows a local user to execute arbitrary code.

The vulnerability exists due to integer overflow within the __genradix_iter_peek() function in lib/generic-radix-tree.c. A local user can execute arbitrary code.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.1 - 6.7 rc7

CPE2.3 External links

https://git.kernel.org/stable/c/784d01f9bbc282abb0c5ade5beb98a87f50343ac
https://git.kernel.org/stable/c/ec298b958cb0c40d70c68079da933c8f31c5134c
https://git.kernel.org/stable/c/aa7f1827953100cdde0795289a80c6c077bfe437
https://git.kernel.org/stable/c/9492261ff2460252cf2d8de89cdf854c7e2b28a0
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.64
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5.13
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.3
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.7


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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