Division by zero in Linux kernel - CVE-2021-47080
Published: June 8, 2024 / Updated: May 13, 2025
Vulnerability identifier: #VU91380
CSH Severity: Low
CVSSv4.0: 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-2021-47080
CWE-ID: CWE-369
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a division by zero error within the UVERBS_HANDLER() function in drivers/infiniband/core/uverbs_std_types_device.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
External links
- https://git.kernel.org/stable/c/66ab7fcdac34b890017f04f391507ef5b2b89a13
- https://git.kernel.org/stable/c/e6871b4270c05f8b212e7d98aee82b357972c80a
- https://git.kernel.org/stable/c/54d87913f147a983589923c7f651f97de9af5be1
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.40
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.7
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13