Buffer overflow in Linux kernel - CVE-2021-46920
Published: July 2, 2024 / Updated: May 13, 2025
Vulnerability identifier: #VU93627
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-46920
CWE-ID: CWE-119
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to manipulate data.
The vulnerability exists due to memory corruption within the process_misc_interrupts() function in drivers/dma/idxd/irq.c. A local user can manipulate data.
How to mitigate CVE-2021-46920
Install update from vendor's website.
Sources
- https://git.kernel.org/stable/c/a5ad12d5d69c63af289a37f05187a0c6fe93553d
- https://git.kernel.org/stable/c/02981a44a0e402089775416371bd2e0c935685f8
- https://git.kernel.org/stable/c/ea941ac294d75d0ace50797aebf0056f6f8f7a7f
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.32
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.16
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12