#VU93740 Improper privilege management in Linux kernel - CVE-2021-46918
Published: July 3, 2024 / Updated: May 13, 2025
Vulnerability identifier: #VU93740
Vulnerability risk: 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-2021-46918
CWE-ID: CWE-269
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 improperly imposed permissions within the idxd_setup_interrupts() and idxd_shutdown() functions in drivers/dma/idxd/init.c, within the idxd_device_drain_pasid() function in drivers/dma/idxd/device.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.