CVE-2021-31916: Debian Linux

Medium severity, CVSS 6.7. EPSS: 0.7% chance of exploitation in the next 30 days.

An out-of-bounds (OOB) memory write flaw was found in list_devices in drivers/md/dm-ioctl.c in the Multi-device driver module in the Linux kernel before 5.12. A bound check failure allows an attacker with special user (CAP_SYS_ADMIN) privilege to gain access to out-of-bounds memory leading to a system crash or a leak of internal kernel information. The highest threat from this vulnerability is to system availability.

Affected products

• Debian Debian Linux: version 9.0 only
• Linux Linux Kernel: before 5.12 (fixed in 5.12)
• Red Hat Enterprise Linux: version 7.0 only; version 8.0 only

Published 2021-05-06. Last modified 2026-06-17.