CVE-2021-3612: Debian Linux

High severity, CVSS 7.8. EPSS: 0.7% chance of exploitation in the next 30 days.

An out-of-bounds memory write flaw was found in the Linux kernel's joystick devices subsystem in versions before 5.9-rc1, in the way the user calls ioctl JSIOCSBTNMAP. This flaw allows a local user to crash the system or possibly escalate their privileges on the system. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Affected products

• Debian Debian Linux: version 9.0 only
• Fedoraproject Fedora: version 34 only
• Linux Linux Kernel: before 5.9.0 (fixed in 5.9.0)
• Netapp Cloud Backup: affected versions not specified
• Netapp h300e Firmware: affected versions not specified
• Netapp h300s Firmware: affected versions not specified
• Netapp h410c Firmware: affected versions not specified
• Netapp h410s Firmware: affected versions not specified
• Netapp h500e Firmware: affected versions not specified
• Netapp h500s Firmware: affected versions not specified
• Netapp h700e Firmware: affected versions not specified
• Netapp h700s Firmware: affected versions not specified
• Netapp Solidfire Baseboard Management Controller Firmware: affected versions not specified
• Oracle Communications Cloud Native Core Binding Support Function: version 22.1.3 only
• Oracle Communications Cloud Native Core Network Exposure Function: version 22.1.1 only
• Oracle Communications Cloud Native Core Policy: version 22.2.0 only
• Red Hat Enterprise Linux: version 7.0 only; version 8.0 only

Published 2021-07-09. Last modified 2026-06-17.