CVE-2021-30002: Debian Linux

Medium severity, CVSS 6.2. EPSS: 0.4% chance of exploitation in the next 30 days.

An issue was discovered in the Linux kernel before 5.11.3 when a webcam device exists. video_usercopy in drivers/media/v4l2-core/v4l2-ioctl.c has a memory leak for large arguments, aka CID-fb18802a338b.

Affected products

• Debian Debian Linux: version 9.0 only
• Linux Linux Kernel: before 5.11.3 (fixed in 5.11.3)

Published 2021-04-02. Last modified 2026-06-17.