CVE-2021-33655: Debian Linux

Medium severity, CVSS 6.7. EPSS: 0.3% chance of exploitation in the next 30 days.

When sending malicous data to kernel by ioctl cmd FBIOPUT_VSCREENINFO,kernel will write memory out of bounds.

Affected products

• Debian Debian Linux: version 10.0 only; version 11.0 only
• Linux Linux Kernel: before 5.19 (fixed in 5.19); version 5.19 only

Published 2022-07-18. Last modified 2026-06-17.