CVE-2021-33656: Debian Linux

Medium severity, CVSS 6.8. EPSS: 0.6% chance of exploitation in the next 30 days.

When setting font with malicous data by ioctl cmd PIO_FONT,kernel will write memory out of bounds.

Affected products

• Debian Debian Linux: version 10.0 only
• Linux Linux Kernel: before 5.10.127 (fixed in 5.10.127)
• Openatom Openeuler: version 20.03 only

Published 2022-07-18. Last modified 2026-10-08.