CVE-2021-3753: Linux Kernel

Medium severity, CVSS 4.7. EPSS: 0.4% chance of exploitation in the next 30 days.

A race problem was seen in the vt_k_ioctl in drivers/tty/vt/vt_ioctl.c in the Linux kernel, which may cause an out of bounds read in vt as the write access to vc_mode is not protected by lock-in vt_ioctl (KDSETMDE). The highest threat from this vulnerability is to data confidentiality.

Affected products

• Linux Linux Kernel: before 5.15 (fixed in 5.15)
• Netapp Active Iq Unified Manager: affected versions not specified
• Netapp Bootstrap OS: affected versions not specified
• Netapp Element Software: 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 h500s Firmware: affected versions not specified
• Netapp h700s Firmware: affected versions not specified
• Netapp Hci Management Node: affected versions not specified
• Netapp Solidfire: affected versions not specified
• Red Hat Enterprise Linux: version 7.0 only; version 8.0 only

Published 2022-02-16. Last modified 2026-06-17.