CVE-2021-38203: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.4% chance of exploitation in the next 30 days.

btrfs in the Linux kernel before 5.13.4 allows attackers to cause a denial of service (deadlock) via processes that trigger allocation of new system chunks during times when there is a shortage of free space in the system space_info.

Affected products

• Linux Linux Kernel: before 5.13.4 (fixed in 5.13.4)
• Netapp Element Software: affected versions not specified
• Netapp Hci Bootstrap OS: affected versions not specified
• Netapp Hci Management Node: affected versions not specified
• Netapp Solidfire: affected versions not specified

Published 2021-08-08. Last modified 2026-06-17.