CVE-2020-29368: Linux Kernel

High severity, CVSS 7.0. EPSS: 0.4% chance of exploitation in the next 30 days.

An issue was discovered in __split_huge_pmd in mm/huge_memory.c in the Linux kernel before 5.7.5. The copy-on-write implementation can grant unintended write access because of a race condition in a THP mapcount check, aka CID-c444eb564fb1.

Affected products

• Linux Linux Kernel: from 4.5.5, before 4.9.228 (fixed in 4.9.228); from 4.10, before 4.14.185 (fixed in 4.14.185); from 4.15, before 4.19.129 (fixed in 4.19.129); from 4.20, before 5.4.48 (fixed in 5.4.48); from 5.5, before 5.7.5 (fixed in 5.7.5)
• Netapp Cloud Backup: affected versions not specified
• Netapp Element Software: affected versions not specified
• Netapp h410c Firmware: 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 2020-11-28. Last modified 2026-06-17.