CVE-2021-39257: Debian Linux

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

A crafted NTFS image with an unallocated bitmap can lead to a endless recursive function call chain (starting from ntfs_attr_pwrite), causing stack consumption in NTFS-3G < 2021.8.22.

Affected products

• Debian Debian Linux: version 9.0 only; version 10.0 only; version 11.0 only
• Tuxera Ntfs-3g: before 2021.8.22 (fixed in 2021.8.22)

Published 2021-09-07. Last modified 2026-06-17.