CVE-2025-39734: Debian Linux

Medium severity, CVSS 5.5. EPSS: 0.1% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: Revert "fs/ntfs3: Replace inode_trylock with inode_lock" This reverts commit 69505fe98f198ee813898cbcaf6770949636430b. Initially, conditional lock acquisition was removed to fix an xfstest bug that was observed during internal testing. The deadlock reported by syzbot is resolved by reintroducing conditional acquisition. The xfstest bug no longer occurs on kernel version 6.16-rc1 during internal testing. I assume that changes in other modules may have contributed to this.

Affected products

• Debian Debian Linux: version 11.0 only
• Linux Linux Kernel: from 5.15.165, before 5.15.190 (fixed in 5.15.190); from 6.1.103, before 6.1.148 (fixed in 6.1.148); from 6.6.44, before 6.6.102 (fixed in 6.6.102); from 6.10.3, before 6.12.42 (fixed in 6.12.42); from 6.13, before 6.15.10 (fixed in 6.15.10); from 6.16, before 6.16.1 (fixed in 6.16.1)

Published 2025-09-07. Last modified 2026-06-17.