CVE-2025-68369

Technical Description

In the Linux kernel, the following vulnerability has been resolved:

ntfs3: init run lock for extend inode

After setting the inode mode of $Extend to a regular file, executing the

truncate system call will enter the do_truncate() routine, causing the

run_lock uninitialized error reported by syzbot.

Prior to patch 4e8011ffec79, if the inode mode of $Extend was not set to

a regular file, the do_truncate() routine would not be entered.

Add the run_lock initialization when loading $Extend.

syzbot reported:

INFO: trying to register non-static key.

Call Trace:

dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120

assign_lock_key+0x133/0x150 kernel/locking/lockdep.c:984

register_lock_class+0x105/0x320 kernel/locking/lockdep.c:1299

__lock_acquire+0x99/0xd20 kernel/locking/lockdep.c:5112

lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868

down_write+0x96/0x1f0 kernel/locking/rwsem.c:1590

ntfs_set_size+0x140/0x200 fs/ntfs3/inode.c:860

ntfs_extend+0x1d9/0x970 fs/ntfs3/file.c:387

ntfs_se

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References