CVE-2025-71106

A logic error was found in the Linux kernel's power management filesystem freeze callback. The freeze_all_ptr check in filesystems_freeze_callback() has reversed logic, causing all filesystems to be frozen when filesystem_freeze_enabled is false (the opposite of intended behavior). This triggers WARN_ON_ONCE() in __set_task_frozen() when attempting to freeze filesystems that are not prepared for freezing.

This bug affects system suspend/hibernate operations. The reversed logic causes unexpected filesystem freezing behavior during power state transitions, resulting in kernel warnings. The issue was introduced in a commit intended to always freeze efivarfs during power management operations. Systems may experience warnings during suspend/resume cycles.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.