CVE-2025-21811

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A issue in the Linux kernel has been identified, specifically in the nilfs2 component. The nilfs lookup dirty data buffers() function accesses buffers attached to dirty data folios/pages without proper locking, potentially leading to use after free issues. This can occur when nilfs clear folio dirty() is called asynchronously, causing buffers to lose their dirty state protection and be unintentionally freed by try to free buffers(). The problem arises from a race condition that has been addressed by adjusting the lock section in the nilfs lookup dirty data buffers() function.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.