CVE-2026-89576

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

Description A memory leak occurs in the dm-era component during a failed snapshot operation. The metadata take snap() function increases the live superblock reference count, and dm tm shadow block() allocates a new block for the metadata snapshot. If the subsequent dm sm inc block() call for writeset tree root or era array root fails, the function unlocks the clone and returns without returning the allocated shadow block to the metadata space map. This results in the permanent leak of one metadata block for every failed snapshot attempt.

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