CVE-2026-63813

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

Description A race condition in the F2FS (Flash-Friendly File System) implementation can lead to list corruption and kernel panics, particularly when the F2FS partition is nearly full. The issue occurs when a page is freed to the buddy allocator without being removed from the Least Recently Used (LRU) list. This happens due to a race between the garbage collection path in move data block(), which evicts folios via folio end dropbehind(), and the folio splitting process in split folio to order(). Specifically, if folio isolate lru() clears the PG lru flag while folio put() is executing, the system may skip lruvec del folio(), leaving a stale link in the LRU list that eventually triggers a kernel BUG.

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