CVE-2026-46194 Details

A race condition vulnerability has been identified in the F2FS (Flash-Friendly File System) implementation of the Linux kernel. This issue arises during the destruction of extent nodes, where the function responsible for cleaning up these nodes does not properly set a flag to indicate that no new extent nodes should be added. When this function is called while the inode is marked for synchronous writeback, concurrent write operations can interfere with the node destruction process. This leads to a situation where new extent nodes are inserted into the same tree that is being cleared, causing a consistency error that triggers a kernel bug assertion. Additionally, the mechanism for updating the extent tree range does not adequately protect against similar race conditions, leaving certain types of updates vulnerable to interference from concurrent write operations.

Users can apply the latest patches available in the Linux kernel stable tree to address this vulnerability.