CVE-2025-71194

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

Description The Linux kernel contains a flaw in the btrfs subsystem related to transaction handling. Specifically, the wait current trans() function does not properly consider transaction types when waiting for blocked transactions, potentially leading to a deadlock. This can occur when a worker processing an ordered extent calls start transaction() with TRANS JOIN while another transaction is in the TRANS STATE COMMIT DOING state. The issue arises because the check against the btrfs blocked trans types[] array is missing in wait current trans(). The deadlock involves two transactions and pending ordered extents, where each transaction waits for the other, causing a system stall. The call stacks provided illustrate the sequence of events leading to the deadlock, involving functions like btrfs finish ordered io(), start transaction(), join transaction(), wait current trans(), and btrfs commit transaction().

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