CVE-2025-68168

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

Description A flaw exists in the Linux kernel's JFS (Journaled File System) transaction manager. The txInit() function does not properly initialize the TxBlock[0].waitor waitqueue, leading to a system crash when txEnd(0) is called on read-only filesystems. Specifically, when a filesystem is mounted read-only, txBegin() returns a transaction ID (tid) of 0, indicating no transaction. However, txEnd(0) is still invoked, attempting to access the uninitialized TxBlock[0].waitor waitqueue through the tid to tblock(0) function. This results in a 'non-static key' lockdep warning and a system crash. The issue is resolved by ensuring all transaction blocks, including TxBlock[0], have their waitqueues properly initialized during txInit().

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