PT-2025-51581 · Linux+4 · Linux Kernel+4
Published
2025-09-18
·
Updated
2026-05-07
·
CVE-2025-68168
CVSS v2.0
4.6
Medium
| Vector | AV:L/AC:L/Au:S/C:N/I:N/A:C |
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.
Exploit
Improper Initialization
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Weakness Enumeration
Related Identifiers
Affected Products
Debian
Jfs
Linuxmint
Linux Kernel
Ubuntu