CVE-2025-38393
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-07-25

Last updated on: 2025-11-03

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: NFSv4/pNFS: Fix a race to wake on NFS_LAYOUT_DRAIN We found a few different systems hung up in writeback waiting on the same page lock, and one task waiting on the NFS_LAYOUT_DRAIN bit in pnfs_update_layout(), however the pnfs_layout_hdr's plh_outstanding count was zero. It seems most likely that this is another race between the waiter and waker similar to commit ed0172af5d6f ("SUNRPC: Fix a race to wake a sync task"). Fix it up by applying the advised barrier.
CVSS Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2025-07-25
Last Modified
2025-11-03
Generated
2026-05-07
AI Q&A
2025-07-25
EPSS Evaluated
2026-05-05
NVD
CVE-2025-38393
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *
Helpful Resources
Exploitability
CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-UNKNOWN
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?

This vulnerability is a race condition in the Linux kernel's NFSv4/pNFS implementation related to the NFS_LAYOUT_DRAIN mechanism. It causes certain systems to hang during writeback operations because tasks wait indefinitely on a page lock or the NFS_LAYOUT_DRAIN bit, even though the expected outstanding count is zero. The issue arises from a timing race between the task waiting and the task waking, which was fixed by applying a synchronization barrier.


How can this vulnerability impact me? :

This vulnerability can cause systems using NFSv4/pNFS to hang or become unresponsive during writeback operations due to tasks waiting indefinitely on locks or flags. This can lead to degraded system performance or downtime in environments relying on NFS for file storage.


Ask Our AI Assistant
Need more information? Ask your question to get an AI reply (Powered by our expertise)
0/70
EPSS Chart