CVE-2025-68186
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-12-16

Last updated on: 2025-12-18

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Do not warn in ring_buffer_map_get_reader() when reader catches up The function ring_buffer_map_get_reader() is a bit more strict than the other get reader functions, and except for certain situations the rb_get_reader_page() should not return NULL. If it does, it triggers a warning. This warning was triggering but after looking at why, it was because another acceptable situation was happening and it wasn't checked for. If the reader catches up to the writer and there's still data to be read on the reader page, then the rb_get_reader_page() will return NULL as there's no new page to get. In this situation, the reader page should not be updated and no warning should trigger.
CVSS Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2025-12-16
Last Modified
2025-12-18
Generated
2026-05-07
AI Q&A
2025-12-16
EPSS Evaluated
2026-05-05
NVD
CVE-2025-68186
EUVD
EUVD-2025-203710
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 involves the Linux kernel's ring buffer implementation, specifically the function ring_buffer_map_get_reader(). The function was issuing warnings incorrectly when the reader caught up to the writer but still had data to read on the current reader page. This situation was not properly checked, causing unnecessary warnings. The fix ensures that when the reader catches up and there is no new page to get, the reader page is not updated and no warning is triggered.


How can this vulnerability impact me? :

This vulnerability causes incorrect warnings in the Linux kernel ring buffer system when the reader catches up to the writer. While it does not indicate a security breach or data loss, it may lead to confusion or misinterpretation of system logs or behavior due to these unnecessary warnings.


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