CVE-2025-68374
Unknown Unknown - Not Provided
Use-After-Free in Linux Kernel md Component Due to RCU Misuse

Publication date: 2025-12-24

Last updated on: 2025-12-24

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: md: fix rcu protection in md_wakeup_thread We attempted to use RCU to protect the pointer 'thread', but directly passed the value when calling md_wakeup_thread(). This means that the RCU pointer has been acquired before rcu_read_lock(), which renders rcu_read_lock() ineffective and could lead to a use-after-free.
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Meta Information
Published
2025-12-24
Last Modified
2025-12-24
Generated
2026-06-16
AI Q&A
2025-12-24
EPSS Evaluated
2026-06-15
NVD
CVE-2025-68374
EUVD
EUVD-2025-205080
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *
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Exploitability
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability in the Linux kernel involves improper use of Read-Copy-Update (RCU) protection for a pointer named 'thread' in the md_wakeup_thread function. The pointer was passed directly without proper RCU locking, causing rcu_read_lock() to be ineffective. This flaw could lead to a use-after-free condition, where memory is accessed after it has been freed.

Impact Analysis

The vulnerability could lead to a use-after-free scenario, which may cause system instability, crashes, or potentially allow an attacker to execute arbitrary code or escalate privileges by exploiting the freed memory.

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