What’s Vulnerable › Vulnerabilities

CVE-2025-68374: md: fix rcu protection in md_wakeup_thread

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-24 · updated 2026-10-21

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.

Affected products

• Linux kernel: 6.5 — fixed in 6.19

How to fix

Upgrade to a fixed version: Linux kernel 6.19. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0dc76205549b4c25705e54345f211b9f66e018a0
• https://git.kernel.org/stable/c/21989cb5034c835b212385a2afadf279d8069da0
• https://git.kernel.org/stable/c/a4bd1caf591faeae44cb10b6517e7dacb5139bda
• https://git.kernel.org/stable/c/dc6d1249ee35c1c76700b4b96281daeb7637bce1
• https://git.kernel.org/stable/c/f98b191f78124405294481dea85f8a22a3eb0a59

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