CVE-2026-74375

Summary

In the Linux kernel, the following vulnerability has been resolved:

md/raid1,raid10: fix deadlock in read error recovery path

raid1d and raid10d may resubmit a split md cloned bio while handling a read error. In this case, resubmitting the bio can lead to a deadlock if the array is suspended before md_handle_request() acquires an active_io reference via percpu_ref_tryget_live().

Since the cloned bio already holds an active_io reference, trying to acquire another reference via percpu_ref_tryget_live() can lead to a deadlock while the array is suspended.

Fix this by using percpu_ref_get() for md cloned bios.

Affected Software

Weaknesses

References

• https://git.kernel.org/stable/c/38777f014c37972868f1733a651c85288bb8a757
• https://git.kernel.org/stable/c/7b15c24f805339a585cfe7d72f446b7e88b9bcc0

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