Bug 2422726 (CVE-2025-68218)

Summary: CVE-2025-68218 kernel: nvme-multipath: fix lockdep WARN due to partition scan work
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2025-12-16 14:06:45 UTC 
In the Linux kernel, the following vulnerability has been resolved:

nvme-multipath: fix lockdep WARN due to partition scan work

Blktests test cases nvme/014, 057 and 058 fail occasionally due to a
lockdep WARN. As reported in the Closes tag URL, the WARN indicates that
a deadlock can happen due to the dependency among disk->open_mutex,
kblockd workqueue completion and partition_scan_work completion.

To avoid the lockdep WARN and the potential deadlock, cut the dependency
by running the partition_scan_work not by kblockd workqueue but by
nvme_wq.
Comment 1 Alexander B 2025-12-17 00:19:55 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025121632-CVE-2025-68218-4aee@gregkh/T