Bug 2416793 (CVE-2025-40213)

Summary: CVE-2025-40213 kernel: Bluetooth: MGMT: fix crash in set_mesh_sync and set_mesh_complete
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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OS: Linux   
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Description OSIDB Bzimport 2025-11-24 17:01:16 UTC 
In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: MGMT: fix crash in set_mesh_sync and set_mesh_complete

There is a BUG: KASAN: stack-out-of-bounds in set_mesh_sync due to
memcpy from badly declared on-stack flexible array.

Another crash is in set_mesh_complete() due to double list_del via
mgmt_pending_valid + mgmt_pending_remove.

Use DEFINE_FLEX to declare the flexible array right, and don't memcpy
outside bounds.

As mgmt_pending_valid removes the cmd from list, use mgmt_pending_free,
and also report status on error.
Comment 1 Jon Moroney 2025-11-24 17:55:34 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025112447-CVE-2025-40213-c55f@gregkh/T