Bug 2355453 (CVE-2022-49752)

Summary: CVE-2022-49752 kernel: device property: fix of node refcount leak in fwnode_graph_get_next_endpoint()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: low    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-03-27 17:02:19 UTC 
In the Linux kernel, the following vulnerability has been resolved:

device property: fix of node refcount leak in fwnode_graph_get_next_endpoint()

The 'parent' returned by fwnode_graph_get_port_parent()
with refcount incremented when 'prev' is not NULL, it
needs be put when finish using it.

Because the parent is const, introduce a new variable to
store the returned fwnode, then put it before returning
from fwnode_graph_get_next_endpoint().
Comment 1 Robb Gatica 2025-03-28 00:26:36 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025032700-CVE-2022-49752-19a3@gregkh/T