Bug 2426055 (CVE-2022-50887)

Summary: CVE-2022-50887 kernel: regulator: core: fix unbalanced of node refcount in regulator_dev_lookup()
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 2025-12-30 13:05:20 UTC 
In the Linux kernel, the following vulnerability has been resolved:

regulator: core: fix unbalanced of node refcount in regulator_dev_lookup()

I got the the following report:

  OF: ERROR: memory leak, expected refcount 1 instead of 2,
  of_node_get()/of_node_put() unbalanced - destroy cset entry:
  attach overlay node /i2c/pmic@62/regulators/exten

In of_get_regulator(), the node is returned from of_parse_phandle()
with refcount incremented, after using it, of_node_put() need be called.
Comment 1 Alexander B 2025-12-31 12:23:59 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025123014-CVE-2022-50887-6f16@gregkh/T