CVE-2022-49678: soc: bcm: brcmstb: pm: pm-arm: Fix refcount leak in brcmstb_pm_probe

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-02-26 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: soc: bcm: brcmstb: pm: pm-arm: Fix refcount leak in brcmstb_pm_probe of_find_matching_node() returns a node pointer with refcount incremented, we should use of_node_put() on it when not need anymore. Add missing of_node_put() to avoid refcount leak. In brcmstb_init_sram, it pass dn to of_address_to_resource(), of_address_to_resource() will call of_find_device_by_node() to take reference, so we should release the reference returned by of_find_matching_node().

Affected products

Linux kernel: from 4.15 before 4.19.250; from 4.20 before 5.4.202; from 5.5 before 5.10.127; from 5.11 before 5.15.51; from 5.16 before 5.18.8; 5.19-rc1, 5.19-rc2, 5.19-rc3 — fixed in 4.19.250, 5.10.127, 5.15.51, 5.18.8, 5.4.202

How to fix

Upgrade to a fixed version: Linux kernel 4.19.250, 5.10.127, 5.15.51, 5.18.8. Check the vendor advisory for mitigations.

References

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