Bug 2454777 (CVE-2026-23426)

Summary: CVE-2026-23426 kernel: drm/logicvc: Fix device node reference leak in logicvc_drm_config_parse()
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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A flaw was found in the Linux kernel's `drm/logicvc` component. The `logicvc_drm_config_parse()` function, when processing device configurations, fails to properly release a reference to a device node. This oversight leads to a device node reference leak, which can result in resource exhaustion over time and potentially lead to a Denial of Service (DoS) condition.
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Description OSIDB Bzimport 2026-04-03 14:02:00 UTC 
In the Linux kernel, the following vulnerability has been resolved:

drm/logicvc: Fix device node reference leak in logicvc_drm_config_parse()

The logicvc_drm_config_parse() function calls of_get_child_by_name() to
find the "layers" node but fails to release the reference, leading to a
device node reference leak.

Fix this by using the __free(device_node) cleanup attribute to automatic
release the reference when the variable goes out of scope.
Comment 1 Alexander B 2026-04-03 14:48:36 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026040305-CVE-2026-23426-4c05@gregkh/T