Bug 2467204 (CVE-2026-43264)

Summary: CVE-2026-43264 kernel: fbdev: of: display_timing: fix refcount leak in of_get_display_timings()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
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Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
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OS: Linux   
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A flaw was found in the Linux kernel's fbdev (framebuffer device) subsystem. This vulnerability, a reference count (refcount) leak, occurs within the of_get_display_timings() function. Specifically, when of_parse_phandle() returns a device_node with an incremented refcount, certain error paths fail to decrement this count. This can lead to resource exhaustion, potentially resulting in a denial of service (DoS) for affected systems.
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Description OSIDB Bzimport 2026-05-06 13:10:43 UTC 
In the Linux kernel, the following vulnerability has been resolved:

fbdev: of: display_timing: fix refcount leak in of_get_display_timings()

of_parse_phandle() returns a device_node with refcount incremented,
which is stored in 'entry' and then copied to 'native_mode'. When the
error paths at lines 184 or 192 jump to 'entryfail', native_mode's
refcount is not decremented, causing a refcount leak.

Fix this by changing the goto target from 'entryfail' to 'timingfail',
which properly calls of_node_put(native_mode) before cleanup.
Comment 1 Keith Grant 2026-05-06 23:46:51 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026050608-CVE-2026-43264-7177@gregkh/T