Medium [CVE-2026-68215] Unregister v4l2_device on probe failure
This medium-severity Red Hat Linux advisory covers CVE-2026-68215 affecting Red Hat OpenShift Container Platform 4.
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Summary
In the Linux kernel, the following vulnerability has been resolved: media: radio-si476x: Unregister v4l2_device on probe failure si476x_radio_probe() registers radio->v4l2dev before allocating the V4L2 controls and before registering the video device.
If any of those later steps fails, probe returns through the exit label after freeing only the control handler. A failed probe does not call si476x_radio_remove(), so the v4l2_device_unregister() there is not reached.
This leaves the parent device reference taken by v4l2_device_register() behind on the error path. During the device probing process, if certain initialization steps fail, the `v4l2_device` may not be properly unregistered.
This oversight can lead to a resource leak, specifically a persistent parent device reference. A local attacker could potentially exploit this to cause a denial of service by exhausting system resources.
This issue affects Silicon Labs si476x radio. v4l2_device registered before controls/video device; probe fail leaves registered device. Systems without si476x radio are not affected.
Red Hat severity: Moderate — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-772.
Affected Red Hat products: Red Hat OpenShift Container Platform 4. Red Hat does not currently list a fixing RHSA for this CVE.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · medium-confidence parse· fetched 2 days ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · medium-confidence parse· fetched 2 days ago·verify at source
Mitigation
The source record does not include mitigation steps. That is not a statement that no fix exists — read the vendor advisory below for the authoritative guidance.
Official advisory · medium-confidence parse· fetched 2 days ago·verify at source
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