media: platform: mtk-mdp3: Fix SCP device refcounting
mdp_probe() first tries to get the SCP handle with scp_get(). When that
fails, it falls back to looking up the SCP platform device with
__get_pdev_by_id() and then reads its driver data.
The fallback lookup returns the platform device with a reference, just
like scp_get() does. However, the fallback path currently drops that
reference immediately after platform_get_drvdata(). The driver later
still calls scp_put(mdp->scp) unconditionally from the probe error path
and from mdp_video_device_release(), which drops the SCP device
reference again.
Keep the fallback reference until the existing scp_put() call, so that
the fallback path follows the same ownership rules as the scp_get()
path.
Analysis
Analysis and contextual insights are available on OpenCVE Cloud.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Linux | Linux | unaffected |
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| Linux | Linux | affected |
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No data.
No data.
No data available yet.
No vendor fix or workaround currently provided.
Additional remediation guidance may be available on OpenCVE Cloud.
Tracking
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Wed, 16 Sep 2026 10:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | In the Linux kernel, the following vulnerability has been resolved: media: platform: mtk-mdp3: Fix SCP device refcounting mdp_probe() first tries to get the SCP handle with scp_get(). When that fails, it falls back to looking up the SCP platform device with __get_pdev_by_id() and then reads its driver data. The fallback lookup returns the platform device with a reference, just like scp_get() does. However, the fallback path currently drops that reference immediately after platform_get_drvdata(). The driver later still calls scp_put(mdp->scp) unconditionally from the probe error path and from mdp_video_device_release(), which drops the SCP device reference again. Keep the fallback reference until the existing scp_put() call, so that the fallback path follows the same ownership rules as the scp_get() path. | |
| Title | media: platform: mtk-mdp3: Fix SCP device refcounting | |
| First Time appeared |
Linux
Linux linux Kernel |
|
| CPEs | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Linux
Linux linux Kernel |
|
| References |
|
MITRE
Status: PUBLISHED
Assigner: Linux
Published:
Updated: 2026-09-16T10:31:49.746Z
Reserved: 2026-09-11T19:38:34.773Z
Link: CVE-2026-89885
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-09-16T11:16:56.983
Modified: 2026-09-16T11:16:56.983
Link: CVE-2026-89885
Redhat
No data.
OpenCVE Enrichment
No data.
No weakness.