media: platform: mtk-mdp3: Fix SCP device refcounting (CVE-2026-89885) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-89885

media: platform: mtk-mdp3: Fix SCP device refcounting

Answer in brief

CVE-2026-89885 records a Unknown severity vulnerability in media: platform: mtk-mdp3: Fix SCP device refcounting. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 16, 2026Updated Sep 16, 2026Source checked Sep 16, 2026First seen by HOL Sep 16, 2026Material review Sep 16, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=db4d27e6bbbf511f9cdb33f682535a0a3cb7c403 <dce13bd9bade3ecc1acb7579397f24743850997f \|\| >=31ba1a4d7a5d9466f6ef4910a372b8200f8aad19 <252850653569fdb1a259937e02325cf32c8f0970 \|\| >=8f6f3aa21517ef34d50808af0c572e69580dca20 <0259ade4c4ceaf1e184a7c1aea8071ad398f9b6f \|\| >=8f6f3aa21517ef34d50808af0c572e69580dca20 <55793e4665b7f15151e6f5ab51ca980e73abed5d \|\| >=6.12.64 <6.12.110 \|\| >=6.18.4 <6.18.51	dce13bd9bade3ecc1acb7579397f24743850997f, 252850653569fdb1a259937e02325cf32c8f0970, 0259ade4c4ceaf1e184a7c1aea8071ad398f9b6f, 55793e4665b7f15151e6f5ab51ca980e73abed5d, 6.12.110, 6.18.51
Linux/Linuxgeneric	6.19	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to dce13bd9bade3ecc1acb7579397f24743850997f if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 16, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.