CVE-2026-89885
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.
How to fix
- Linux Linuxdce13bd9bade3ecc1acb7579397f24743850997f, 252850653569fdb1a259937e02325cf32c8f0970, 0259ade4c4ceaf1e184a7c1aea8071ad398f9b6f, 55793e4665b7f15151e6f5ab51ca980e73abed5d, 6.12.110, 6.18.51 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | db4d27e6bbbf511f9cdb33f682535a0a3cb7c403 ≤ v < dce13bd9bade3ecc1acb7579397f24743850997f, 31ba1a4d7a5d9466f6ef4910a372b8200f8aad19 ≤ v < 252850653569fdb1a259937e02325cf32c8f0970, 8f6f3aa21517ef34d50808af0c572e69580dca20 ≤ v < 0259ade4c4ceaf1e184a7c1aea8071ad398f9b6f, 8f6f3aa21517ef34d50808af0c572e69580dca20 ≤ v < 55793e4665b7f15151e6f5ab51ca980e73abed5d, 6.12.64 ≤ v < 6.12.110, 6.18.4 ≤ v < 6.18.51, 6.19 | dce13bd9bade3ecc1acb7579397f24743850997f, 252850653569fdb1a259937e02325cf32c8f0970, 0259ade4c4ceaf1e184a7c1aea8071ad398f9b6f, 55793e4665b7f15151e6f5ab51ca980e73abed5d, 6.12.110, 6.18.51 |
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