drm/mediatek: Fix ovl adaptor platform device leak

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/mediatek: Fix ovl adaptor platform device leak mtk_drm_probe() creates an OVL adaptor platform device with platform_device_register_data() when the display pipeline requires the OVL adaptor. If a later initialization step fails, the probe error path releases the DRM resources without unregistering the already registered OVL adaptor device. The normal remove path likewise leaves the device registered after the DRM driver is unbound. Keep track of whether the OVL adaptor was successfully registered and unregister it on probe failure. Also recover the platform device from the stored DDP component device and unregister it during normal removal. The issue was identified by a static analysis tool I developed and confirmed by manual review.

Timeline

1. Oct 18, 2026, 3:48 PM UTCCVE published
2. Oct 21, 2026, 12:56 PM UTCRecord last updated

Affected versions

• Linux Linux

  From 0d9eee9118b77e51eeafc5bf4d008fac97035d56 · fixed in 03fb1c657028cb9f189b400f3adb46e3ba676aa5; From 0d9eee9118b77e51eeafc5bf4d008fac97035d56 · fixed in 3d85bd738aba61df14dfaf8fe638e2172d8427bf; From 0d9eee9118b77e51eeafc5bf4d008fac97035d56 · fixed in 629458b7e49559593823e351535294db17331be7; From 0d9eee9118b77e51eeafc5bf4d008fac97035d56 · fixed in 8e3a350075b556f2fed4517705935bfee4529fb6; From 0d9eee9118b77e51eeafc5bf4d008fac97035d56 · fixed in 048739be3e9cacae5301b68245668002fe6f0ce5

• Linux Linux

  6.4

• KernelLinux

  From 6.4.0 · fixed in 6.6.160; From 6.7.0 · fixed in 6.12.113; From 6.13.0 · fixed in 6.18.56; From 6.19.0 · fixed in 7.2.10

References 5