drm/mediatek: Fix ovl adaptor platform device leak

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Summary

CVECVE-2026-98782
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-18 16:17:32 UTC
Updated2026-10-19 10:19:42 UTC
DescriptionIn 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 0d9eee9118b77e51eeafc5bf4d008fac97035d56 3d85bd738aba61df14dfaf8fe638e2172d8427bf git Not specified
CNA Linux Linux affected 0d9eee9118b77e51eeafc5bf4d008fac97035d56 629458b7e49559593823e351535294db17331be7 git Not specified
CNA Linux Linux affected 0d9eee9118b77e51eeafc5bf4d008fac97035d56 8e3a350075b556f2fed4517705935bfee4529fb6 git Not specified
CNA Linux Linux affected 0d9eee9118b77e51eeafc5bf4d008fac97035d56 048739be3e9cacae5301b68245668002fe6f0ce5 git Not specified
CNA Linux Linux affected 6.4 Not specified
CNA Linux Linux unaffected 6.4 semver Not specified
CNA Linux Linux unaffected 6.12.113 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.56 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.10 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/8e3a350075b556f2fed4517705935bfee4529fb6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/3d85bd738aba61df14dfaf8fe638e2172d8427bf 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/629458b7e49559593823e351535294db17331be7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/048739be3e9cacae5301b68245668002fe6f0ce5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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