In the Linux kernel, the following vulnerability has been resolved: drm/mediatek: Add missing IS_ERR check for ovl_adaptor platform device… (CVE-2026-98783)

The vulnerability in the Linux kernel's drm/mediatek component arises from the lack of an IS_ERR check after calling platform_device_register_data() for the ovl_adaptor platform device. If this function fails, it returns an ERR_PTR, which was previously unchecked and stored in ddp_comp[].dev. This invalid pointer is then passed to component_match_add() and mtk_ddp_comp_init(), which can lead to a kernel crash. The fix involved adding the missing IS_ERR() check to properly handle errors and avoid using invalid pointers.

The impact of this vulnerability is a potential kernel crash due to dereferencing an invalid pointer. This could lead to denial of service on affected systems running the vulnerable Linux kernel drm/mediatek driver.

A fix is available that adds the missing IS_ERR check to handle errors correctly. Users should apply the official kernel update that includes this patch to prevent kernel crashes caused by this issue.