Double Free in Qt For Mcus

CVE-2026-94370

A defect in the Qt for MCUs core string handling causes heap memory corruption. When an application passes text into Qt Quick Ultralite using the public Qul::String interface type, and that text is held in a std::string, the conversion to the internal string type copies the pointer without taking ownership of it. Two objects then release the same memory, producing a double free, an invalid free, or a use-after-free.

Vulnerability class: Double Free

Published · last modified .

EPSS exploit prediction

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Affected products

Weakness classification (CWE)

References