CVE-2026-94370 — Memory corruption (double free / use-after-free) vulnerability in core string handling impacts Qt for MCUs

CVE-2026-94370

Memory corruption (double free / use-after-free) vulnerability in core string handling impacts Qt for MCUs PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
qt / Qt_for_MCUs	affected 2.12.1 before 2.12.3

CWE

CWE-415, CWE-416, CWE-590, CWE-665

References

https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-94370:

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.