CVE-2026-94370Memory corruption (double free / use-after-free) vulnerability in core string handling impacts Qt for MCUs
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 6.5 MEDIUM (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:H/E:U/S:P/AU:N/R:U/V:D/RE:M
- Weakness (CWE)
- CWE-415, CWE-416, CWE-590, CWE-665
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Qt
- NVD analysis
- Deferred
- Record last updated
- Oct 14, 2026
- First seen by InfoSec Signals
- Oct 14, 2026
Affected products
qt Qt_for_MCUs qt:for_mcus (from the name) | from 2.12.1 before 2.12.3 | CNA record |
References
- https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-94370:issue-tracking
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.