CVE-2026-94370— Memory corruption (double free / use-after-free) vulnerability in core string handling impacts Qt for MCUs
Quick assessment
Affected
qt Qt_for_MCUs
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
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 t
Affected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| qt | Qt_for_MCUs | 2.12.1< 2.12.3 |
affected |
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I. Basic Information for CVE-2026-94370
Vulnerability Information
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Vulnerability Title
Memory corruption (double free / use-after-free) vulnerability in core string handling impacts Qt for MCUs
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
双重释放
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| qt | Qt_for_MCUs | 2.12.1 ~ 2.12.3 | - |
|
II. Public POCs for CVE-2026-94370
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-94370 (1)
-
List of known vulnerabilities in Qt products - Qt Wiki issue-tracking
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V. Comments for CVE-2026-94370
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