{"id":"CVE-2026-94370","state":"PUBLISHED","title":"Memory corruption (double free / use-after-free) vulnerability in core string handling impacts Qt for MCUs","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.","publishedAt":"2026-10-14T05:43:27.953Z","updatedAt":"2026-10-14T16:02:30.639Z","severity":{"score":6.5,"label":"Medium","version":"4.0","vector":"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":"Qt"},"assigner":"Qt","products":["qt Qt_for_MCUs"],"affected":[{"vendor":"qt","product":"Qt_for_MCUs","defaultStatus":"unaffected","versions":[{"version":"2.12.1","status":"affected","lessThan":"2.12.3","versionType":"python"}],"modules":["qul"]}],"references":["https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-94370:"],"weaknesses":["CWE-415","CWE-416","CWE-590","CWE-665"],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/94xxx/CVE-2026-94370.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-94370","state":"PUBLISHED","datePublished":"2026-10-14T05:43:27.953Z","dateUpdated":"2026-10-14T16:02:30.639Z","assignerShortName":"Qt","assignerOrgId":"a59d8014-47c4-4630-ab43-e1b13cbe58e3","dateReserved":"2026-09-21T11:36:04.324Z"},"containers":{"cna":{"title":"Memory corruption (double free / use-after-free) vulnerability in core string handling impacts Qt for MCUs","descriptions":[{"lang":"en","value":"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":[{"vendor":"qt","product":"Qt_for_MCUs","defaultStatus":"unaffected","versions":[{"version":"2.12.1","status":"affected","lessThan":"2.12.3","versionType":"python"}],"modules":["qul"]}],"references":[{"url":"https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-94370:","tags":["issue-tracking"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"LOW","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subAvailabilityImpact":"HIGH","exploitMaturity":"UNREPORTED","Safety":"PRESENT","Automatable":"NO","Recovery":"USER","valueDensity":"DIFFUSE","vulnerabilityResponseEffort":"MODERATE","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"MEDIUM","baseScore":6.5,"vectorString":"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-415","lang":"en","description":"CWE-415 Double Free","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-416","lang":"en","description":"CWE-416 Use After Free","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-590","lang":"en","description":"CWE-590 Free of Memory not on the Heap","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-665","lang":"en","description":"CWE-665 Improper Initialization","type":"CWE"}]}],"providerMetadata":{"shortName":"Qt","orgId":"a59d8014-47c4-4630-ab43-e1b13cbe58e3","dateUpdated":"2026-10-14T05:43:27.953Z"},"impacts":[{"capecId":"CAPEC-153","descriptions":[{"lang":"en","value":"CAPEC-153 Input Data Manipulation"}]}],"cpeApplicability":[{"operator":"OR","nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:qt:qt_for_mcus:*:*:*:*:*:*:*:*","versionStartIncluding":"2.12.1","versionEndExcluding":"2.12.3"}]}]}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 1.0.5"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-14T16:02:10.297104Z","id":"CVE-2026-94370","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-14T16:02:30.639Z"}}]}}}