{"id":"CVE-2026-94370","title":"A defect in the Qt for MCUs core string handling causes heap memory corruption","summary":"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 t…","severity":"high","cvss":8.1,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-415","CWE-416","CWE-590","CWE-665","CWE-1341"],"vendor":"Red Hat","product":"Red Hat Enterprise Linux 7","affected":["enterprise_linux 10","enterprise_linux 6","enterprise_linux 7","enterprise_linux 8","enterprise_linux 9","hardened_images"],"published":"2026-10-14","updated":"2026-10-15","sourceUpdated":"2026-10-15T15:53:08.287","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-94370","references":[{"url":"https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-94370:","label":"a59d8014-47c4-4630-ab43-e1b13cbe58e3"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-94370.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-94370"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2552092"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-94370"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-94370"}],"tags":["nvd","csaf","vex","red-hat","cve.org"],"epss":0.00332,"epssPercentile":0.26291,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-14T16:02:10.297104Z"},"cvssSource":"vendor","scores":{"vendor":8.1,"cna":6.5},"ingestedAt":"2026-10-14T07:21:04.831Z","slug":"CVE-2026-94370","body":"## Overview\n\nA 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat Hardened Images · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-10-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-94370.json)","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":44.6,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":220015,"id":"CVE-2026-94370","ts":1791978475505,"field":"cvss","old":null,"new":"8.1"},{"seq":220014,"id":"CVE-2026-94370","ts":1791978475505,"field":"severity","old":"none","new":"high"}]}