{"id":"UBUNTU-CVE-2026-116014","details":"open62541 1.5.0 before 1.5.7 contains an integer overflow in UA_DataType_fromStructureDescription() that wraps the 16-bit memSize field for large custom structure definitions. A malicious OPC UA server can supply DataType definitions via UA_Client_getRemoteDataTypes(), causing decodeBinaryStructure() to overflow the heap, crashing clients or enabling code execution.","modified":"2026-10-27T04:16:52.058368329Z","published":"2026-10-26T00:00:00Z","upstream":["CVE-2026-116014"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-116014"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-116014"},{"type":"REPORT","url":"https://github.com/open62541/open62541/blob/v1.5.6/src/ua_types_definition.c#L274"},{"type":"REPORT","url":"https://github.com/open62541/open62541/commit/0cf4806768c493bc6ccffcd4419da24153b970ec"},{"type":"REPORT","url":"https://github.com/open62541/open62541/pull/8298"},{"type":"REPORT","url":"https://github.com/open62541/open62541/pull/8302"},{"type":"REPORT","url":"https://github.com/open62541/open62541/releases/tag/v1.5.7"},{"type":"REPORT","url":"https://www.vulncheck.com/advisories/open62541-1.5.0-before-1.5.7-integer-overflow-heap-buffer-overflow-via-custom-datatype"}],"affected":[{"package":{"name":"open62541","ecosystem":"Ubuntu:26.10","purl":"pkg:deb/ubuntu/open62541?arch=source&distro=stonking"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.11.1-1build1","1.4.18-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libopen62541-1.4","binary_version":"1.4.18-1"},{"binary_name":"libopen62541-1.4-tools","binary_version":"1.4.18-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-116014.json"}},{"package":{"name":"open62541","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/open62541?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.11.1-1","1.4.11.1-1build1"],"ecosystem_specific":{"binaries":[{"binary_name":"libopen62541-1.4","binary_version":"1.4.11.1-1build1"},{"binary_version":"1.4.11.1-1build1","binary_name":"libopen62541-1.4-tools"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-116014.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}