{"id":"UBUNTU-CVE-2026-67855","details":"open62541 contains a heap use-after-free in the GDS PushManagement certificate update workflow when UA_ENABLE_GDS_PUSHMANAGEMENT is enabled. This allows a remote attacker to cause a denial of service.","modified":"2026-08-06T22:15:42.580319180Z","published":"2026-08-04T22:17:00Z","upstream":["CVE-2026-67855"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-67855"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-67855"},{"type":"REPORT","url":"https://github.com/open62541/open62541/issues/8093"},{"type":"REPORT","url":"https://github.com/open62541/open62541"},{"type":"REPORT","url":"https://github.com/open62541/open62541/blob/master/arch/posix/eventloop_posix.c"},{"type":"REPORT","url":"https://github.com/open62541/open62541/blob/master/examples/encryption/server_encryption.c"},{"type":"REPORT","url":"https://github.com/open62541/open62541/blob/master/src/server/ua_server_internal.h"},{"type":"REPORT","url":"https://github.com/open62541/open62541/blob/master/src/server/ua_server_ns0_gds.c"}],"affected":[{"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-2026-67855.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}