{"id":"CVE-2026-45702","state":"PUBLISHED","title":"OP-TEE has FF-A type confusion in SPMC tmem path that causes S-EL1 kernel panic","description":"OP-TEE is a Trusted Execution Environment (TEE) designed as companion to a non-secure Linux kernel running on Arm; Cortex-A cores using the TrustZone technology. Starting in version 4.3.0 and prior to version 4.11.0, a type confusion vulnerability exists in OP-TEE OS when processing an FFA_MEM_SHARE request from the normal world. This only applies when OP-TEE is configured as an SPMC for S-EL0 SPs, that is, with `CFG_CORE_SEL1_SPMC=y` and `CFG_SECURE_PARTITION=y`. Version 4.11.0 fixes the issue.","publishedAt":"2026-06-03T17:55:18.331Z","updatedAt":"2026-06-04T12:54:26.407Z","severity":{"score":4.4,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["OP-TEE optee_os"],"affected":[{"vendor":"OP-TEE","product":"optee_os","versions":[{"version":">= 4.3.0, < 4.11.0","status":"affected"}]}],"references":["https://github.com/OP-TEE/optee_os/security/advisories/GHSA-86pj-8xgw-66p5"],"weaknesses":["CWE-843"],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/45xxx/CVE-2026-45702.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-45702","state":"PUBLISHED","datePublished":"2026-06-03T17:55:18.331Z","dateUpdated":"2026-06-04T12:54:26.407Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-05-13T04:38:01.165Z"},"containers":{"cna":{"title":"OP-TEE has FF-A type confusion in SPMC tmem path that causes S-EL1 kernel panic","descriptions":[{"lang":"en","value":"OP-TEE is a Trusted Execution Environment (TEE) designed as companion to a non-secure Linux kernel running on Arm; Cortex-A cores using the TrustZone technology. Starting in version 4.3.0 and prior to version 4.11.0, a type confusion vulnerability exists in OP-TEE OS when processing an FFA_MEM_SHARE request from the normal world. This only applies when OP-TEE is configured as an SPMC for S-EL0 SPs, that is, with `CFG_CORE_SEL1_SPMC=y` and `CFG_SECURE_PARTITION=y`. Version 4.11.0 fixes the issue."}],"affected":[{"vendor":"OP-TEE","product":"optee_os","versions":[{"version":">= 4.3.0, < 4.11.0","status":"affected"}]}],"references":[{"url":"https://github.com/OP-TEE/optee_os/security/advisories/GHSA-86pj-8xgw-66p5","name":"https://github.com/OP-TEE/optee_os/security/advisories/GHSA-86pj-8xgw-66p5","tags":["x_refsource_CONFIRM"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":4.4,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"HIGH","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-843","lang":"en","description":"CWE-843: Access of Resource Using Incompatible Type ('Type Confusion')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-06-03T17:55:18.331Z"},"source":{"advisory":"GHSA-86pj-8xgw-66p5","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-04T12:53:23.586093Z","id":"CVE-2026-45702","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":"2026-06-04T12:54:26.407Z"}}]}}}