{"schemaVersion":3,"id":"CVE-2026-71968","aliases":["UBUNTU-CVE-2026-71968","DEBIAN-CVE-2026-71968"],"status":"published","duplicateOf":null,"title":null,"description":"OP-TEE OS through 4.10.0, fixed in commit 8794043, contains a use-after-free vulnerability in the Trusted Application loader that allows attackers with the ability to load a signed Trusted Application to corrupt secure-world kernel memory by setting the TA_FLAG_CONCURRENT flag in a user TA signed header. 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Any operations using the original pointer are no longer valid because the memory \"belongs\" to the code that operates on the new pointer.","type":"weakness","status":"Stable","abstraction":"Variant","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/416.html"}],"affected":[{"vendor":"debian","product":"optee-os","name":"optee-os","label":"optee-os","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/optee-os","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"optee-os","name":"optee-os","label":"optee-os","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/optee-os","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"op-tee","product":"optee_os","name":"optee_os","label":"optee_os","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≤ 4.10.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"≤ 4.10.0","eol":null,"hubHref":"/vendor/op-tee/optee_os"}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/OP-TEE/optee_os/pull/7900","label":"github.com/OP-TEE/optee_os/pull/7900","hostname":"github.com","tags":["Issue Tracking","REPORT"]},{"url":"https://github.com/OP-TEE/optee_os/commit/8794043c4065c26a2b8b1313794ba5ba5f06d296","label":"github.com/OP-TEE/optee_os/commit/8794043c4065c26a2b8b1313794ba5ba5f06d296","hostname":"github.com","tags":["Patch","REPORT"]},{"url":"https://www.vulncheck.com/advisories/op-tee-os-use-after-free-via-trusted-application-loader-ta-flag-concurrent","label":"www.vulncheck.com/advisories/…","hostname":"www.vulncheck.com","tags":["Third Party Advisory","REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-71968","label":"ubuntu.com/security/CVE-2026-71968","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-71968","label":"www.cve.org/CVERecord?id=CVE-2026-71968","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-71968","label":"security-tracker.debian.org/tracker/CVE-2026-71968","hostname":"security-tracker.debian.org","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-08-10T18:15:10.619Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-08-17T18:18:07.921Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":34,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T21:21:07.418Z","stale":false,"partial":false}}