{"affected":[{"defaultStatus":"affected","ecosystem":"github","packageName":"OP-TEE/optee_os","product":"optee_os","source":"CNA: VulnCheck","vendor":"OP-TEE","versions":[{"lessThanOrEqual":"4.10.0","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"8794043c4065c26a2b8b1313794ba5ba5f06d296","versionType":"git"}]}],"cveId":"CVE-2026-71968","cwes":["CWE-416","CWE-362"],"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. Attackers can cause two concurrent sessions to operate on the same shared context without locking, corrupting the uctx->vm_info.regions list during memref parameter mapping and unmapping to free vm_region nodes still in use, resulting in a use-after-free in S-EL1 secure-world kernel memory.","epss":{"date":"2026-11-08","percentile":0.03036,"score":0.00136},"exploits":[],"kev":null,"metrics":[{"score":8.4,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"},{"score":6.7,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}],"modifiedAt":1794146916680,"publishedAt":1786385710619,"references":[{"source":"CNA: VulnCheck","tags":["issue-tracking","patch"],"url":"https://github.com/OP-TEE/optee_os/pull/7900"},{"source":"CNA: VulnCheck","tags":["patch"],"url":"https://github.com/OP-TEE/optee_os/commit/8794043c4065c26a2b8b1313794ba5ba5f06d296"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/op-tee-os-use-after-free-via-trusted-application-loader-ta-flag-concurrent"}],"remediation":[{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/OP-TEE/optee_os/pull/7900"},{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/OP-TEE/optee_os/commit/8794043c4065c26a2b8b1313794ba5ba5f06d296"}],"revision":"d7d4587aea498c57c7273491c04f12403525af1113db4a33d3958e0783e50a21","sources":[{"modifiedAt":1794146916680,"name":"CNA: VulnCheck","retrievedAt":1794151329260,"url":"https://www.cve.org/CVERecord?id=CVE-2026-71968"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794151337731,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-71968"}],"ssvc":{"assessedAt":1786986503092,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"total"},"status":"published","title":"OP-TEE OS 4.10.0 Use-After-Free via Trusted Application Loader TA_FLAG_CONCURRENT","updatedAt":1794151337731}