{"id":"CVE-2026-71968","title":"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 memor…","summary":"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 memor…","severity":"medium","cvss":6.7,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-362","CWE-416"],"published":"2026-08-10","updated":"2026-09-24","sourceUpdated":"2026-09-24T20:05:09.813","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-71968","references":[{"url":"https://github.com/OP-TEE/optee_os/commit/8794043c4065c26a2b8b1313794ba5ba5f06d296","label":"disclosure@vulncheck.com"},{"url":"https://github.com/OP-TEE/optee_os/pull/7900","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/op-tee-os-use-after-free-via-trusted-application-loader-ta-flag-concurrent","label":"disclosure@vulncheck.com"}],"tags":["nvd"],"epss":0.00136,"epssPercentile":0.02433,"ingestedAt":"2026-09-24T20:51:40.188Z","slug":"CVE-2026-71968","body":"## Overview\n\nOP-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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":37,"depthScoreParts":{"impact":36.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}