---
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'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.