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CVE-2026-71968— OP-TEE OS 4.10.0 Use-After-Free via Trusted Application Loader TA_FLAG_CONCURRENT

Quick assessment

Affected
OP-TEE optee_os
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OP-TEE Trusted OS是OP-TEE组织的一款可信执行环境操作系统。 OP-TEE Trusted OS 4.10.0及之前版本存在安全漏洞，该漏洞源于Trusted Application loader存在释放后重用问题，攻击者可通过设置TA_FLAG_CONCURRENT标志使并发会话无锁操作同一共享上下文，导致memref参数映射和取消映射过程中释放仍在使用的vm_region节点，破坏安全世界内核内存。

CVSS 6.7 · Medium EPSS 0.14% · P3

Possible ATT&CK Techniques 1 AI

T1612 · Build Image on Host

Affected Version Matrix 2

VendorProduct Version RangeStatus
OP-TEE optee_os ≤ 4.10.0 affected
8794043c4065c26a2b8b1313794ba5ba5f06d296 unaffected
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I. Basic Information for CVE-2026-71968

Vulnerability Information
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Vulnerability Title
OP-TEE OS 4.10.0 Use-After-Free via Trusted Application Loader TA_FLAG_CONCURRENT
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5
Vulnerability Title
OP-TEE Trusted OS 竞争条件问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OP-TEE Trusted OS是OP-TEE组织的一款可信执行环境操作系统。 OP-TEE Trusted OS 4.10.0及之前版本存在安全漏洞，该漏洞源于Trusted Application loader存在释放后重用问题，攻击者可通过设置TA_FLAG_CONCURRENT标志使并发会话无锁操作同一共享上下文，导致memref参数映射和取消映射过程中释放仍在使用的vm_region节点，破坏安全世界内核内存。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
OP-TEE optee_os 0 ~ 4.10.0 -

II. Public POCs for CVE-2026-71968

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III. Intelligence Information for CVE-2026-71968

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Patches & Fixes for CVE-2026-71968 (2)

Vendor Advisories for CVE-2026-71968 (1)

Same Patch Batch · OP-TEE · 2026-08-10 · 3 CVEs total

CVE-2026-71969 6.7 MEDIUM OP-TEE OS 4.10.0 Buffer Underwrite via RSA NOPAD Encrypt/Decrypt Operations
CVE-2026-71967 5.5 MEDIUM OP-TEE OS 4.10.0 NULL Pointer Dereference DoS via Widevine PTA open_session

IV. Related Vulnerabilities

Same product: optee_os
Same vendor: OP-TEE
Same weakness: CWE-416

V. Comments for CVE-2026-71968

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