CVE-2026-71968
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
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 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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| OP-TEE | optee_os | 0 <= 4.10.0 | affected |
| OP-TEE | optee_os | 8794043c4065c26a2b8b1313794ba5ba5f06d296 | unaffected |
Weaknesses
- CWE-416: Use After Free
- CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
References
- https://github.com/OP-TEE/optee_os/pull/7900
- https://github.com/OP-TEE/optee_os/commit/8794043c4065c26a2b8b1313794ba5ba5f06d296
- https://www.vulncheck.com/advisories/op-tee-os-use-after-free-via-trusted-application-loader-ta-flag-concurrent
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