CVE-2026-40290

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{"affected": [{"affectedData": [{"product": "optee_os", "vendor": "OP-TEE", "versions": [{"status": "affected", "version": ">= 3.16.0, < 4.11.0"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:trustedfirmware:op-tee:*:*:*:*:*:*:*:*", "matchCriteriaId": "524C2815-ED30-481B-BD34-E6A09099AD84", "versionEndIncluding": "4.10.0", "versionStartIncluding": "3.16.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "OP-TEE is a Trusted Execution Environment (TEE) designed as companion to a non-secure Linux kernel running on Arm; Cortex-A cores using the TrustZone technology. Starting in version 3.16.0 and prior to 4.11.0, a user-after-free (UAF) race condition exists in the shared memory teardown logic of FF-A within OP-TEE SPMC/SP flows. This only applies when OP-TEE is configured as an SPMC for S-EL0 SPs, that is, with `CFG_SECURE_PARTITION=y`. The function `sp_mem_remove()`, responsible for freeing entries in `smem->receivers` and `smem->regions`, fails to acquire the global `sp_mem_lock` before performing the `free()` operations. Concurrently, other code paths, such as `sp_mem_get_receiver()`, iterate over these same lists without holding a lock, or, like `sp_mem_is_shared()`, iterate while holding the lock but are not serialized against the unprotected `free()` in `sp_mem_remove()`. This creates a cross-thread race where a thread iterating the list can acquire a pointer to an entry (e.g., `struct sp_mem_map_region` or `struct sp_mem_receiver`), and then another thread calls `sp_mem_remove()`, freeing the object. When the first thread resumes and dereferences the pointer, it results in a Use-After-Free vulnerability. Version 4.11.0 fixes the issue."}, {"lang": "es", "value": "OP-TEE es un Entorno de Ejecuci\u00f3n Confiable (TEE) dise\u00f1ado como compa\u00f1ero de un kernel de Linux no seguro que se ejecuta en n\u00facleos Arm; Cortex-A utilizando la tecnolog\u00eda TrustZone. A partir de la versi\u00f3n 3.16.0 y antes de la 4.11.0, existe una condici\u00f3n de carrera de uso despu\u00e9s de liberaci\u00f3n (UAF) en la l\u00f3gica de desmantelamiento de memoria compartida de FF-A dentro de los flujos SPMC/SP de OP-TEE. Esto solo aplica cuando OP-TEE est\u00e1 configurado como un SPMC para SPs S-EL0, es decir, con 'CFG_SECURE_PARTITION=y'. La funci\u00f3n 'sp_mem_remove()', responsable de liberar entradas en 'smem->receivers' y 'smem->regions', no logra adquirir el 'sp_mem_lock' global antes de realizar las operaciones de 'free()'. Concurrentemente, otras rutas de c\u00f3digo, como 'sp_mem_get_receiver()', iteran sobre estas mismas listas sin mantener un bloqueo, o, como 'sp_mem_is_shared()', iteran mientras mantienen el bloqueo pero no est\u00e1n serializadas contra el 'free()' desprotegido en 'sp_mem_remove()'. Esto crea una condici\u00f3n de carrera entre hilos donde un hilo que itera la lista puede adquirir un puntero a una entrada (p. ej., 'struct sp_mem_map_region' o 'struct sp_mem_receiver'), y luego otro hilo llama a 'sp_mem_remove()', liberando el objeto. Cuando el primer hilo se reanuda y desreferencia el puntero, resulta en una vulnerabilidad de uso despu\u00e9s de liberaci\u00f3n. La versi\u00f3n 4.11.0 corrige el problema."}], "id": "CVE-2026-40290", "lastModified": "2026-07-21T19:10:00.107", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-40290", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-06-04T14:17:15.528743Z", "version": "2.0.3"}}]}, "published": "2026-06-03T18:16:23.707", "references": [{"source": "security-advisories@github.com", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "url": "https://github.com/OP-TEE/optee_os/security/advisories/GHSA-332c-xr93-849m"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "url": "https://github.com/OP-TEE/optee_os/security/advisories/GHSA-332c-xr93-849m"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

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