# CVE-2026-33317

> Vulnerability · severity: **HIGH** (CVSS 8.7).

## Description

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. In versions 3.13.0 through 4.10.0, missing checks in `entry_get_attribute_value()`  in `ta/pkcs11/src/object.c` can lead to out-of-bounds read from the PKCS#11 TA heap or a crash. When chained with the OOB read, the PKCS#11 TA function `PKCS11_CMD_GET_ATTRIBUTE_VALUE`  or `entry_get_attribute_value()` can, with a bad template parameter, be tricked into reading at most 7 bytes beyond the end of the template buffer and writing beyond the end of the template buffer with the content of an attribute value of a PKCS#11 object. Commits e031c4e562023fd9f199e39fd2e85797e4cbdca9, 16926d5a46934c46e6656246b4fc18385a246900, and 149e8d7ecc4ef8bb00ab4a37fd2ccede6d79e1ca contain patches and are anticipated to be part of version 4.11.0.

## Key facts

- **CVE ID:** CVE-2026-33317
- **Published:** 2026-04-24
- **CVSS severity:** HIGH
- **CVSS base score:** 8.7
- **CWE codes:** CWE-125, CWE-787

## Affected products

- `linaro:op-tee`

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-33317

## Citation

> AI Analytics. CVE-2026-33317. Retrieved 2026-07-23 from https://api.ai-analytics.org/cve/CVE-2026-33317. Derived from NIST NVD. Licensed CC0.

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