Vulnerability Details CVE-2026-33317
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 2.3%
CVSS Severity
CVSS v3 Score 8.7
References
- https://github.com/OP-TEE/optee_os/commit/149e8d7ecc4ef8bb00ab4a37fd2ccede6d79e1ca
- https://github.com/OP-TEE/optee_os/commit/16926d5a46934c46e6656246b4fc18385a246900
- https://github.com/OP-TEE/optee_os/commit/e031c4e562023fd9f199e39fd2e85797e4cbdca9
- https://github.com/OP-TEE/optee_os/security/advisories/GHSA-8cqw-mg7v-c9p9
Products affected by CVE-2026-33317
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cpe:2.3:o:linaro:op-tee:3.13.0
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cpe:2.3:o:linaro:op-tee:3.14.0
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cpe:2.3:o:linaro:op-tee:3.15.0
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cpe:2.3:o:linaro:op-tee:3.20
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cpe:2.3:o:linaro:op-tee:3.20.0
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cpe:2.3:o:linaro:op-tee:3.21.0
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cpe:2.3:o:linaro:op-tee:3.22.0
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cpe:2.3:o:linaro:op-tee:4.0.0
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cpe:2.3:o:linaro:op-tee:4.1.0
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cpe:2.3:o:linaro:op-tee:4.10.0
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cpe:2.3:o:linaro:op-tee:4.2.0
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cpe:2.3:o:linaro:op-tee:4.3.0
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cpe:2.3:o:linaro:op-tee:4.4.0
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cpe:2.3:o:linaro:op-tee:4.5.0
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cpe:2.3:o:linaro:op-tee:4.6.0
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cpe:2.3:o:linaro:op-tee:4.7.0
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cpe:2.3:o:linaro:op-tee:4.8.0
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cpe:2.3:o:linaro:op-tee:4.9.0