PT-2026-34837 · Op Tee · Optee Os

Published 2026-04-24 · Updated 2026-04-24 · CVE-2026-33317

NVD

CVSS v3.1

8.7

High

AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L

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.

Fix

Out of bounds Read

Memory Corruption

Weakness Enumeration

CWE-125

CWE-787

Related Identifiers

CVE-2026-33317

Affected Products

Optee Os

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-33317 · Security Note
• https://github.com/OP-TEE/optee_os/commit/149e8d7ecc4ef8bb00ab4a37fd2ccede6d79e1ca · Note
• https://github.com/OP-TEE/optee_os/commit/16926d5a46934c46e6656246b4fc18385a246900 · Note
• https://github.com/OP-TEE/optee_os/commit/e031c4e562023fd9f199e39fd2e85797e4cbdca9 · Note
• https://github.com/OP-TEE/optee_os/security/advisories/GHSA-8cqw-mg7v-c9p9 · Note