CVE-2026-33317
HIGHCVSS v3.1: 8.7 · EPSS: 0.0001 (3.2 percentile)
Source data as of:
At a glance
- Severity
- HIGH
- CVSS
- 8.7 v3.1 · NVD
- EPSS
- 0.0001 (3.2 percentile) · FIRST.org
- CISA KEV
- No
- Type
- Out-of-bounds Read, Out-of-bounds Write · NVD CWE
- Attack conditions (CVSS vector)
- No user interaction · Source: NVD Vector
- Affected vendors
- trustedfirmware
- Published
- 2026-04-24 · Modified: 2026-06-05
- References
- Jump to references (4)
CVSS / EPSS / KEV
Source — CVSS: NVD · EPSS: FIRST.org · KEV: CISA. Data & Sources
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.
References
Reference URLs as listed by NVD, grouped by a mechanical match on the link's host/pattern. Labels describe the link type only.
- Patch https://github.com/OP-TEE/optee_os/commit/149e8d7ecc4ef8bb00ab4a37fd2ccede6d79e1ca
- Patch https://github.com/OP-TEE/optee_os/commit/16926d5a46934c46e6656246b4fc18385a246900
- Patch https://github.com/OP-TEE/optee_os/commit/e031c4e562023fd9f199e39fd2e85797e4cbdca9
- Vendor advisory https://github.com/OP-TEE/optee_os/security/advisories/GHSA-8cqw-mg7v-c9p9