CVE-2026-33317

HIGH EPSS 8.1%
Published Apr 24, 20262mo ago · Modified Jun 17, 20261w ago
8.7 CVSS 3.1
High
Find Similar
Published Apr 24, 2026 2mo ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
8.7
Exploitability
2.0
Impact
6.0
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Changed
Confidentiality High
Integrity High
Availability Low

Threat Intelligence

EPSS Exploit Probability
8.1% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 2

CWE-125 Out-of-bounds Read Memory Safety
CWE-787 Out-of-bounds Write Memory Safety

Affected Products 1

VendorProductVersionRange
trustedfirmwareop-tee*≥3.13.0  –  ≤4.10.0

References 4

  • github.com https://github.com/OP-TEE/optee_os/commit/149e8d7ecc4ef8bb00ab4a37fd2ccede6d79e1ca
    Patch
  • github.com https://github.com/OP-TEE/optee_os/commit/16926d5a46934c46e6656246b4fc18385a246900
    Patch
  • github.com https://github.com/OP-TEE/optee_os/commit/e031c4e562023fd9f199e39fd2e85797e4cbdca9
    Patch
  • github.com https://github.com/OP-TEE/optee_os/security/advisories/GHSA-8cqw-mg7v-c9p9
    ExploitPatchVendor Advisory

Remediation

  • github.com https://github.com/OP-TEE/optee_os/commit/149e8d7ecc4ef8bb00ab4a37fd2ccede6d79e1ca
    Patch
  • github.com https://github.com/OP-TEE/optee_os/commit/16926d5a46934c46e6656246b4fc18385a246900
    Patch
  • github.com https://github.com/OP-TEE/optee_os/commit/e031c4e562023fd9f199e39fd2e85797e4cbdca9
    Patch
  • github.com https://github.com/OP-TEE/optee_os/security/advisories/GHSA-8cqw-mg7v-c9p9
    ExploitPatchVendor Advisory