VULNERABILITY INTELLIGENCE

CVE-2021-34387

CVSS score6.3 MEDIUM
EPSS probability0.21%
CISA KEVNot currently listed
Published2021-06-21
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H

Description

The ARM TrustZone Technology on which Trusty is based on contains a vulnerability in access permission settings where the portion of the DRAM reserved for TrustZone is identity-mapped by TLK with read, write, and execute permissions, which gives write access to kernel code and data that is otherwise mapped read only.

Weakness classification

  • nvd@nist.gov: CWE-276

Primary references