CVE-2021-35465: Arm China Star-MC1 Firmware

Low severity, CVSS 3.4. EPSS: 0.3% chance of exploitation in the next 30 days.

Certain Arm products before 2021-08-23 do not properly consider the effect of exceptions on a VLLDM instruction. A Non-secure handler may have read or write access to part of a Secure context. This affects Arm Cortex-M33 r0p0 through r1p0, Arm Cortex-M35P r0, Arm Cortex-M55 r0p0 through r1p0, and Arm China STAR-MC1 (in the STAR SE configuration).

Affected products

• Arm China Star-MC1 Firmware: affected versions not specified
• Arm Cortex-m33 Firmware: from r0p0, up to and including r1p0
• Arm Cortex-m35p Firmware: version r0 only
• Arm Cortex-m55 Firmware: from r0p0, up to and including r1p0

Published 2021-08-23. Last modified 2026-06-17.