What’s Vulnerable › Vulnerabilities

CVE-2021-35465

• Severity: low (CVSS 3.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-08-23 · updated 2026-06-17

Description

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: all versions
• Arm Cortex-M33 Firmware: from r0p0 through r1p0
• Arm Cortex-M35P Firmware: r0
• Arm Cortex-M55 Firmware: from r0p0 through r1p0

References

• https://developer.arm.com/support/arm-security-updates
• https://developer.arm.com/support/arm-security-updates/vlldm-instruction-security-vulnerability
• https://developer.arm.com/support/arm-security-updates
• https://developer.arm.com/support/arm-security-updates/vlldm-instruction-security-vulnerability

Get alerted when CVE-2021-35465 or the next vulnerability affects your stack