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CVE-2021-35465

3.4 · LOW

Certain Arm products before 2021-08-23 do not properly consider the effect of exceptions on a VLLDM instruction.

Published Aug 23, 2021EPSS 0.30%

Overview

CVE-2021-35465 is a low-severity vulnerability. It was published on August 23, 2021 and has a CVSS 3.1 base score of 3.4 (LOW).

This vulnerability has a CVSS 3.1 base score of 3.4, rated LOW. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical 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).

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refdeveloper.arm.com/support/arm-security-updatesRefdeveloper.arm.com/support/arm-security-updates/vlldm-instruction-security-vulnerabilityRefdeveloper.arm.com/support/arm-security-updatesRefdeveloper.arm.com/support/arm-security-updates/vlldm-instruction-security-vulnerability

How CyberStrike helps

Frequently asked questions

What is CVE-2021-35465?

CVE-2021-35465 is a low-severity vulnerability. It was published on August 23, 2021 and has a CVSS 3.1 base score of 3.4 (LOW).

How severe is CVE-2021-35465?

This vulnerability has a CVSS 3.1 base score of 3.4, rated LOW. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2021-35465?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-35465?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-35465 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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