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CVE-2021-40507

9.8 · CRITICAL

An issue was discovered in the ALU unit of the OR1200 (aka OpenRISC 1200) processor 2011-09-10 through 2015-11-11.

Published Apr 18, 2023CWE-287EPSS 0.73%

Overview

CVE-2021-40507 is a critical-severity vulnerability. It was published on April 18, 2023 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

An issue was discovered in the ALU unit of the OR1200 (aka OpenRISC 1200) processor 2011-09-10 through 2015-11-11. The overflow flag is not being updated correctly for the subtract instruction, which results in an incorrect value in the overflow flag. Any software that relies on this flag may experience corruption in execution.

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

GitHubgithub.com/openrisc/or1200/commit/2c0765d7ba12813df273cd693a99c4e744f0fbd5Refseth.engr.tamu.edu/software-releases/thehuzz/GitHubgithub.com/openrisc/or1200/commit/2c0765d7ba12813df273cd693a99c4e744f0fbd5Refseth.engr.tamu.edu/software-releases/thehuzz/

How CyberStrike helps

Frequently asked questions

What is CVE-2021-40507?

CVE-2021-40507 is a critical-severity vulnerability. It was published on April 18, 2023 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2021-40507?

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2021-40507?

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-2021-40507?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-40507 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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