What’s Vulnerable › Vulnerabilities

CVE-2021-41612

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-04-18 · updated 2026-06-17

Description

An issue was discovered in the ALU unit of the OpenRISC mor1kx processor. The carry flag is not being updated correctly for the subtract instruction, which results in an incorrect value of the carry flag. Any software that relies on this flag may experience corruption in execution.

Affected products

• Openrisc Mor1Kx Firmware: before 5.1 — fixed in 5.1

How to fix

Upgrade to a fixed version: Openrisc Mor1Kx Firmware 5.1. Check the vendor advisory for mitigations.

References

• https://github.com/openrisc/mor1kx/issues/139
• https://seth.engr.tamu.edu/software-releases/thehuzz/
• https://github.com/openrisc/mor1kx/issues/139
• https://seth.engr.tamu.edu/software-releases/thehuzz/

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