CVE-2021-41614: An issue was discovered in the controller unit of the OpenRISC mor1kx processor

Routine

HIGH 7.8MITIGATE

CVE-2021-41614 is a high-severity flaw (CVSS 7.8) affecting mor1kx firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in the controller unit of the OpenRISC mor1kx processor. The read/write access permissions to the Exception Program Counter Register (EPCR) are not implemented correctly. User programs from an unauthorized privilege level can make read/write accesses to EPCR.

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 95%)
CISA exploited list	No
Weakness	CWE-276
Published	2023-04-18
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: openrisc

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-04-18 12:15 UTCPublished CVE record published
2026-06-17 04:08 UTCUpdated Record last modified

openrisc mor1kx firmware MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-41614?

mor1kx firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-41614 being exploited?

CVE-2021-41614 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-41614 affect?

CVE-2021-41614 affects mor1kx firmware. Severity is high (CVSS 7.8). An issue was discovered in the controller unit of the OpenRISC mor1kx processor. The read/write access permissions to the Exception Program Counter Register (EPCR) are not implemented correctly. User programs from an unauthorized privilege

How urgent is CVE-2021-41614?

Priority 29/100. High severity

Related CVEs

CVE-2021-41613 MEDIUM 4.3 UPGRADE An issue was discovered in the controller unit of the OpenRISC mor1kx processor
CVE-2021-41612 HIGH 8.8 UPGRADE An issue was discovered in the ALU unit of the OpenRISC mor1kx processor

References

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