CVE-2025-51677Public exploit

Debug data corruption via LSU synthesis mismatch

Published Jul 17, 2026 · Updated Jul 17, 2026

Hardware logic error in openRISC OR1200 commit 83ac6b allows context-dependent attackers to corrupt data returned to the Debug Unit. A synthesis mismatch in the Load-Store Unit makes the du_lsu_load_dat CPU output unknown instead of returning the requested 64-bit memory value during a debugging load. The condition requires a Debug Unit memory-load request and causes incorrect memory-state interpretation, preventing reliable processor diagnosis.

CVSS severityUnavailable
Unscored
EPSS probability0.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Hardware logic error in openRISC OR1200 commit 83ac6b allows context-dependent attackers to corrupt data returned to the Debug Unit. A synthesis mismatch in the Load-Store Unit makes the du_lsu_load_dat CPU output unknown instead of returning the requested 64-bit memory value during a debugging load. The condition requires a Debug Unit memory-load request and causes incorrect memory-state interpretation, preventing reliable processor diagnosis.

The record

CVE
CVE-2025-51677
Published
Jul 17, 2026
Updated
Jul 17, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Jul 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 17, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

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Technologies

Your stack

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Your stack

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