RISC Zero is a zero-knowledge verifiable general computing platform based on zk-STARKs and the RISC-V microarchitecture. In versions 2.0.2 and below of risc0-zkvm-platform, when the zkVM guest calls sys_read, the host is able to use a crafted response to write to an arbitrary memory location in the guest. This capability can be leveraged to execute arbitrary code within the guest. As sys_read is the mechanism by which input is requested by the guest, all guest programs built with the affected versions are vulnerable. This critically compromises the soundness guarantees of the guest program. Other affected packages include risc0-aggregation versions below 0.9, risc0-zkos-v1compat below 2.1.0, risc0-zkvm versions between 3.0.0-rc.1 and 3.0.1. This issue has been fixed in the following versions: risc0-zkvm-platform 2.1.0, risc0-zkos-v1compat 2.1.0, risc0-aggregation 0.9, and risc0-zkvm 2.3.2 and 3.0.3.

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00088.

Exploitation none

Automatable yes

Technical Impact total

Affected Vendors & Products

Vendors Products
Risc Zero Project
  • Risc Zero

No data.

No data.

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Vendors Products
Risc Zero Project
  • Risc Zero
Advisories
Source ID Title
EUVD EUVD EUVD-2025-32056 RISC Zero is a zero-knowledge verifiable general computing platform based on zk-STARKs and the RISC-V microarchitecture. In versions 2.0.2 and below of risc0-zkvm-platform, when the zkVM guest calls sys_read, the host is able to use a crafted response to write to an arbitrary memory location in the guest. This capability can be leveraged to execute arbitrary code within the guest. As sys_read is the mechanism by which input is requested by the guest, all guest programs built with the affected versions are vulnerable. This critically compromises the soundness guarantees of the guest program. Other affected packages include risc0-aggregation versions below 0.9, risc0-zkos-v1compat below 2.1.0, risc0-zkvm versions between 3.0.0-rc.1 and 3.0.1. This issue has been fixed in the following versions: risc0-zkvm-platform 2.1.0, risc0-zkos-v1compat 2.1.0, risc0-aggregation 0.9, and risc0-zkvm 2.3.2 and 3.0.3.
Github GHSA Github GHSA GHSA-jqq4-c7wq-36h7 risc0 vulnerable to arbitrary code execution in guest via memory safety failure in `sys_read`
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/risc0/risc0/commit/3f00e1fa0159599c1601e788021f2169d1f0a4dc cve-icon cve-icon
https://github.com/risc0/risc0/pull/3351 cve-icon cve-icon
https://github.com/risc0/risc0/security/advisories/GHSA-jqq4-c7wq-36h7 cve-icon cve-icon
History

Thu, 02 Oct 2025 18:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Thu, 02 Oct 2025 09:00:00 +0000

Type Values Removed Values Added
First Time appeared Risc Zero Project
Risc Zero Project risc Zero
Vendors & Products Risc Zero Project
Risc Zero Project risc Zero

Wed, 01 Oct 2025 23:45:00 +0000

Type Values Removed Values Added
Description RISC Zero is a zero-knowledge verifiable general computing platform based on zk-STARKs and the RISC-V microarchitecture. In versions 2.0.2 and below of risc0-zkvm-platform, when the zkVM guest calls sys_read, the host is able to use a crafted response to write to an arbitrary memory location in the guest. This capability can be leveraged to execute arbitrary code within the guest. As sys_read is the mechanism by which input is requested by the guest, all guest programs built with the affected versions are vulnerable. This critically compromises the soundness guarantees of the guest program. Other affected packages include risc0-aggregation versions below 0.9, risc0-zkos-v1compat below 2.1.0, risc0-zkvm versions between 3.0.0-rc.1 and 3.0.1. This issue has been fixed in the following versions: risc0-zkvm-platform 2.1.0, risc0-zkos-v1compat 2.1.0, risc0-aggregation 0.9, and risc0-zkvm 2.3.2 and 3.0.3.
Title risc0 vulnerable to arbitrary code execution in guest via memory safety failure in `sys_read`
Weaknesses CWE-94
References
Metrics cvssV4_0

{'score': 9.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2025-10-02T18:01:05.528Z

Reserved: 2025-09-26T16:25:25.150Z

Link: CVE-2025-61588

cve-icon Vulnrichment

Updated: 2025-10-02T18:00:58.619Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-10-02T00:15:49.890

Modified: 2025-10-02T19:11:46.753

Link: CVE-2025-61588

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-10-02T08:38:15Z