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CVE-2025-54873

15
FAUCET Score

CVE-2025-54873 affects RISC Zero's risc0-zkvm (versions 2.0.0-2.1.0) and risc0-circuit-rv32im/risc0-circuit-rv32im-sys (versions 2.0.0-2.0.4) packages. The vulnerability stems from improper handling of signed integer division, allowing multiple outputs for a single input, and underconstrained division by zero results. Rated with a CVSS score of 2.7 (Low), this issue has a network attack vector and low attack complexity, potentially leading to limited integrity and availability impacts. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
Risc0Risc0
>= 2.0.0, < 2.2.0CNA affected

CVSS Data

CVSS version used by this source: 4.0

2.7LOW

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
VS Confidentiality
NONE
VS Integrity
LOW
VS Availability
LOW
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
UNREPORTED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.37%
Probability of exploitation in next 30 days
EPSS Percentile
29.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0037 is in the 32nd percentile among its peer group of 61 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

rustpatch availablevia ghsa
Product: risc0-zkvmFixed in: 2.2.0
rustpatch availablevia ghsa
Product: risc0-circuit-rv32imFixed in: 3.0.0
rustpatch availablevia ghsa
Product: risc0-circuit-rv32im-sysFixed in: 3.0.0

Vendor Advisories (1)

rustGHSA-f6rc-24x4-ppxplow

RISC Zero Underconstrained Vulnerability: Division

Aug 5, 2025

References

github.com / risc0/risc0/pull/3235
github.com / risc0/risc0/security/advisories/GHSA-f6rc-24x4-ppxp
github.com / risc0/zirgen/pull/249