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Advisory record · GHSA-jqq4-c7wq-36h7

risc0 vulnerable to arbitrary code execution in guest via memory safety failure in `sys_read`

CVSS 9.3 CriticalCriticalEPSS 0.0046 · 40th percentile

Critical, because:

  • CVSS score 9.3: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 1 Oct 2025, 21:04 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
risc0-zkvm-platformcrates.io<2.1.02.1.0
risc0-zkos-v1compatcrates.io<2.1.02.1.0
risc0-aggregationcrates.io<0.90.9
risc0-zkvmcrates.io<2.3.2 || >=3.0.0, <3.0.32.3.2, 3.0.3
Identifiers
GHSA-jqq4-c7wq-36h7 · CVE-2025-61588
Weakness (CWE)
CWE-94
Tags
Published
1 Oct 2025
Updated
10 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Affected versions of risc0-zkvm-platform before 2.1.0, risc0-zkos-v1compat before 2.1.0, risc0-aggregation before 0.9, and risc0-zkvm before 2.3.2 or from 3.0.0 to before 3.0.3 contain a memory safety flaw in sys_read. A malicious host can send a crafted response that writes to an arbitrary guest memory location, allowing arbitrary code execution inside the guest. Upgrade risc0-zkvm to 2.3.2 or 3.0.3, risc0-zkvm-platform to 2.1.0 or later, and risc0-aggregation to 0.9, then rebuild guests and update their image IDs.

Written 8 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
9.3 Critical 4.0 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 CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0046, the 40th percentile, on 15 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 15:17 UTC First seen by agentprime
  2. 31 Oct 2026, 15:17 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.