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Babylon Integer Overflow in Distribution Module CumulativeRewardRatio Calculation Leading to Chain HaltGHSA-869w-47c6-fq8q

Fix: babylonlabs-io/babylon@f0a29d6

GHSA-869w-47c6-fq8q is a remote code execution vulnerability in github.com/babylonlabs-io/babylon. A fix is available for github.com/babylonlabs-io/babylon — see the affected versions and patch details below.

Also known asGO-2025-3687
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of May 22, 2025 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

1 pkg affected
🐹github.com/babylonlabs-io/babylon

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.

Description

Summary

Minting large amount of tokens through ibc transfer and then depositing them in validator rewards pool (via DepositValidatorRewardsPool message) can lead to integer overflow panic when calculating cumulative_reward_ratio for the validator.

This calculation happens in x/epoching module EndBlocker, thus the panic will halt the chain.

Impact

Denial of Service - Due to panic in the EndBlocker Babylon Genesis will halt

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐹Gogithub.com/babylonlabs-io/babylonall versions1.1.0go get github.com/babylonlabs-io/babylon@v1.1.0

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/babylonlabs-io/babylon, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update github.com/babylonlabs-io/babylon to 1.1.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-869w-47c6-fq8q is resolved across your whole dependency graph.

  3. Workarounds

    Constrain what reaches the vulnerable code: limit the size and shape of untrusted input, isolate the affected component in a sandboxed or least-privileged process, and enable the platform's memory-safety mitigations (ASLR, stack protector, hardened allocator) so an out-of-bounds access is more likely to fail closed than to be exploitable.

Frequently Asked Questions

### Summary Minting large amount of tokens through ibc transfer and then depositing them in validator rewards pool (via `DepositValidatorRewardsPool` message) can lead to integer overflow panic when calculating `cumulative_reward_ratio` for the validator. This calculation happens in `x/epoching` module `EndBlocker`, thus the panic will halt the chain. ### Impact Denial of Service - Due to panic in the `EndBlocker` Babylon Genesis will halt
O3 Security · Impact-Aware SCA

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Babylon Integer Overflow in Distribution Module…