{"cve":"CVE-2025-24371","nvd":{"published":"2025-02-03T22:15:28.460","modified":"2026-06-17T08:58:55.260","status":"Deferred","description":"CometBFT is a distributed, Byzantine fault-tolerant, deterministic state machine replication engine. In the `blocksync` protocol peers send their `base` and `latest` heights when they connect to a new node (`A`), which is syncing to the tip of a network. `base` acts as a lower ground and informs `A` that the peer only has blocks starting from height `base`. `latest` height informs `A` about the latest block in a network. Normally, nodes would only report increasing heights. If `B` fails to provide the latest block, `B` is removed and the `latest` height (target height) is recalculated based on other nodes `latest` heights. The existing code however doesn't check for the case where `B` first reports `latest` height `X` and immediately after height `Y`, where `X > Y`. `A` will be trying to catch up to 2000 indefinitely. This condition requires the introduction of malicious code in the full node first reporting some non-existing `latest` height, then reporting lower `latest` height and nodes which are syncing using `blocksync` protocol. This issue has been patched in versions 1.0.1 and 0.38.17 and all users are advised to upgrade. Operators may attempt to ban malicious peers from the network as a workaround.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":7.1},"cvss_v3":null,"cwes":["CWE-703"],"references":["https://github.com/cometbft/cometbft/releases/tag/v0.38.17","https://github.com/cometbft/cometbft/releases/tag/v1.0.1","https://github.com/cometbft/cometbft/security/advisories/GHSA-22qq-3xwm-r5x4"],"products":[],"source":"nvd","synced_at":"2026-10-19T21:58:41.599736885+00:00"},"epss":{"cve":"CVE-2025-24371","score":0.00464,"percentile":0.40221,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-22qq-3xwm-r5x4","url":"https://osv.dev/vulnerability/GHSA-22qq-3xwm-r5x4","summary":"CometBFT allows a malicious peer to make node stuck in blocksync","modified":"2026-03-09T21:01:24.977770Z","packages":[{"ecosystem":"Go","name":"github.com/cometbft/cometbft","purl":"pkg:golang/github.com/cometbft/cometbft","ranges":[">=1.0.0-alpha.1 <1.0.1"],"fixed":["1.0.1"]},{"ecosystem":"Go","name":"github.com/cometbft/cometbft","purl":"pkg:golang/github.com/cometbft/cometbft","ranges":["<0.38.17"],"fixed":["0.38.17"]}]},{"id":"GO-2025-3442","url":"https://osv.dev/vulnerability/GO-2025-3442","summary":"CometBFT allows a malicious peer to make node stuck in blocksync in github.com/cometbft/cometbft","modified":"2025-11-18T15:33:53Z","packages":[{"ecosystem":"Go","name":"github.com/cometbft/cometbft","purl":"pkg:golang/github.com/cometbft/cometbft","ranges":["<0.38.17"],"fixed":["0.38.17"]},{"ecosystem":"Go","name":"github.com/cometbft/cometbft","purl":"pkg:golang/github.com/cometbft/cometbft","ranges":["<1.0.1"],"fixed":["1.0.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}