RUSTSEC-2026-0535

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Source

https://rustsec.org/advisories/RUSTSEC-2026-0535

Import Source

https://github.com/rustsec/advisory-db/blob/osv/crates/RUSTSEC-2026-0535.json

JSON Data

https://api.osv.dev/v1/vulns/RUSTSEC-2026-0535

Aliases

CVE-2026-33040
GHSA-gc42-3jg7-rxr2

Published

2026-03-18T12:00:00Z

Modified

2026-11-13T12:45:08Z

Summary

Remote panic from an oversized PRUNE backoff

Details

When a peer sent a PRUNE control message, the backoff it asked for was turned into an expiry time with Instant::now() + Duration::from_secs(backoff). That addition panics on overflow, so a peer that sends a PRUNE with a very large backoff, such as u64::MAX, crashes the node. No authentication is needed beyond an ordinary libp2p connection with the gossipsub protocol, and the attacker can repeat it after every restart.

The fix uses Instant::checked_add in BackoffStorage::update_backoff and ignores a backoff that would overflow. It is in 0.49.3.

Database specific

{
    "license": "CC0-1.0"
}

References

Affected packages

crates.io / libp2p-gossipsub

Package

Name: libp2p-gossipsub; View open source insights on deps.dev
Purl: pkg:cargo/libp2p-gossipsub

Affected ranges

Type: SEMVER
Events: Introduced

0.0.0-0

Fixed

0.49.3

Ecosystem specific

{
    "affected_functions": null,
    "affects": {
        "arch": [],
        "functions": [],
        "os": []
    }
}