GHSA-XQMP-FXGV-XVQ5 libp2p-gossipsub: Remote crash via unchecked Instant overflow in heartbeat backoff expiry handling

Description Summary The Rust libp2p Gossipsub implementation contains a remotely reachable panic in backoff expiry handling. After a peer sends a crafted PRUNE control message with an attacker-controlled, near-maximum backoff value, the value is accepted and stored as an Instant near the...