# Slow unbounded memory growth on paused pre-BIP31 peers

Slow unbounded memory growth on paused pre-BIP31 peers by . Bitcoin Core queues announcements for all peers, including paused ones. Pre-BIP31 peers could stay paused forever and let the queue grow unboundedly. A fix for this issue was released in Bitcoin Core versions 29.5, 30.4, 31.2 and 32.1. This issue is considered Medium severity and easily discoverable. Details Bitcoin Core implements backpressure for slow to read peers. Once the queue of messages to send a peer grows past a certain limit, it will mark that peer as paused for send purposes. However, it will still add some announcements t

https://bitcoincore.org/en/2026/10/28/disclose-fpausesend-oom/

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Canonical URL: https://qwibbit.com/q31440

Created: 2026-10-28T20:44:16.475943+00:00

Last edited: 2026-10-28T20:44:16.475943+00:00

Board: 3

Origin: Syndicated

Original source: https://bitcoincore.org/en/2026/10/28/disclose-fpausesend-oom/