nuvens quebradas
- [USD] USD 92,767.33
- [BRL] BRL 494,598.29 [USD] USD 92,767.33 [GBP] GBP 71,042.15 [EUR] EUR 80,531.32
Price index provided by blockchain.info. - Disclosure of the details of a bug on 32-bit systems which may, in a rare edge case, cause the node to crash when receiving a pathological block. This bug would be extremely hard to exploit. A fix was released on October 10th 2025 in Bitcoin Core v30.0.
This issue is considered Low severity.
Details
Before writing a block to disk, Bitcoin Core checks that its size is within a normal range. This check would overflow on 32-bit systems for blocks over 1GB, and make the node crash when writing it to disk. Such a block cannot be sent using theBLOCKmessage, but could in theory be sent as a compact block if the victim node has a non-default large mempool which already contains 1GB of transactions. This would require the victim to have set their-maxmempooloption to a value greater than 3GB, while 32-bit systems may have at most 4GiB of memory.
This issue was indirectly prevented by capping the maximum value of the-maxmempoolsetting on 32-bit systems.
Attribution
Pieter Wuille discovered this bug and disclosed it responsibly.
Antoine Poinsot proposed and implemented a covert mitigation.
Timeline
- 2025-04-24 - Pieter Wuille reports the issue
- 2025-05-16 - Antoine Poinsot opens PR #32530 with a covert fix
- 2025-06-26 - PR #32530 is merged into master
- 2025-09-04 - Version 29.1 is released with the fix
- 2025-10-10 - Version 30.0 is released with the fix
- 2025-10-24 - Public Disclosure
[19/11/2025 23:34] Quem vai sair em 'A fazenda 17'? Duda, Maria e Wallas estão na roça; vote na enquete - Extra online
[19/11/2025 23:45] Atuações do Fluminense: Lucho Acosta e Hércules são os melhores no clássico; dê suas notas - ge
[19/11/2025 19:36] Pix da gafe? Alemanha anuncia aporte de 1 bi de euros no TFFF - Capital Reset
[19/11/2025 20:33] Trecho de carro, voo comum e truque com passaporte: fuga de Ramagem para Miami foi cena de filme - R7
[19/11/2025 14:40] 'Fora da realidade do planeta': cientistas fazem dura crítica às negociações da COP30 - O Globo
[19/11/2025 18:56] Adversários reagem à briga de Renato Freitas no centro de Curitiba - Poder360
[19/11/2025 11:55] PL Antifacção de Derrite vai asfixiar a PF, afirma Haddad - Poder360
[19/11/2025 15:36] Governo Lula bate o martelo sobre ponto facultativo na sexta (21/11) - Metrópoles
[19/11/2025 18:31] Motorista confessa que armou bloqueio no Rodoanel e produziu falsa bomba, diz polícia - Estadão
[19/11/2025 14:37] Chanceler alemão quer ter uma "boa conversa" com Lula após fala sobre Belém - CNN Brasil