chuva fraca
- [USD] USD 87,664.11
- [BRL] BRL 473,026.80 [USD] USD 87,664.11 [GBP] GBP 66,975.03 [EUR] EUR 76,124.97
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
[24/11/2025 11:37] STF tem unanimidade para manter a prisão preventiva de Bolsonaro - Poder360
[24/11/2025 08:10] Com dificuldades para aprovação ao STF, Messias envia carta a Alcolumbre - Revista Oeste
[24/11/2025 05:02] Só a busca por blindagem une o bolsonarismo e o Centrão - Valor Econômico
[24/11/2025 14:04] Quem era o piloto que morreu após acidente em show radical do Beto Carrero World - NSC Total
[24/11/2025 12:49] Quem era a estudante Catarina Kasten, assassinada em trilha de praia em SC - CNN Brasil
[24/11/2025 06:33] Governo Trump inclui Cartel de los Soles, que diz ser liderado por Nicolás Maduro, em lista de grupos terroristas - G1
[24/11/2025 11:29] 'Terminou com um soluço', diz The Economist sobre a COP30; veja repercussão internacional - Valor Econômico
[24/11/2025 08:52] Governo do RJ inicia Operação Barricada Zero - O Antagonista
[24/11/2025 12:55] Motta rompe com líder do PT e agrava desgaste na relação da Câmara com governo Lula - Folha de S.Paulo
[24/11/2025 07:21] Cidade tem mais de 5 mil casas atingidas por granizo e entra em emergência - MetSul Meteorologia