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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 the BLOCK message, 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 -maxmempool option 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 -maxmempool setting 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

dog - 04:02:41 up 90 days, 12:34, 8 users, load average: 0.00, 0.00, 0.00

[19/12/2025 00:30] A cassação de Eduardo Bolsonaro e do deputado foragido - O Assunto #1624 - G1

[18/12/2025 13:00] Lula afirma que vai vetar PL da Dosimetria - Agência Brasil

[18/12/2025 15:26] Mendonça determina prisão de 16 investigados em caso de fraude no INSS - Migalhas

[17/12/2025 19:46] Ações do MEC são apresentadas durante reunião ministerial — Ministério da Educação - GOV.BR

[18/12/2025 19:08] Bolsonaro vai depor à PF sobre origem de objetos e documentos encontrados em cofres no Alvorada - Estadão

[18/12/2025 12:06] STF - Reforma da previdência e regras para aposentadoria especial - sessão de 18/12/2025 - JOTA Info

[19/12/2025 00:01] Verão começa neste fim de semana; veja o que esperar da estação mais quente do ano - G1

[18/12/2025 16:12] Moraes autoriza Bolsonaro a conceder entrevista na prisão - CBN

[18/12/2025 08:15] Von der Leyen pede para países da UE aprovarem acordo com Mercosul - CNN Brasil

[18/12/2025 18:19] Consu aprova projeto de autarquização da área da saúde da Unicamp - Portal Unicamp

[CVE-2024-57152] [Modified: 11-09-2025] [Analyzed] [V3.1 S7.5:HIGH] Incorrect access control in the preHandle function of my-site v1.0.2 allows attackers to access sensitive components without authentication via the cn.luischen.interceptor.BaseInterceptor class

[CVE-2025-43746] [Modified: 12-12-2025] [Analyzed] [V3.1 S5.4:MEDIUM] A reflected cross-site scripting (XSS) vulnerability in the Liferay Portal 7.4.0 through 7.4.3.132, and Liferay DXP 2025.Q2.0 through 2025.Q2.2, 2025.Q1.0 through 2025.Q1.14, 2024.Q4.0 through 2024.Q4.7, 2024.Q3.0 through 2024.Q3.13, 2024.Q2.0 through 2024.Q2.13, 2024.Q1.1 through 2024.Q1.18 and 7.4 GA through update 92 allows a remote authenticated attacker to inject JavaScript code via _com_liferay_dynamic_data_mapping_web_portlet_DDMPortlet_portletNamespace and _com_liferay_dynamic_data_mapping_web_portlet_DDMPortlet_namespace parameter.

[CVE-2025-9240] [Modified: 31-10-2025] [Analyzed] [V3.1 S4.3:MEDIUM] A security flaw has been discovered in elunez eladmin up to 2.7. Affected by this issue is some unknown functionality of the file /auth/info. The manipulation results in information disclosure. The attack can be launched remotely. The exploit has been released to the public and may be exploited.

[CVE-2025-43757] [Modified: 12-12-2025] [Analyzed] [V3.1 S5.4:MEDIUM] A reflected cross-site scripting (XSS) vulnerability in the Liferay Portal 7.4.0 through 7.4.3.132, and Liferay DXP 2025.Q2.0 through 2025.Q2.2, 2025.Q1.0 through 2025.Q1.14, 2024.Q4.0 through 2024.Q4.7, 2024.Q3.1 through 2024.Q3.13, 2024.Q2.1 through 2024.Q2.13, 2024.Q1.1 through 2024.Q1.18 and 7.4 GA through update 92 allows a remote authenticated attacker to inject JavaScript code via _com_liferay_dynamic_data_mapping_web_portlet_DDMPortlet_definition parameter.

[CVE-2025-50902] [Modified: 09-10-2025] [Analyzed] [V3.1 S8.8:HIGH] Cross Site Request Forgery (CSRF) vulnerability in old-peanut Open-Shop (aka old-peanut/wechat_applet__open_source) thru 1.0.0 allows attackers to gain sensitive information via crafted HTTP Post message.

[CVE-2025-9241] [Modified: 31-10-2025] [Analyzed] [V3.1 S6.3:MEDIUM] A weakness has been identified in elunez eladmin up to 2.7. This affects the function exportUser. This manipulation causes csv injection. The attack may be initiated remotely. The exploit has been made available to the public and could be exploited.

[CVE-2025-9244] [Modified: 02-09-2025] [Analyzed] [V3.1 S6.3:MEDIUM] A security vulnerability has been detected in Linksys RE6250, RE6300, RE6350, RE6500, RE7000 and RE9000 1.0.013.001/1.0.04.001/1.0.04.002/1.1.05.003/1.2.07.001. This vulnerability affects the function addStaticRoute of the file /goform/addStaticRoute. Such manipulation of the argument staticRoute_IP_setting/staticRoute_Netmask_setting/staticRoute_Gateway_setting/staticRoute_Metric_setting/staticRoute_destType_setting leads to os command injection. The attack may be launched remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

[CVE-2025-9245] [Modified: 02-09-2025] [Analyzed] [V3.1 S8.8:HIGH] A vulnerability was detected in Linksys RE6250, RE6300, RE6350, RE6500, RE7000 and RE9000 1.0.013.001/1.0.04.001/1.0.04.002/1.1.05.003/1.2.07.001. This issue affects the function WPSSTAPINEnr of the file /goform/WPSSTAPINEnr. Performing manipulation of the argument ssid results in stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

[CVE-2025-9246] [Modified: 02-09-2025] [Analyzed] [V3.1 S8.8:HIGH] A flaw has been found in Linksys RE6250, RE6300, RE6350, RE6500, RE7000 and RE9000 1.0.013.001/1.0.04.001/1.0.04.002/1.1.05.003/1.2.07.001. Impacted is the function check_port_conflict of the file /goform/check_port_conflict. Executing manipulation of the argument single_port_rule/port_range_rule can lead to stack-based buffer overflow. The attack can be executed remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

[CVE-2025-9247] [Modified: 02-09-2025] [Analyzed] [V3.1 S8.8:HIGH] A vulnerability has been found in Linksys RE6250, RE6300, RE6350, RE6500, RE7000 and RE9000 1.0.013.001/1.0.04.001/1.0.04.002/1.1.05.003/1.2.07.001. The affected element is the function setVlan of the file /goform/setVlan. The manipulation of the argument vlan_set leads to stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

[CVE-2025-9248] [Modified: 02-09-2025] [Analyzed] [V3.1 S8.8:HIGH] A vulnerability was found in Linksys RE6250, RE6300, RE6350, RE6500, RE7000 and RE9000 1.0.013.001/1.0.04.001/1.0.04.002/1.1.05.003/1.2.07.001. The impacted element is the function RP_pingGatewayByBBS of the file /goform/RP_pingGatewayByBBS. The manipulation of the argument ssidhex results in stack-based buffer overflow. The attack may be performed from a remote location. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.

[CVE-2025-9249] [Modified: 02-09-2025] [Analyzed] [V3.1 S8.8:HIGH] A vulnerability was determined in Linksys RE6250, RE6300, RE6350, RE6500, RE7000 and RE9000 1.0.013.001/1.0.04.001/1.0.04.002/1.1.05.003/1.2.07.001. This affects the function DHCPReserveAddGroup of the file /goform/DHCPReserveAddGroup. This manipulation of the argument enable_group/name_group/ip_group/mac_group causes stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.

[CVE-2025-57749] [Modified: 03-09-2025] [Analyzed] [V3.1 S6.5:MEDIUM] n8n is a workflow automation platform. Before 1.106.0, a symlink traversal vulnerability was discovered in the Read/Write File node in n8n. While the node attempts to restrict access to sensitive directories and files, it does not properly account for symbolic links (symlinks). An attacker with the ability to create symlinks—such as by using the Execute Command node—could exploit this to bypass the intended directory restrictions and read from or write to otherwise inaccessible paths. Users of n8n.cloud are not impacted. Affected users should update to version 1.106.0 or later.

[CVE-2025-9250] [Modified: 02-09-2025] [Analyzed] [V3.1 S8.8:HIGH] A vulnerability was identified in Linksys RE6250, RE6300, RE6350, RE6500, RE7000 and RE9000 1.0.013.001/1.0.04.001/1.0.04.002/1.1.05.003/1.2.07.001. This impacts the function setPWDbyBBS of the file /goform/setPWDbyBBS. Such manipulation of the argument hint leads to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.

[CVE-2025-9251] [Modified: 02-09-2025] [Analyzed] [V3.1 S8.8:HIGH] A security flaw has been discovered in Linksys RE6250, RE6300, RE6350, RE6500, RE7000 and RE9000 1.0.013.001/1.0.04.001/1.0.04.002/1.1.05.003/1.2.07.001. Affected is the function sta_wps_pin of the file /goform/sta_wps_pin. Performing manipulation of the argument Ssid results in stack-based buffer overflow. The attack can be initiated remotely. The exploit has been released to the public and may be exploited. The vendor was contacted early about this disclosure but did not respond in any way.

[CVE-2025-9252] [Modified: 02-09-2025] [Analyzed] [V3.1 S8.8:HIGH] A weakness has been identified in Linksys RE6250, RE6300, RE6350, RE6500, RE7000 and RE9000 1.0.013.001/1.0.04.001/1.0.04.002/1.1.05.003/1.2.07.001. Affected by this vulnerability is the function DisablePasswordAlertRedirect of the file /goform/DisablePasswordAlertRedirect. Executing manipulation of the argument hint can lead to stack-based buffer overflow. The attack can be launched remotely. The exploit has been made available to the public and could be exploited. The vendor was contacted early about this disclosure but did not respond in any way.

[CVE-2025-9253] [Modified: 02-09-2025] [Analyzed] [V3.1 S8.8:HIGH] A security vulnerability has been detected in Linksys RE6250, RE6300, RE6350, RE6500, RE7000 and RE9000 1.0.013.001/1.0.04.001/1.0.04.002/1.1.05.003/1.2.07.001. Affected by this issue is the function RP_doSpecifySiteSurvey of the file /goform/RP_doSpecifySiteSurvey. The manipulation of the argument ssidhex leads to stack-based buffer overflow. The attack may be initiated remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

[CVE-2025-9262] [Modified: 12-09-2025] [Analyzed] [V3.1 S5.6:MEDIUM] A flaw has been found in wong2 mcp-cli 1.13.0. Affected is the function redirectToAuthorization of the file /src/oauth/provider.js of the component oAuth Handler. This manipulation causes os command injection. The attack may be initiated remotely. The attack is considered to have high complexity. The exploitability is told to be difficult. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

[CVE-2025-9263] [Modified: 11-09-2025] [Analyzed] [V3.1 S4.3:MEDIUM] A vulnerability has been found in Xuxueli xxl-job up to 3.1.1. Affected by this vulnerability is the function getJobsByGroup of the file /src/main/java/com/xxl/job/admin/controller/JobLogController.java. Such manipulation of the argument jobGroup leads to improper control of resource identifiers. The attack may be launched remotely. The exploit has been disclosed to the public and may be used.

[CVE-2025-9264] [Modified: 11-09-2025] [Analyzed] [V3.1 S5.4:MEDIUM] A vulnerability was found in Xuxueli xxl-job up to 3.1.1. Affected by this issue is the function remove of the file /src/main/java/com/xxl/job/admin/controller/JobInfoController.java of the component Jobs Handler. Performing manipulation of the argument ID results in improper control of resource identifiers. Remote exploitation of the attack is possible. The exploit has been made public and could be used.