Fellipe Weno

fweno.onefour.com.br

Current Conditions

São Paulo
nuvens quebradas

17 ℃

94%

Temperatura

Umidade

Fonte: OpenWeatherMap. - 19:00:02

[USD] USD 73,860.40

[BRL] BRL 373,275.69 [USD] USD 73,860.40 [GBP] GBP 54,904.57 [EUR] EUR 63,326.95
Price index provided by blockchain.info.
After Bitcoin Core 0.14.0 and before Bitcoin Core 29.0, validating a specially-crafted block may cause the node to access previously freed memory.
During validation, necessary data required for checking inputs for each transaction is pre-calculated and cached. For specially crafted invalid blocks, it was possible for this data to be destroyed while it was still being accessed by a background validation thread. An attacker capable of mining a block with sufficient proof-of-work could have exploited this to crash victim nodes. Because of the nature of use-after-free bugs, it is possible that the crash could have been used for remote code execution, though constraints on the input (block) data make this unlikely.
This issue is considered High severity.

Details
By default, script validation for new blocks is dispatched to background threads via a vector of CScriptCheck functors. Each CScriptCheck holds a pointer to a PrecomputedTransactionData object which stores some data needed by each input in the transaction. Because it stores a pointer and not the data itself, care must be taken to ensure that the PrecomputedTransactionData outlives the CScriptCheck.
The script checks lifetime is enforced by an RAII class, CCheckQueueControl. However, the control is intantiated before the precomputed transaction data. Because local objects in C++ are destructed in reverse order of construction, this means the vector of PrecomputedTransactionData is destroyed before the CCheckQueueControl.
This is not an issue when the block is valid, as CCheckQueueControl::Wait() will be called before the function returns and the PrecomputedTransactionData gets destroyed. However, in case of an early return (when a separate check fails) a background script thread may read the precomputed transaction data after it was destroyed. An attacker could exploit this to crash victim nodes at the expense of a valid PoW at tip.

Attribution
Cory Fields (MIT DCI) discovered this vulnerability and responsibly disclosed it in a detailed report containing a proof of concept for reproduction and a proposed mitigation.

Timeline
- 2024-11-02 Cory Fields privately reports the bug
- 2024-11-06 Pieter Wuille pushes a covert fix to already open PR #31112 which works around the issue by removing the early returns
- 2024-12-03 PR #31112 is merged
- 2025-04-12 Bitcoin Core version 29.0 is released with a fix
- 2026-04-19 The last vulnerable Bitcoin Core version (28.x) goes end of life
- 2026-05-05 Public disclosure.

dog - 19:05:43 up 253 days, 3:37, 4 users, load average: 0.00, 0.00, 0.00

[30/05/2026 14:06] Aliado de Trump ironiza Lula após fala sobre PCC e CV: "Chora mais" - CNN Brasil

[30/05/2026 07:52] Por que a eleição deste domingo é decisiva para a esquerda na Colômbia — e o que está em jogo - CartaCapital

[30/05/2026 12:05] Até maio, pacote de bondades de Lula é o dobro do de Bolsonaro - Poder360

[30/05/2026 10:27] Painel de Bolsonaro no Paraguai expõe contrato do governo e vira crise na fronteira - Revista Fórum

[30/05/2026 11:13] Sobreviventes no Laos enfrentaram condições perigosas para sair de caverna - CNN Brasil

[30/05/2026 14:59] Cinco pessoas ficam feridas após tiros serem disparados em frente à Estação São Bento do Metrô - Estadão

[30/05/2026 14:01] Kassab admite que pode ser vice de Caiado: "Coloco-me à disposição" - Metrópoles

[30/05/2026 03:58] Caso Henry: perícia descarta acidente doméstico, Jairinho e Monique deixam plenário, e depoimento de Leniel avança a madrugada; veja destaques do quinto dia de julgamento - O Globo

[30/05/2026 14:13] Torcida organizada do Atlético-MG fará protesto contra Flávio - Poder360

[29/05/2026 16:06] Pacheco desiste de disputar governo de Minas e diz que vai sair da política - CartaCapital

[CVE-2025-51958] [Modified: 13-02-2026] [Analyzed] [V3.1 S9.8:CRITICAL] aelsantex runcommand 2014-04-01, a plugin for DokuWiki, allows unauthenticated attackers to execute arbitrary system commands via lib/plugins/runcommand/postaction.php.

[CVE-2026-25129] [Modified: 27-02-2026] [Analyzed] [V3.1 S6.7:MEDIUM] PsySH is a runtime developer console, interactive debugger, and REPL for PHP. Prior to versions 0.11.23 and 0.12.19, PsySH automatically loads and executes a `.psysh.php` file from the Current Working Directory (CWD) on startup. If an attacker can write to a directory that a victim later uses as their CWD when launching PsySH, the attacker can trigger arbitrary code execution in the victim's context. When the victim runs PsySH with elevated privileges (e.g., root), this results in local privilege escalation. This is a CWD configuration poisoning issue leading to arbitrary code execution in the victim user’s context. If a privileged user (e.g., root, a CI runner, or an ops/debug account) launches PsySH with CWD set to an attacker-writable directory containing a malicious `.psysh.php`, the attacker can execute commands with that privileged user’s permissions, resulting in local privilege escalation. Downstream consumers that embed PsySH inherit this risk. For example, Laravel Tinker (`php artisan tinker`) uses PsySH. If a privileged user runs Tinker while their shell is in an attacker-writable directory, the `.psysh.php` auto-load behavior can be abused in the same way to execute attacker-controlled code under the victim’s privileges. Versions 0.11.23 and 0.12.19 patch the issue.

[CVE-2026-25141] [Modified: 27-02-2026] [Analyzed] [V3.1 S9.8:CRITICAL] Orval generates type-safe JS clients (TypeScript) from any valid OpenAPI v3 or Swagger v2 specification. Versions starting with 7.19.0 and prior to 7.21.0 and 8.2.0 have an incomplete fix for CVE-2026-23947. While the jsStringEscape function properly handles single quotes ('), double quotes (") and so on, it is still possible to achieve code injection using only a limited set of characters that are currently not escaped. The vulnerability lies in the fact that the application can be forced to execute arbitrary JavaScript using characters such as []()!+. By using a technique known as JSFuck, an attacker can bypass the current sanitization logic and run arbitrary code without needing any alphanumeric characters or quotes. Version 7.21.0 and 8.2.0 contain an updated fix.

[CVE-2025-2668] [Modified: 05-02-2026] [Analyzed] [V3.1 S6.5:MEDIUM] IBM Db2 for Linux, UNIX and Windows (includes Db2 Connect Server) 11.5.0 - 11.5.9 is vulnerable to a denial of service as the server may crash when an authenticated user creates a specially crafted query.

[CVE-2025-36001] [Modified: 05-02-2026] [Analyzed] [V3.1 S6.5:MEDIUM] IBM Db2 for Linux, UNIX and Windows (includes Db2 Connect Server) 11.5.0 - 11.5.9 and 12.1.0 - 12.1.3 could allow an authenticated user to cause a denial of service using a specially crafted SQL statement including XML that performs uncontrolled recursion.

[CVE-2025-36009] [Modified: 11-02-2026] [Analyzed] [V3.1 S6.5:MEDIUM] IBM Db2 for Linux, UNIX and Windows (includes DB2 Connect Server) could allow an authenticated user to cause a denial of service due to excessive use of a global variable.

[CVE-2025-36070] [Modified: 05-02-2026] [Analyzed] [V3.1 S6.5:MEDIUM] IBM Db2 for Linux, UNIX and Windows (includes Db2 Connect Server) 11.5.0 - 11.5.9 and 12.1.0 - 12.1.3 is vulnerable to a denial of service as a trap may occur when selecting from certain types of tables.

[CVE-2025-36098] [Modified: 05-02-2026] [Analyzed] [V3.1 S6.5:MEDIUM] IBM Db2 for Linux, UNIX and Windows (includes Db2 Connect Server) 11.5.0 - 11.5.9 and 12.1.0 - 12.1.3 could allow an authenticated user to cause a denial of service due to improper allocation of resources.

[CVE-2025-36123] [Modified: 05-02-2026] [Analyzed] [V3.1 S6.2:MEDIUM] IBM Db2 for Linux, UNIX and Windows (includes DB2 Connect Server) 11.5.0 - 11.5.9 and 12.1.0 - 12.1.3 could allow a local user to cause a denial of service when copying large table containing XML data due to improper allocation of system resources.

[CVE-2025-36184] [Modified: 05-02-2026] [Analyzed] [V3.1 S7.2:HIGH] IBM Db2 for Linux, UNIX and Windows (includes Db2 Connect Server) 11.5.0 - 11.5.9 could allow an instance owner to execute malicious code that escalate their privileges to root due to execution of unnecessary privileges operated at a higher than minimum level.

[CVE-2025-36353] [Modified: 05-02-2026] [Analyzed] [V3.1 S6.2:MEDIUM] IBM Db2 for Linux, UNIX and Windows (includes Db2 Connect Server) 11.5.0 - 11.5.9 and 12.1.0 - 12.1.3 could allow a local user to cause a denial of service due to improper neutralization of special elements in data query logic.

[CVE-2025-36365] [Modified: 05-02-2026] [Analyzed] [V3.1 S6.8:MEDIUM] IBM Db2 for Linux, UNIX and Windows (includes Db2 Connect Server) 11.5.0 - 11.5.9 and 12.1.0 - 12.1.3 under specific configuration of cataloged remote storage aliases could allow an authenticated user to execute unauthorized commands due to an authorization bypass vulnerability using a user-controlled key.

[CVE-2025-36366] [Modified: 05-02-2026] [Analyzed] [V3.1 S6.5:MEDIUM] IBM Db2 for Linux, UNIX and Windows (includes Db2 Connect Server) could allow a user to cause a denial of service by executing a query that invokes the JSON_Object scalar function, which may trigger an unhandled exception leading to abnormal server termination.

[CVE-2025-36384] [Modified: 05-02-2026] [Analyzed] [V3.1 S8.4:HIGH] IBM Db2 for Windows 12.1.0 - 12.1.3 could allow a local user with filesystem access to escalate their privileges due to the use of an unquoted search path element.

[CVE-2025-36387] [Modified: 05-02-2026] [Analyzed] [V3.1 S6.5:MEDIUM] IBM Db2 for Linux, UNIX and Windows (includes DB2 Connect Server) 11.5.0 - 11.5.9 could allow an authenticated user to cause a denial of service when given specially crafted query.

[CVE-2025-36423] [Modified: 05-02-2026] [Analyzed] [V3.1 S6.5:MEDIUM] IBM Db2 for Linux, UNIX and Windows (includes Db2 Connect Server) 12.1.0 - 12.1.3 could allow a local user to cause a denial of service due to improper neutralization of special elements in data query logic.

[CVE-2025-36424] [Modified: 11-02-2026] [Analyzed] [V3.1 S6.5:MEDIUM] IBM Db2 for Linux, UNIX and Windows (includes Db2 Connect Server) could allow a user to cause a denial of service due to improper neutralization of special elements in data query logic.

[CVE-2025-36427] [Modified: 11-02-2026] [Analyzed] [V3.1 S6.5:MEDIUM] IBM Db2 for Linux, UNIX and Windows (includes Db2 Connect Server) could allow a user to cause a denial of service due to insufficient validation of special elements in data query logic.

[CVE-2025-36428] [Modified: 05-02-2026] [Analyzed] [V3.1 S5.3:MEDIUM] IBM Db2 for Linux, UNIX and Windows (includes Db2 Connect Server) 11.5.0 - 11.5.9 and 12.1.0 - 12.1.3 could allow an authenticated user to cause a denial of service due to improper neutralization of special elements in data query logic when the RPSCAN feature is enabled.

[CVE-2025-36442] [Modified: 05-02-2026] [Analyzed] [V3.1 S6.5:MEDIUM] IBM Db2 for Linux, UNIX and Windows (includes Db2 Connect Server) 11.5.0 - 11.5.9 and 12.1.0 - 12.1.3 is vulnerable to a denial of service as the server may crash under certain conditions with a specially crafted query with XML columns.