Weaknesses of type CWE-476

2,330 results

Desreferência de nulo autenticada remota

A aplicação não valida corretamente se um ponteiro ou referência é nulo antes de usá-lo, permitindo que um usuário autenticado remotamente forneça entrada que causa uma desreferência de nulo. O resultado é um crash da aplicação ou, em cenários mais graves, execução de código não prevista, dependendo de como a memória é tratada.

Example

Um endpoint de API autenticada que busca um usuário por ID, mas não verifica se o resultado da busca é nulo. Um atacante autenticado fornece um ID inexistente, o código tenta acessar propriedades do resultado nulo e a aplicação falha ou se comporta de forma imprevista.

How to mitigate

Sempre validar retornos de funções que podem ser nulos antes de acessar seus membros ou métodos. Use assertions, verificações explícitas (if obj != null) ou mecanismos de linguagem como optional/Maybe types para forçar o tratamento seguro de valores nulos.

CVE-2026-50366MEDIUMWindows Active Directory Domain Services Denial of Service VulnerabilityEPSS 1.1%CVE-2023-45667MEDIUMNull pointer dereference because of an uninitialized variable in stb_imageEPSS 1.1%CVE-2021-21057MEDIUMAcrobat Reader DC Invalid Memory Read Due To An Uninitialized PointerEPSS 1.1%CVE-2022-24808MEDIUMnet-snmp: A malformed OID in a SET request to NET-SNMP-AGENT-MIB::nsLogTable can cause a NULL pointer dereferenceEPSS 1.1%CVE-2026-72949HIGHWindows SMB Server Network Transport Driver (srvnet.sys) Denial of Service VulnerabilityEPSS 1.1%CVE-2025-11846MEDIUMA null pointer dereference vulnerability in the account settings CGI program of the Zyxel VMG3625-T50B firmware versions through 5.50(ABPM.9EPSS 1.1%CVE-2023-3316MEDIUMA NULL pointer dereference in TIFFClose() is caused by a failure to open an output file (non-existent path or a path that requires permissions like /dev/null) while specifying zones.EPSS 1.1%CVE-2024-50609HIGHAn issue was discovered in Fluent Bit 3.1.9. When the OpenTelemetry input plugin is running and listening on an IP address and port, one canEPSS 1.1%CVE-2024-50608HIGHAn issue was discovered in Fluent Bit 3.1.9. When the Prometheus Remote Write input plugin is running and listening on an IP address and porEPSS 1.1%CVE-2021-33717—A vulnerability has been identified in JT2Go (All versions < V13.2.0.1), Teamcenter Visualization (All versions < V13.2.0.1). When parsing sEPSS 1.1%CVE-2020-1656HIGHJunos OS: When a DHCPv6 Relay-Agent is configured upon receipt of a specific DHCPv6 client message, Remote Code Execution may occur.EPSS 1.1%CVE-2022-23589MEDIUMNull pointer dereference in Grappler's `IsConstant` in TensorflowEPSS 1.1%CVE-2024-47542MEDIUMGHSL-2024-235: GStreamer ID3v2 parser out-of-bounds read and NULL-pointer dereferenceEPSS 1.1%CVE-2022-24809MEDIUMnet-snmp: A malformed OID in a SET request to NET-SNMP-AGENT-MIB::nsLogTable can cause a NULL pointer dereferenceEPSS 1.1%CVE-2023-46427CRITICALAn issue was discovered in gpac version 2.3-DEV-rev588-g7edc40fee-master, allows remote attackers to execute arbitrary code, cause a denial EPSS 1.1%CVE-2021-23191—A security issue was found in htmldoc v1.9.12 and before. A NULL pointer dereference in the function image_load_jpeg() in image.cxx may resuEPSS 1.1%CVE-2025-14769HIGHipfw denial of serviceEPSS 1.1%CVE-2021-26927—A flaw was found in jasper before 2.0.25. A null pointer dereference in jp2_decode in jp2_dec.c may lead to program crash and denial of servEPSS 1.1%CVE-2017-7511—poppler since version 0.17.3 has been vulnerable to NULL pointer dereference in pdfunite triggered by specially crafted documents.EPSS 1.1%CVE-2023-28484MEDIUMIn libxml2 before 2.10.4, parsing of certain invalid XSD schemas can lead to a NULL pointer dereference and subsequently a segfault. This ocEPSS 1.1%