Fallos del tipo CWE-476

2572 resultados

Desreferência de ponteiro nulo autenticada remota

A aplicação tenta acessar um objeto ou endereço de memória que não foi inicializado ou foi definido como nulo, sem verificar essa condição antes. Um atacante autenticado consegue provocar esse acesso inválido enviando dados malformados ou inesperados, causando crash ou comportamento indefinido.

Ejemplo

Um endpoint autenticado de API recebe um ID de usuário, faz uma busca no banco que retorna nulo (usuário não existe) e tenta acessar diretamente campos desse objeto nulo sem validação — resultando em erro 500 ou travamento da aplicação.

Cómo mitigar

Sempre verificar se um objeto é nulo antes de usá-lo; usar análise estática (linters, SAST) para detectar acessos potenciais a nulos; validar e tratar casos onde dados esperados podem estar ausentes, mesmo que o usuário esteja autenticado.

CVE-2024-47544MEDIUMGHSL-2024-238: GStreamer has NULL-pointer dereferences in MP4/MOV demuxer CENC handlingEPSS 1.1%CVE-2026-40405HIGHWindows TCP/IP Denial of Service VulnerabilityEPSS 1.1%CVE-2026-84392LOWA NULL Pointer Dereference vulnerability [CWE-476] vulnerability in Fortinet FortiOS 7.4 all versions, FortiOS 7.2 all versions, FortiOS 7.0EPSS 1.1%CVE-2025-1877HIGHD-Link DAP-1562 HTTP POST Request pure_auth_check null pointer dereferenceEPSS 1.1%CVE-2021-0251HIGHJunos OS: MX Series with MS-PIC, MS-SPC3, MS-MIC or MS-MPC: The BRAS Subscriber Services service activation portal is vulnerable to a Denial of Service (DoS) via malformed HTTP packetsEPSS 1.1%CVE-2026-67870CRITICALIn open62541 v1.5.5, the server-side AddReferences implementation contains an incomplete validation flaw for non-local ExpandedNodeId targetEPSS 1.1%CVE-2021-43824HIGHNull pointer dereference in envoyEPSS 1.1%CVE-2024-24989HIGHNGINX HTTP/3 QUIC vulnerabilityEPSS 1.1%CVE-2026-42766MEDIUMPossible NULL Dereference in Password-Based CMS DecryptionEPSS 1.1%CVE-2026-32071HIGHWindows Local Security Authority Subsystem Service (LSASS) Denial of Service VulnerabilityEPSS 1.1%CVE-2022-1748HIGHSofting Secure Integration Server NULL Pointer DereferenceEPSS 1.1%CVE-2022-3278MEDIUMNULL Pointer Dereference in vim/vimEPSS 1.1%CVE-2018-12469—Incorrect handling of an invalid value for an HTTP request parameter by Directory Server (aka Enterprise Server Administration web UI) in MiEPSS 1.1%CVE-2025-27113LOWlibxml2 before 2.12.10 and 2.13.x before 2.13.6 has a NULL pointer dereference in xmlPatMatch in pattern.c.EPSS 1.1%CVE-2026-25075HIGHstrongSwan 4.5.0 < 6.0.5 EAP-TTLS AVP Parsing Integer UnderflowEPSS 1.1%CVE-2024-47835MEDIUMGHSL-2024-263: Gstreamer NULL-pointer dereference in LRC subtitle parserEPSS 1.0%CVE-2023-0394MEDIUMA NULL pointer dereference flaw was found in rawv6_push_pending_frames in net/ipv6/raw.c in the network subcomponent in the Linux kernel. ThEPSS 1.0%CVE-2022-47929MEDIUMIn the Linux kernel before 6.1.6, a NULL pointer dereference bug in the traffic control subsystem allows an unprivileged user to trigger a dEPSS 1.0%CVE-2022-29224MEDIUMSegmentation fault leading to crash in EnvoyEPSS 1.0%CVE-2023-45931HIGHMesa 23.0.4 was discovered to contain a NULL pointer dereference in check_xshm() for the has_error state. NOTE: this is disputed because theEPSS 1.0%