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-2025-29888MEDIUMFile Station 5EPSS 0.5%CVE-2026-92626HIGHControl iD iDSecure Unauthenticated Denial of ServiceEPSS 0.5%CVE-2025-56225HIGHfluidsynth-2.4.6 and earlier versions is vulnerable to Null pointer dereference in fluid_synth_monopoly.c, that can be triggered when loadinEPSS 0.5%CVE-2026-83571MEDIUMWindows Audio Service Information Disclosure VulnerabilityEPSS 0.5%CVE-2022-39837MEDIUMAn issue was discovered in Connected Vehicle Systems Alliance (COVESA) dlt-daemon through 2.18.8. Due to a faulty DLT file parser, a craftedEPSS 0.5%CVE-2026-0968LOWLibssh: libssh: denial of service due to malformed sftp messageEPSS 0.5%CVE-2023-50432MEDIUMsimple-dhcp-server through ec976d2 allows remote attackers to cause a denial of service (daemon crash) by sending a DHCP packet without any EPSS 0.5%CVE-2026-43117CRITICALbtrfs: tracepoints: get correct superblock from dentry in event btrfs_sync_file()EPSS 0.5%CVE-2024-39130HIGHA NULL Pointer Dereference discovered in DumpTS v0.1.0-nightly allows attackers to cause a denial of service via the function DumpOneStream(EPSS 0.5%CVE-2025-62409MEDIUMEnvoy allows large requests and responses to cause TCP connection pool crashEPSS 0.5%CVE-2025-66281MEDIUMQTS, QuTS heroEPSS 0.5%CVE-2025-47205MEDIUMQTS, QuTS heroEPSS 0.5%CVE-2026-48829HIGHIn GNU SASL before 2.2.3, DIGEST-MD5 has a NULL pointer dereference affecting both clients and servers, via a known token with no accompanyiEPSS 0.5%CVE-2023-30756HIGHA vulnerability has been identified in SIMATIC CP 1242-7 V2 (incl. SIPLUS variants) (All versions < V3.5.20), SIMATIC CP 1243-1 (incl. SIPLUEPSS 0.5%CVE-2024-41338HIGHA NULL pointer dereference in Draytek devices Vigor 165/166 prior to v4.2.6 , Vigor 2620/LTE200 prior to v3.9.8.8, Vigor 2860/2925 prior to EPSS 0.5%CVE-2022-21546HIGHscsi: target: Fix WRITE_SAME No Data Buffer crashEPSS 0.5%CVE-2023-1355HIGHNULL Pointer Dereference in vim/vimEPSS 0.5%CVE-2023-28827HIGHA vulnerability has been identified in SIMATIC CP 1242-7 V2 (incl. SIPLUS variants) (All versions < V3.5.20), SIMATIC CP 1243-1 (incl. SIPLUEPSS 0.5%CVE-2024-3186MEDIUMCWE-476 NULL Pointer Dereference vulnerability in the evalExpr() function of GoAhead Web Server (version <= 6.0.0) when compiled with the MEEPSS 0.5%CVE-2025-22490MEDIUMFile Station 5EPSS 0.5%