Falhas do tipo CWE-416

5.038 resultados

Uso após liberação de memória

Ocorre quando o código tenta acessar (ler ou escrever) um bloco de memória que já foi liberado (free, delete). O programa mantém um ponteiro para a memória, mas o sistema operacional pode reatribuir essa região para outro uso, causando corrupção de dados, travamento ou execução de código arbitrário.

Exemplo

Um servidor web aloca memória para armazenar dados de sessão do usuário, depois libera essa memória quando a sessão encerra. Se uma thread continuar tentando acessar essa sessão após a liberação, pode ler dados de outra sessão ou sobrescrever dados críticos de outro processo.

Como mitigar

Sempre anule ponteiros após liberar memória (ptr = NULL), use variáveis de controle para rastrear estado de alocação, implemente gerenciamento automático de memória quando possível (smart pointers em C++), e execute testes com sanitizers (AddressSanitizer, Valgrind) durante desenvolvimento e CI/CD.

CVE-2022-28672HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit PDF Reader 11.2.1.53537. User interaEPSS 1.9%CVE-2022-28250MEDIUMAdobe Acrobat Reader DC Annotation Use-After-Free Information Disclosure VulnerabilityEPSS 1.9%CVE-2021-46655HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Bentley View 10.15.0.75. User interaction EPSS 1.9%CVE-2025-21307CRITICALWindows Reliable Multicast Transport Driver (RMCAST) Remote Code Execution VulnerabilityEPSS 1.9%CVE-2025-21224HIGHWindows Line Printer Daemon (LPD) Service Remote Code Execution VulnerabilityEPSS 1.9%CVE-2023-38573HIGHA use-after-free vulnerability exists in the way Foxit Reader 12.1.2.15356 handles a signature field. A specially crafted Javascript code inEPSS 1.9%CVE-2025-30400HIGHMicrosoft DWM Core Library Elevation of Privilege VulnerabilityEPSS 1.9%KEVCVE-2021-21870HIGHA use-after-free vulnerability exists in the JavaScript engine of Foxit Software’s PDF Reader, version 10.1.4.37651. A specially crafted PDFEPSS 1.9%CVE-2021-21893HIGHA use-after-free vulnerability exists in the JavaScript engine of Foxit Software’s PDF Reader, version 11.0.0.49893. A specially crafted PDFEPSS 1.9%CVE-2025-26663HIGHWindows Lightweight Directory Access Protocol (LDAP) Remote Code Execution VulnerabilityEPSS 1.9%CVE-2021-34330—A vulnerability has been identified in JT2Go (All versions < V13.2), Teamcenter Visualization (All versions < V13.2). The Jt981.dll library EPSS 1.9%CVE-2024-38259HIGHMicrosoft Management Console Remote Code Execution VulnerabilityEPSS 1.9%CVE-2024-31083HIGHXorg-x11-server: use-after-free in procrenderaddglyphsEPSS 1.9%CVE-2022-24101LOWAdobe Acrobat Reader DC Annotation Use-After-Free Information Disclosure VulnerabilityEPSS 1.9%CVE-2020-13558HIGHA code execution vulnerability exists in the AudioSourceProviderGStreamer functionality of Webkit WebKitGTK 2.30.1. A specially crafted web EPSS 1.9%CVE-2023-32174CRITICALUnified Automation UaGateway NodeManagerOpcUa Use-After-Free Remote Code Execution VulnerabilityEPSS 1.9%CVE-2022-24062HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Sante DICOM Viewer Pro 13.2.0.21165. User EPSS 1.8%CVE-2021-28593LOWAdobe Illustrator PostScript Parsing Use-After-Free Information Disclosure VulnerabilityEPSS 1.8%CVE-2025-21406HIGHWindows Telephony Service Remote Code Execution VulnerabilityEPSS 1.8%CVE-2024-26221HIGHWindows DNS Server Remote Code Execution VulnerabilityEPSS 1.8%