Falhas do tipo CWE-416

5.043 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-2025-15280HIGHFontForge SFD File Parsing Use-After-Free Remote Code Execution VulnerabilityEPSS 0.6%CVE-2025-59282HIGHInternet Information Services (IIS) Inbox COM Objects (Global Memory) Remote Code Execution VulnerabilityEPSS 0.6%CVE-2026-57986HIGHMicrosoft Edge (Chromium-based) Remote Code Execution VulnerabilityEPSS 0.6%CVE-2026-66315HIGHMicrosoft Edge (Chromium-based) Remote Code Execution VulnerabilityEPSS 0.6%CVE-2026-58287HIGHMicrosoft Edge (Chromium-based) Remote Code Execution VulnerabilityEPSS 0.6%CVE-2026-57992HIGHMicrosoft Edge (Chromium-based) Remote Code Execution VulnerabilityEPSS 0.6%CVE-2026-58294HIGHMicrosoft Edge (Chromium-based) Remote Code Execution VulnerabilityEPSS 0.6%CVE-2026-47654HIGHRemote Desktop Client Remote Code Execution VulnerabilityEPSS 0.6%CVE-2026-58288HIGHMicrosoft Edge (Chromium-based) Remote Code Execution VulnerabilityEPSS 0.6%CVE-2026-57984HIGHMicrosoft Edge (Chromium-based) Remote Code Execution VulnerabilityEPSS 0.6%CVE-2026-69607HIGHWindows Deployment Services Remote Code Execution VulnerabilityEPSS 0.6%CVE-2026-44801HIGHRemote Desktop Client Remote Code Execution VulnerabilityEPSS 0.6%CVE-2026-48563HIGHRemote Desktop Client Remote Code Execution VulnerabilityEPSS 0.6%CVE-2026-69397HIGHMicrosoft OpenSSH for Windows Remote Code Execution VulnerabilityEPSS 0.6%CVE-2026-58276HIGHMicrosoft Edge (Chromium-based) Remote Code Execution VulnerabilityEPSS 0.6%CVE-2024-7527HIGHUnexpected marking work at the start of sweeping could have led to a use-after-free. This vulnerability affects Firefox < 129, Firefox ESR <EPSS 0.6%CVE-2026-74943CRITICALUse-after-free in the Graphics: ImageLib componentEPSS 0.6%CVE-2026-74940CRITICALUse-after-free in the Graphics: Text componentEPSS 0.6%CVE-2024-36844HIGHlibmodbus v3.1.6 was discovered to contain a use-after-free via the ctx->backend pointer. This vulnerability allows attackers to cause a DenEPSS 0.6%CVE-2025-21281HIGHMicrosoft COM for Windows Elevation of Privilege VulnerabilityEPSS 0.6%