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-2023-6705HIGHUse after free in WebRTC in Google Chrome prior to 120.0.6099.109 allowed a remote attacker to potentially exploit heap corruption via a craEPSS 0.7%CVE-2026-24266MEDIUMNVIDIA Triton Inference Server for Linux contains a vulnerability where an attacker can cause a use-after-free issue. A successful exploit oEPSS 0.7%CVE-2026-8746MEDIUMOpen5GS NRF nghttp2-server.c discover_handler use after freeEPSS 0.7%CVE-2026-57089HIGHWindows SMB Server Network Transport Driver (srvnet.sys) Remote Code Execution VulnerabilityEPSS 0.7%CVE-2026-58164HIGHApache Traffic Server: Remap configuration lifetime and TOCTOU errors cause use-after-freeEPSS 0.7%CVE-2026-72954HIGHWindows Deployment Services Remote Code Execution VulnerabilityEPSS 0.7%CVE-2026-62813HIGHWindows Active Directory Domain Services Remote Code Execution VulnerabilityEPSS 0.7%CVE-2026-70341HIGHMicrosoft Edge (Chromium-based) Remote Code Execution VulnerabilityEPSS 0.7%CVE-2026-72943HIGHWindows Deployment Services Remote Code Execution VulnerabilityEPSS 0.7%CVE-2026-69539HIGHRemote Desktop Services Remote Code Execution VulnerabilityEPSS 0.7%CVE-2026-69599HIGHRemote Desktop Services Remote Code Execution VulnerabilityEPSS 0.7%CVE-2026-62787HIGHWindows DNS Server Remote Code Execution VulnerabilityEPSS 0.7%CVE-2026-72928HIGHWindows DNS Server Remote Code Execution VulnerabilityEPSS 0.7%CVE-2022-4921HIGHUse after free in Accessibility in Google Chrome prior to 99.0.4844.51 allowed a remote attacker who convinced a user to engage in specific EPSS 0.7%CVE-2023-35943MEDIUMEnvoy vulnerable to CORS filter segfault when origin header is removed EPSS 0.7%CVE-2026-43822CRITICALA use after free issue was addressed with improved memory management. This issue is fixed in iOS 18.7.10 and iPadOS 18.7.10, iOS 26.6 and iPEPSS 0.7%CVE-2026-43778CRITICALA use after free issue was addressed with improved memory management. This issue is fixed in iOS 18.7.10 and iPadOS 18.7.10, iOS 26.6 and iPEPSS 0.7%CVE-2026-64700CRITICALA use after free issue was addressed with improved memory management. This issue is fixed in iOS 18.7.10 and iPadOS 18.7.10, iOS 26.6 and iPEPSS 0.7%CVE-2026-43799CRITICALA use after free issue was addressed with improved memory management. This issue is fixed in iOS 18.7.10 and iPadOS 18.7.10, iOS 26.6 and iPEPSS 0.7%CVE-2022-0849HIGHUse After Free in r_reg_get_name_idx in radareorg/radare2EPSS 0.7%