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-2018-17705—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.2.0.9297. User interactioEPSS 3.9%CVE-2018-17694—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit PhantomPDF 9.2.0.9297. User interaEPSS 3.9%CVE-2018-17698—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit PhantomPDF 9.2.0.9297. User interaEPSS 3.9%CVE-2018-17683—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.2.0.9297. User interactioEPSS 3.9%CVE-2018-17695—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit PhantomPDF 9.2.0.9297. User interaEPSS 3.9%CVE-2018-17702—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.2.0.9297. User interactioEPSS 3.9%CVE-2019-13332HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit Reader 9.6.0.25114. User interactionEPSS 3.9%CVE-2019-13327HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit Reader 9.5.0.20723. User interactionEPSS 3.9%CVE-2019-13326HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit Reader 9.5.0.20723. User interactionEPSS 3.9%CVE-2019-13328HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit Reader 9.5.0.20723. User interactionEPSS 3.9%CVE-2022-35665HIGHAdobe Acrobat Reader Use-After-Free Arbitrary Code ExecutionEPSS 3.8%CVE-2026-42530CRITICALNGINX Open-Source ngx_http_v3_module vulnerabilityEPSS 3.8%CVE-2018-17616—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.1.5096. User interactioEPSS 3.8%CVE-2018-17617—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.1.5096. User interactioEPSS 3.8%CVE-2018-17619—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.1.5096. User interactioEPSS 3.8%CVE-2018-17620—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.1.5096. User interactioEPSS 3.8%CVE-2022-27800HIGHAdobe Acrobat Reader DC Annotation Use-After-Free Remote Code Execution VulnerabilityEPSS 3.8%CVE-2024-38140CRITICALWindows Reliable Multicast Transport Driver (RMCAST) Remote Code Execution VulnerabilityEPSS 3.8%CVE-2022-27797HIGHAdobe Acrobat Reader DC Annotation Use-After-Free Remote Code Execution VulnerabilityEPSS 3.8%CVE-2022-27795HIGHAdobe Acrobat Reader DC AcroForm isDefaultChecked Use-After-Free Remote Code Execution VulnerabilityEPSS 3.8%