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-2022-28842HIGHAdobe Bridge Font Parsing Use-After-Free Remote Code Execution VulnerabilityEPSS 3.1%CVE-2018-9969—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.1.1049. User interactioEPSS 3.1%CVE-2018-9970—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.1.1049. User interactioEPSS 3.1%CVE-2018-9967—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.1.1049. User interactioEPSS 3.1%CVE-2018-9968—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.1.1049. User interactioEPSS 3.1%CVE-2018-9975—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.1.1049. User interactioEPSS 3.1%CVE-2018-9944—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.0.29935. User interactiEPSS 3.1%CVE-2018-9945—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.0.29935. User interactiEPSS 3.1%CVE-2021-21039HIGHAcrobat Reader DC Use-After-Free Vulnerability Could Lead To Arbitrary Code ExecutionEPSS 3.1%CVE-2021-21041HIGHAcrobat Reader DC Use-After-Free Vulnerability Could Lead To Arbitrary Code ExecutionEPSS 3.1%CVE-2021-21040HIGHAcrobat Reader DC Use-After-Free Vulnerability Could Lead To Arbitrary Code ExecutionEPSS 3.1%CVE-2020-13560HIGHA use after free vulnerability exists in the JavaScript engine of Foxit Software’s Foxit PDF Reader, version 10.1.0.37527. A specially craftEPSS 3.1%CVE-2019-6773LOWThis vulnerability allows remote attackers to disclose sensitive information on vulnerable installations of Foxit Reader 9.4.1.16828. User iEPSS 3.0%CVE-2020-6819HIGHUnder certain conditions, when running the nsDocShell destructor, a race condition can cause a use-after-free. We are aware of targeted attaEPSS 3.0%KEVCVE-2018-7817—A Use After Free (CWE-416) vulnerability exists in Zelio Soft 2 v5.1 and prior versions which could cause remote code execution when openingEPSS 3.0%CVE-2017-10959—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 8.3.1.21155. User interactiEPSS 3.0%CVE-2023-28285HIGHMicrosoft Office Remote Code Execution VulnerabilityEPSS 3.0%CVE-2021-21708HIGHUAF due to php_filter_float() failingEPSS 3.0%CVE-2025-14765HIGHUse after free in WebGPU in Google Chrome prior to 143.0.7499.147 allowed a remote attacker to potentially exploit heap corruption via a craEPSS 3.0%CVE-2022-2852HIGHUse after free in FedCM in Google Chrome prior to 104.0.5112.101 allowed a remote attacker to potentially exploit heap corruption via a crafEPSS 3.0%