Falhas do tipo CWE-416

5.005 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-2018-11617—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.0.29935. User interactiEPSS 2.8%CVE-2018-14299—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.1.5096. User interactioEPSS 2.8%CVE-2018-14308—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.1.5096. User interactioEPSS 2.8%CVE-2018-14312—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.1.5096. User interactioEPSS 2.8%CVE-2018-14298—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.1.5096. User interactioEPSS 2.8%CVE-2018-14303—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.1.5096. User interactioEPSS 2.8%CVE-2018-14310—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.1.0.5096. User interactioEPSS 2.8%CVE-2018-14307—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.1.5096. User interactioEPSS 2.8%CVE-2018-11619—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.0.29935. User interactiEPSS 2.8%CVE-2018-14292—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.1.5096. User interactioEPSS 2.8%CVE-2018-14309—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.1.0.5096. User interactioEPSS 2.8%CVE-2018-14297—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.1.5096. User interactioEPSS 2.8%CVE-2018-14314—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.1.5096. User interactioEPSS 2.8%CVE-2021-42379HIGHA use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in theEPSS 2.8%CVE-2021-42381HIGHA use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in theEPSS 2.8%CVE-2021-42385HIGHA use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in theEPSS 2.8%CVE-2024-39383HIGHPoC sample of unknown vulnerability detected by EXPMON systemEPSS 2.8%CVE-2021-31455HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit Reader 10.1.1.37576. User interactioEPSS 2.8%CVE-2019-19344MEDIUMThere is a use-after-free issue in all samba 4.9.x versions before 4.9.18, all samba 4.10.x versions before 4.10.12 and all samba 4.11.x verEPSS 2.8%CVE-2021-36055HIGHXMP Toolkit SDK Use After Free Vulnerability In ReadingXMPNewDOM Could Lead To Arbitrary Code ExecutionEPSS 2.8%