Fallos del tipo CWE-416

5038 resultados

Uso após liberação de memória

Ocorre quando o código tenta acessar uma área de memória que já foi liberada (deallocated). O programa continua usando um ponteiro que aponta para um endereço inválido, causando leitura/escrita em memória não controlada. Isso pode levar a crash, corrupção de dados ou execução arbitrária de código.

Ejemplo

Um navegador aloca memória para um objeto DOM, depois o remove da página e libera a memória. Se um script JavaScript ainda tentar acessar esse objeto deletado, o navegador tenta ler/escrever em um endereço que agora contém outro dado, causando comportamento impredizível ou exploração por atacante.

Cómo mitigar

Use linguagens com garbage collection (Java, Python, C#) ou práticas rigorosas: null os ponteiros após free(), use smart pointers (C++), evite compartilhamento de referências sem sincronização, faça testes de memória com ferramentas como Valgrind ou AddressSanitizer.

CVE-2024-21426HIGHMicrosoft SharePoint Server Remote Code Execution VulnerabilityEPSS 3.9%CVE-2023-43000HIGHA use-after-free issue was addressed with improved memory management. This issue is fixed in macOS Ventura 13.5, iOS 16.6 and iPadOS 16.6, SEPSS 3.9%KEVCVE-2021-40730LOWAdobe Acrobat Reader DC JPEG2000 Parsing Use-After-Free Information Disclosure VulnerabilityEPSS 3.9%CVE-2020-24438LOWAcrobat Reader DC Use-After-Free Vulnerability Could Lead to Information DisclosureEPSS 3.9%CVE-2019-17143LOWThis vulnerability allows remote attackers to disclose sensitive information on affected installations of Foxit PhantomPDF 9.6.0.25114. UserEPSS 3.9%CVE-2019-6767HIGHThis vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.4.1.16828. User interactiEPSS 3.9%CVE-2022-1043—A flaw was found in the Linux kernel’s io_uring implementation. This flaw allows an attacker with a local account to corrupt system memory, EPSS 3.9%CVE-2018-17680—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.2.0.9297. User interactioEPSS 3.9%CVE-2018-17704—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.2.0.9297. User interactioEPSS 3.9%CVE-2018-17689—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit PhantomPDF 9.2.0.9297. User interaEPSS 3.9%CVE-2018-17688—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-2018-17682—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.2.0.9297. User interactioEPSS 3.9%CVE-2018-17703—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.2.0.9297. User interactioEPSS 3.9%CVE-2018-17698—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit PhantomPDF 9.2.0.9297. User interaEPSS 3.9%CVE-2018-17687—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-2018-17690—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit PhantomPDF 9.2.0.9297. User interaEPSS 3.9%CVE-2018-17681—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%