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-2021-42779—A heap use after free issue was found in Opensc before version 0.22.0 in sc_file_valid.EPSS 2.1%CVE-2022-42896HIGHInfo Leak in l2cap_core in the Linux KernelEPSS 2.1%CVE-2021-34908HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Bentley View 10.15.0.75. User interaction EPSS 2.1%CVE-2023-36735CRITICALMicrosoft Edge (Chromium-based) Elevation of Privilege VulnerabilityEPSS 2.1%CVE-2021-46582HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Bentley MicroStation CONNECT 10.16.0.80. UEPSS 2.1%CVE-2021-34917HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Bentley View 10.15.0.75. User interaction EPSS 2.1%CVE-2021-34906HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Bentley View 10.15.0.75. User interaction EPSS 2.1%CVE-2021-34894HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Bentley View 10.15.0.75. User interaction EPSS 2.1%CVE-2021-34911HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Bentley View 10.15.0.75. User interaction EPSS 2.1%CVE-2021-34895HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Bentley View 10.15.0.75. User interaction EPSS 2.1%CVE-2022-24368LOWThis vulnerability allows remote attackers to disclose sensitive information on affected installations of Foxit PDF Reader 11.1.0.52543. UseEPSS 2.1%CVE-2021-46592HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Bentley MicroStation CONNECT 10.16.0.80. UEPSS 2.1%CVE-2021-46587HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Bentley MicroStation CONNECT 10.16.0.80. UEPSS 2.1%CVE-2024-38229HIGH.NET and Visual Studio Remote Code Execution VulnerabilityEPSS 2.1%CVE-2021-21061LOWAcrobat Pro DC Use-After-Free Vulnerability Could Lead to Information DisclosureEPSS 2.1%CVE-2024-28888HIGHA use-after-free vulnerability exists in the way Foxit Reader 2024.1.0.23997 handles a checkbox field object. A specially crafted JavascripEPSS 2.1%CVE-2019-5042HIGHAn exploitable Use-After-Free vulnerability exists in the way FunctionType 0 PDF elements are processed in Aspose.PDF 19.2 for C++. A speciaEPSS 2.1%CVE-2023-36741HIGHMicrosoft Edge (Chromium-based) Elevation of Privilege VulnerabilityEPSS 2.1%CVE-2023-31248HIGHLinux Kernel nftables Use-After-Free Local Privilege Escalation VulnerabilityEPSS 2.1%CVE-2021-34891HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Bentley View 10.15.0.75. User interaction EPSS 2.1%