Falhas do tipo CWE-416

5.024 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-2023-38230MEDIUMZDI-CAN-21318: Adobe Acrobat Reader DC Font Parsing Use-After-Free Information Disclosure VulnerabilityEPSS 2.7%CVE-2018-0170—A vulnerability in the Cisco Umbrella Integration feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause EPSS 2.7%CVE-2021-32944—A use-after-free issue exists in the DGN file-reading procedure in the Drawings SDK (All versions prior to 2022.4) resulting from the lack oEPSS 2.7%CVE-2023-36034HIGHMicrosoft Edge (Chromium-based) Remote Code Execution VulnerabilityEPSS 2.7%CVE-2018-14809—Fuji Electric V-Server 4.0.3.0 and prior, A use after free vulnerability has been identified, which may allow remote code execution.EPSS 2.7%CVE-2022-30657HIGHAdobe InCopy Font Parsing Use-After-Free Remote Code Execution VulnerabilityEPSS 2.7%CVE-2022-28824HIGHAdobe FrameMaker Font Parsing Use-After-Free Remote Code Execution VulnerabilityEPSS 2.7%CVE-2022-30655HIGHAdobe InCopy Font Parsing Use-After-Free Remote Code Execution VulnerabilityEPSS 2.7%CVE-2022-28823HIGHAdobe FrameMaker Font Parsing Use-After-Free Remote Code Execution VulnerabilityEPSS 2.7%CVE-2019-6771LOWThis vulnerability allows remote attackers to disclose sensitive information on vulnerable installations of Foxit Reader 2019.010.20098. UseEPSS 2.7%CVE-2019-6770LOWThis vulnerability allows remote attackers to disclose sensitive information on vulnerable installations of Foxit Reader 9.4.1.16828. User iEPSS 2.7%CVE-2019-6766LOWThis vulnerability allows remote attackers to disclose sensitive information on vulnerable installations of Foxit Reader 9.4.1.16828. User iEPSS 2.7%CVE-2019-6772LOWThis vulnerability allows remote attackers to disclose sensitive information on vulnerable installations of Foxit Reader 2019.010.20098. UseEPSS 2.7%CVE-2019-6758LOWThis vulnerability allows remote attackers to disclose sensitive information on vulnerable installations of Foxit Reader 9.4.16811. User intEPSS 2.7%CVE-2022-38437MEDIUMAdobe Acrobat Reader Use After Free Memory leakEPSS 2.6%CVE-2023-26417HIGHZDI-CAN-20583: Adobe Acrobat Reader DC Popup Use-After-Free Remote Code Execution VulnerabilityEPSS 2.6%CVE-2024-27975HIGHAn Use-after-free vulnerability in WLAvalancheService component of Ivanti Avalanche before 6.4.3 allows a remote authenticated attacker to eEPSS 2.6%CVE-2023-44372HIGHTALOS-2023-1842 - Adobe Acrobat Reader U3D page event use-after-free vulnerabilityEPSS 2.6%CVE-2024-20731HIGHTALOS-2023-1901 - Adobe Acrobat Reader FileAttachment PDAnnot destroy use-after-free vulnerabilityEPSS 2.6%CVE-2026-65775HIGHWindows Win32k Elevation of Privilege VulnerabilityEPSS 2.6%