Falhas do tipo CWE-416

6.170 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-2019-6730—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader. User interaction is requirEPSS 4.2%CVE-2019-6727—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader. User interaction is requirEPSS 4.2%CVE-2026-20871HIGHDesktop Window Manager Elevation of Privilege VulnerabilityEPSS 4.1%CVE-2019-13320HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit Reader 9.5.0.20723. User interactionEPSS 4.1%CVE-2019-13319HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit Reader 9.5.0.20723. User interactionEPSS 4.1%CVE-2020-15637LOWThis vulnerability allows remote attackers to disclose sensitive information on affected installations of Foxit PhantomPDF 9.7.1.29511. UserEPSS 4.1%CVE-2022-27800HIGHAdobe Acrobat Reader DC Annotation Use-After-Free Remote Code Execution VulnerabilityEPSS 4.1%CVE-2022-28237HIGHAdobe Acrobat Reader DC Annotation Use-After-Free Remote Code Execution VulnerabilityEPSS 4.1%CVE-2022-28235HIGHAdobe Acrobat Reader DC AcroForm Use-After-Free Remote Code Execution VulnerabilityEPSS 4.1%CVE-2022-27802HIGHAdobe Acrobat Reader DC Annotation Use-After-Free Remote Code Execution VulnerabilityEPSS 4.1%CVE-2022-27797HIGHAdobe Acrobat Reader DC Annotation Use-After-Free Remote Code Execution VulnerabilityEPSS 4.1%CVE-2022-27795HIGHAdobe Acrobat Reader DC AcroForm isDefaultChecked Use-After-Free Remote Code Execution VulnerabilityEPSS 4.1%CVE-2022-27801HIGHAdobe Acrobat Reader DC Annotation Use-After-Free Remote Code Execution VulnerabilityEPSS 4.1%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 4.0%KEVCVE-2022-23608HIGHUse after free in PJSIPEPSS 4.0%CVE-2026-45447HIGHHeap Use-After-Free in the PKCS7_verify() FunctionEPSS 4.0%CVE-2021-34841HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit PDF Reader 11.0.0.49893. User interaEPSS 4.0%CVE-2021-34846HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit PDF Reader 11.0.0.49893. User interaEPSS 4.0%CVE-2021-34839HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit PDF Reader 11.0.0.49893. User interaEPSS 4.0%CVE-2021-34845HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit PDF Reader 11.0.0.49893. User interaEPSS 4.0%