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-2020-10906HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit Reader 9.7.1.29511. User interactionEPSS 4.9%CVE-2024-12382HIGHUse after free in Translate in Google Chrome prior to 131.0.6778.139 allowed a remote attacker to potentially exploit heap corruption via a EPSS 4.9%CVE-2020-10907HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit Reader 9.7.1.29511. User interactionEPSS 4.9%CVE-2020-10900HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit Reader 9.7.1.29511. User interactionEPSS 4.9%CVE-2026-24289HIGHWindows Kernel Elevation of Privilege VulnerabilityEPSS 4.9%CVE-2020-10899HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit Reader 9.7.1.29511. User interactionEPSS 4.8%CVE-2023-49288HIGHDenial of Service in HTTP Collapsed Forwarding in SquidEPSS 4.8%CVE-2023-29358HIGHWindows GDI Elevation of Privilege VulnerabilityEPSS 4.7%CVE-2021-28631HIGHAdobe Acrobat Reader DC AcroForm Field Use-After-Free Remote Code Execution VulnerabilityEPSS 4.7%CVE-2021-28552HIGHAdobe Acrobat Reader DC XFA Template Use-After-Free Remote Code Execution VulnerabilityEPSS 4.7%CVE-2021-40420HIGHA use-after-free vulnerability exists in the JavaScript engine of Foxit Software’s PDF Reader, version 11.1.0.52543. A specially-crafted PDFEPSS 4.7%CVE-2025-50177HIGHMicrosoft Message Queuing (MSMQ) Remote Code Execution VulnerabilityEPSS 4.6%CVE-2018-16841MEDIUMSamba from version 4.3.0 and before versions 4.7.12, 4.8.7 and 4.9.3 are vulnerable to a denial of service. When configured to accept smart-EPSS 4.6%CVE-2026-46242HIGHeventpoll: fix ep_remove struct eventpoll / struct file UAFEPSS 4.6%CVE-2026-2313HIGHUse after free in CSS in Google Chrome prior to 145.0.7632.45 allowed a remote attacker to potentially exploit heap corruption via a craftedEPSS 4.6%CVE-2016-8618MEDIUMThe libcurl API function called `curl_maprintf()` before version 7.51.0 can be tricked into doing a double-free due to an unsafe `size_t` muEPSS 4.6%CVE-2018-17679—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.2.0.9297. User interactioEPSS 4.6%CVE-2024-41830HIGHTalos Security Advisory for Adobe (TALOS-2024-2009)EPSS 4.5%CVE-2024-30032HIGHWindows DWM Core Library Elevation of Privilege VulnerabilityEPSS 4.5%CVE-2018-9951—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.0.29935. User interactiEPSS 4.5%