Falhas do tipo CWE-416

5.036 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-2024-38085HIGHWindows Graphics Component Elevation of Privilege VulnerabilityEPSS 5.3%CVE-2019-17140HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit PhantomPDF 9.6.0.25114. User interacEPSS 5.2%CVE-2019-17141HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit PhantomPDF 9.6.0.25114. User interacEPSS 5.2%CVE-2021-28632HIGHZDI-CAN-13471: Adobe Acrobat Reader DC AcroForm Field Use-After-Free Remote Code Execution VulnerabilityEPSS 5.2%CVE-2021-28562HIGHAdobe Acrobat Reader use-after-free could lead to arbitrary code executionEPSS 5.1%CVE-2016-8619MEDIUMThe function `read_data()` in security.c in curl before version 7.51.0 is vulnerable to memory double free.EPSS 5.0%CVE-2024-5841HIGHUse after free in V8 in Google Chrome prior to 126.0.6478.54 allowed a remote attacker to potentially exploit heap corruption via a crafted EPSS 5.0%CVE-2024-9954HIGHUse after free in AI in Google Chrome prior to 130.0.6723.58 allowed a remote attacker to potentially exploit heap corruption via a crafted EPSS 4.9%CVE-2020-27267—KEPServerEX v6.0 to v6.9, ThingWorx Kepware Server v6.8 and v6.9, ThingWorx Industrial Connectivity (all versions), OPC-Aggregator (all versEPSS 4.9%CVE-2026-5281HIGHUse after free in Dawn in Google Chrome prior to 146.0.7680.178 allowed a remote attacker who had compromised the renderer process to executEPSS 4.9%KEVCVE-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-2023-44371HIGHZDI-CAN-21998: Adobe Acrobat Reader DC Font Parsing Use-After-Free Remote Code Execution VulnerabilityEPSS 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-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-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 4.8%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-2018-9951—This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.0.29935. User interactiEPSS 4.8%CVE-2023-29358HIGHWindows GDI Elevation of Privilege VulnerabilityEPSS 4.7%