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-2025-21759HIGHipv6: mcast: extend RCU protection in igmp6_send()EPSS 7.8%CVE-2024-20752HIGHZDI-CAN-22653: Adobe Bridge PS File Parsing Use-After-Free Remote Code Execution VulnerabilityEPSS 7.8%CVE-2019-13317HIGHThis vulnerability allows remote atackers to execute arbitrary code on affected installations of Foxit PhantomPDF 9.5.0.20723. User interactEPSS 7.7%CVE-2019-13316HIGHThis vulnerability allows remote atackers to execute arbitrary code on affected installations of Foxit PhantomPDF 9.5.0.20723. User interactEPSS 7.7%CVE-2019-13315HIGHThis vulnerability allows remote atackers to execute arbitrary code on affected installations of Foxit Reader 9.5.0.20723. User interaction EPSS 7.7%CVE-2025-9478HIGHUse after free in ANGLE in Google Chrome prior to 139.0.7258.154 allowed a remote attacker to potentially exploit heap corruption via a crafEPSS 7.4%CVE-2021-44705HIGHAdobe Acrobat Reader Use-After-Free could lead to Arbitrary code executionEPSS 7.4%CVE-2021-30554HIGHUse after free in WebGL in Google Chrome prior to 91.0.4472.114 allowed a remote attacker to potentially exploit heap corruption via a craftEPSS 7.4%KEVCVE-2024-45434CRITICALOpenSynergy BlueSDK (aka Blue SDK) through 6.x has a Use-After-Free. The specific flaw exists within the BlueSDK Bluetooth stack. The issue EPSS 7.3%CVE-2019-5018HIGHAn exploitable use after free vulnerability exists in the window function functionality of Sqlite3 3.26.0. A specially crafted SQL command cEPSS 6.7%CVE-2022-4379HIGHA use-after-free vulnerability was found in __nfs42_ssc_open() in fs/nfs/nfs4file.c in the Linux kernel. This flaw allows an attacker to conEPSS 6.6%CVE-2024-43504HIGHMicrosoft Excel Remote Code Execution VulnerabilityEPSS 6.4%CVE-2019-17142HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit PhantomPDF 9.6.0.25114. User interacEPSS 6.3%CVE-2021-45063LOWAdobe Acrobat Reader DC JP2 File Parsing Use-After-Free Information Disclosure VulnerabilityEPSS 6.2%CVE-2022-34219HIGHAdobe Acrobat Reader DC Font Parsing Use-After-Free Remote Code Execution VulnerabilityEPSS 6.2%CVE-2022-34216HIGHAdobe Acrobat Reader DC PDF Parsing Use-After-Free Remote Code Execution VulnerabilityEPSS 6.2%CVE-2026-42530CRITICALNGINX Open-Source ngx_http_v3_module vulnerabilityEPSS 6.2%CVE-2021-21831HIGHA use-after-free vulnerability exists in the JavaScript engine of Foxit Software’s PDF Reader, version 10.1.3.37598. A specially crafted PDFEPSS 6.1%CVE-2020-8855HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit PhantomPDF 9.7.0.2947. User interactEPSS 6.1%CVE-2020-8857HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit Reader 9.7.0.29455. User interactionEPSS 6.1%