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-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-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-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-2023-0215HIGHUse-after-free following BIO_new_NDEFEPSS 4.5%CVE-2021-30661HIGHA use after free issue was addressed with improved memory management. This issue is fixed in Safari 14.1, iOS 12.5.3, iOS 14.5 and iPadOS 14EPSS 4.5%KEVCVE-2026-24289HIGHWindows Kernel Elevation of Privilege VulnerabilityEPSS 4.5%CVE-2022-34233MEDIUMAdobe Acrobat Reader DC Doc print Use-After-Free Information Disclosure VulnerabilityEPSS 4.5%CVE-2025-50177HIGHMicrosoft Message Queuing (MSMQ) Remote Code Execution VulnerabilityEPSS 4.4%CVE-2019-18197HIGHIn xsltCopyText in transform.c in libxslt 1.1.33, a pointer variable isn't reset under certain circumstances. If the relevant memory area haEPSS 4.4%CVE-2021-28641HIGHAdobe Acrobat Reader Use-After-Free Arbitrary Code Execution VulnerabilityEPSS 4.3%CVE-2022-34220HIGHAcrobat Reader DC Font Parsing Use-After-Free Remote Code Execution VulnerabilityEPSS 4.3%CVE-2019-6769HIGHThis vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.4.1.16828. User interactiEPSS 4.3%CVE-2024-30284HIGHZDI-CAN-23466: Adobe Acrobat Reader DC Annotation Use-After-Free Remote Code Execution VulnerabilityEPSS 4.3%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 4.3%CVE-2019-6775HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit Reader 9.5.0.20723. User interactionEPSS 4.2%CVE-2019-6774HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit Reader 9.4.1.16828. User interactionEPSS 4.2%