Weaknesses of type CWE-416

5,043 results

Uso após liberação de memória

Ocorre quando o código tenta acessar um bloco de memória que já foi desalocado (free/delete). O ponteiro continua apontando para aquele endereço, mas o dado ali pode ter sido sobrescrito por outra operação, causando comportamento impredizível, corrupção de dados ou execução de código arbitrário.

Example

Um buffer é alocado, depois liberado com free(). Mais adiante, o código ainda tenta ler ou escrever naquele mesmo ponteiro sem verificar. Se um atacante controlar a alocação subsequente daquele endereço, consegue manipular o conteúdo que será lido.

How to mitigate

Anule o ponteiro imediatamente após liberar (ptr = NULL), implemente análise estática para detectar acessos pós-liberação, use ferramentas como valgrind ou AddressSanitizer nos testes, e considere linguagens com gerenciamento automático de memória para código sensível.

CVE-2022-28673HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit PDF Reader 11.2.1.53537. User interaEPSS 1.1%CVE-2022-28677HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit PDF Reader 11.2.1.53537. User interaEPSS 1.1%CVE-2022-28676HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit PDF Reader 11.2.1.53537. User interaEPSS 1.1%CVE-2021-22662—A use after free issue has been identified in Fatek FvDesigner Version 1.5.76 and prior in the way the application processes project files, EPSS 1.1%CVE-2023-5854HIGHUse after free in Profiles in Google Chrome prior to 119.0.6045.105 allowed a remote attacker who convinced a user to engage in specific UI EPSS 1.1%CVE-2023-28223MEDIUMWindows Domain Name Service Remote Code Execution VulnerabilityEPSS 1.1%CVE-2026-33278CRITICALPossible arbitrary code execution during DNSSEC validationEPSS 1.1%CVE-2019-13721HIGHUse after free in PDFium in Google Chrome prior to 78.0.3904.87 allowed a remote attacker to potentially exploit heap corruption via a craftEPSS 1.1%CVE-2025-26687HIGHWin32k Elevation of Privilege VulnerabilityEPSS 1.1%CVE-2021-33391CRITICALAn issue in HTACG HTML Tidy v5.7.28 allows attacker to execute arbitrary code via the -g option of the CleanNode() function in gdoc.c.EPSS 1.1%CVE-2024-30086HIGHWindows Win32 Kernel Subsystem Elevation of Privilege VulnerabilityEPSS 1.1%CVE-2022-43649HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit PDF Reader 12.0.2.12465. User interaEPSS 1.1%CVE-2024-1284CRITICALUse after free in Mojo in Google Chrome prior to 121.0.6167.160 allowed a remote attacker to potentially exploit heap corruption via a craftEPSS 1.1%CVE-2020-25663—A call to ConformPixelInfo() in the SetImageAlphaChannel() routine of /MagickCore/channel.c caused a subsequent heap-use-after-free or heap-EPSS 1.1%CVE-2024-49115HIGHWindows Remote Desktop Services Remote Code Execution VulnerabilityEPSS 1.1%CVE-2023-30576MEDIUMApache Guacamole: Use-after-free in handling of RDP audio input bufferEPSS 1.1%CVE-2021-3455MEDIUMDisconnecting L2CAP channel right after invalid ATT request leads freezeEPSS 1.1%CVE-2022-0520HIGHUse After Free in radareorg/radare2EPSS 1.1%CVE-2017-14201—The shell DNS command can cause unpredictable results due to misuse of stack variables.EPSS 1.1%CVE-2024-49132HIGHWindows Remote Desktop Services Remote Code Execution VulnerabilityEPSS 1.1%