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-2025-15280HIGHFontForge SFD File Parsing Use-After-Free Remote Code Execution VulnerabilityEPSS 0.6%CVE-2025-59282HIGHInternet Information Services (IIS) Inbox COM Objects (Global Memory) Remote Code Execution VulnerabilityEPSS 0.6%CVE-2026-57992HIGHMicrosoft Edge (Chromium-based) Remote Code Execution VulnerabilityEPSS 0.6%CVE-2026-57986HIGHMicrosoft Edge (Chromium-based) Remote Code Execution VulnerabilityEPSS 0.6%CVE-2026-69607HIGHWindows Deployment Services Remote Code Execution VulnerabilityEPSS 0.6%CVE-2026-58287HIGHMicrosoft Edge (Chromium-based) Remote Code Execution VulnerabilityEPSS 0.6%CVE-2026-44801HIGHRemote Desktop Client Remote Code Execution VulnerabilityEPSS 0.6%CVE-2026-58288HIGHMicrosoft Edge (Chromium-based) Remote Code Execution VulnerabilityEPSS 0.6%CVE-2026-69397HIGHMicrosoft OpenSSH for Windows Remote Code Execution VulnerabilityEPSS 0.6%CVE-2026-57984HIGHMicrosoft Edge (Chromium-based) Remote Code Execution VulnerabilityEPSS 0.6%CVE-2026-47654HIGHRemote Desktop Client Remote Code Execution VulnerabilityEPSS 0.6%CVE-2026-48563HIGHRemote Desktop Client Remote Code Execution VulnerabilityEPSS 0.6%CVE-2026-66315HIGHMicrosoft Edge (Chromium-based) Remote Code Execution VulnerabilityEPSS 0.6%CVE-2026-58294HIGHMicrosoft Edge (Chromium-based) Remote Code Execution VulnerabilityEPSS 0.6%CVE-2026-58276HIGHMicrosoft Edge (Chromium-based) Remote Code Execution VulnerabilityEPSS 0.6%CVE-2024-7527HIGHUnexpected marking work at the start of sweeping could have led to a use-after-free. This vulnerability affects Firefox < 129, Firefox ESR <EPSS 0.6%CVE-2024-36844HIGHlibmodbus v3.1.6 was discovered to contain a use-after-free via the ctx->backend pointer. This vulnerability allows attackers to cause a DenEPSS 0.6%CVE-2026-74940CRITICALUse-after-free in the Graphics: Text componentEPSS 0.6%CVE-2026-74943CRITICALUse-after-free in the Graphics: ImageLib componentEPSS 0.6%CVE-2025-21281HIGHMicrosoft COM for Windows Elevation of Privilege VulnerabilityEPSS 0.6%