Weaknesses of type CWE-416

5,134 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-2026-54901MEDIUMOj: Use-After-Free in Oj::Parser array_class/hash_class GC MarkingEPSS 0.3%CVE-2026-32152HIGHDesktop Window Manager Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-45593HIGHWindows SDK Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-100776HIGHUse-after-free in the JavaScript: WebAssembly componentEPSS 0.3%CVE-2026-40418HIGHMicrosoft Office Click-To-Run Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-40419HIGHMicrosoft Office Click-To-Run Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-50326HIGHWindows Unified Consent System Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-58537HIGHMicrosoft NAT Helper Components (ipnathlp.dll) Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-58634HIGHDesktop Window Manager Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-27923HIGHDesktop Window Manager Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-82056MEDIUMRace Condition in MongoDB Server Text Index Query Parsing Leads to Heap Use-After-Free and Denial of ServiceEPSS 0.3%CVE-2024-2410HIGHUse after free in C++ protobufEPSS 0.3%CVE-2026-86096MEDIUMPX4 Autopilot through 1.17.0 Use-After-Free via Temperature Calibration Task StartupEPSS 0.3%CVE-2026-91718CRITICALUse after free in Core in Google Chrome prior to 153.0.8010.47 allowed a remote attacker to execute arbitrary code outside the sandbox via aEPSS 0.3%CVE-2026-68820HIGHWindows Ancillary Function Driver for WinSock Elevation of Privilege VulnerabilityEPSS 0.3%KEVCVE-2024-8394MEDIUMWhen aborting the verification of an OTR chat session, an attacker could have caused a use-after-free bug leading to a potentially exploitabEPSS 0.3%CVE-2025-3631MEDIUMIBM MQ denial of serviceEPSS 0.3%CVE-2026-4449HIGHUse after free in Blink in Google Chrome prior to 146.0.7680.153 allowed a remote attacker to potentially exploit heap corruption via a crafEPSS 0.3%CVE-2026-12439HIGHUse after free in Digital Credentials in Google Chrome prior to 149.0.7827.155 allowed a remote attacker to potentially exploit heap corruptEPSS 0.3%CVE-2026-4446HIGHUse after free in WebRTC in Google Chrome prior to 146.0.7680.153 allowed a remote attacker to potentially exploit heap corruption via a craEPSS 0.3%