Weaknesses of type CWE-416

5,138 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-2026-54129HIGHWindows Hyper-V Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-54989HIGHQuality Windows Audio/Video Experience (QWAVE) Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-50490HIGHWindows Installer Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-50476HIGHWindows Network Connections Service Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-50396HIGHWindows Kernel-Mode Driver Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-50688HIGHWindows Win32k Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-50307HIGHWindows TCP/IP Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-56187HIGHWindows MIDI Service Module Elevation of Privileges VulnerabilityEPSS 0.3%CVE-2026-57093HIGHWindows Ancillary Function Driver for WinSock Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-50358HIGHWindows Media Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-50406HIGHWindows Backup Engine Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2022-49085HIGHdrbd: Fix five use after free bugs in get_initial_stateEPSS 0.3%CVE-2026-50674HIGHWindows USB Print Driver Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-50393HIGHWindows Kernel-Mode Driver Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-43499HIGHrtmutex: Use waiter::task instead of current in remove_waiter()EPSS 0.3%CVE-2026-11030HIGHUse after free in Network in Google Chrome prior to 149.0.7827.53 allowed a remote attacker to potentially exploit heap corruption via malicEPSS 0.3%CVE-2026-7910MEDIUMUse after free in Views in Google Chrome prior to 148.0.7778.96 allowed a remote attacker who had compromised the renderer process to bypassEPSS 0.3%CVE-2024-53227HIGHscsi: bfa: Fix use-after-free in bfad_im_module_exit()EPSS 0.3%CVE-2023-52983HIGHblock, bfq: fix uaf for bfqq in bic_set_bfqq()EPSS 0.3%CVE-2026-21237HIGHWindows Subsystem for Linux Elevation of Privilege VulnerabilityEPSS 0.3%