Weaknesses of type CWE-416

5,126 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-2026-92029HIGHUse-after-free in the SVG componentEPSS 0.3%CVE-2021-34969LOWFoxit PDF Reader Annotation Use-After-Free Information Disclosure VulnerabilityEPSS 0.3%CVE-2021-34976LOWFoxit PDF Reader PDF File Parsing Use-After-Free Information Disclosure VulnerabilityEPSS 0.3%CVE-2026-92022HIGHUse-after-free in the DOM: HTML Parser componentEPSS 0.3%CVE-2026-92025HIGHUse-after-free in the DOM: Navigation componentEPSS 0.3%CVE-2026-78227MEDIUMUse-after-free in DoQ stream output buffer on reset re-transmissionEPSS 0.3%CVE-2026-92027HIGHUse-after-free in the DOM: Streams componentEPSS 0.3%CVE-2021-34972LOWFoxit PDF Reader AcroForm Use-After-Free Information Disclosure VulnerabilityEPSS 0.3%CVE-2026-92024HIGHUse-after-free in the SVG componentEPSS 0.3%CVE-2025-1046HIGHLuxion KeyShot SKP File Parsing Use-After-Free Remote Code Execution VulnerabilityEPSS 0.3%CVE-2026-92028HIGHUse-after-free in the DOM: Core & HTML componentEPSS 0.3%CVE-2021-34973LOWFoxit PDF Reader PDF File Parsing Use-After-Free Information Disclosure VulnerabilityEPSS 0.3%CVE-2026-91729CRITICALUse after free in DigitalCredentials in Google Chrome prior to 153.0.8010.47 allowed a remote attacker leveraging social engineering to execEPSS 0.3%CVE-2024-57995HIGHwifi: ath12k: fix read pointer after free in ath12k_mac_assign_vif_to_vdev()EPSS 0.3%CVE-2026-55000MEDIUMWindows USB Print Driver Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-43716MEDIUMThe issue was addressed with improved memory handling. This issue is fixed in Safari 26.5.2, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.EPSS 0.3%CVE-2025-49685HIGHWindows Search Service Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-91737HIGHUse after free in PDF in Google Chrome prior to 153.0.8010.47 allowed a remote attacker to execute arbitrary code inside the sandbox via a cEPSS 0.3%CVE-2026-91736HIGHUse after free in DOM in Google Chrome prior to 153.0.8010.47 allowed a remote attacker to execute arbitrary code inside the sandbox via a cEPSS 0.3%CVE-2026-91745HIGHUse after free in V8 in Google Chrome prior to 153.0.8010.47 allowed a remote attacker to execute arbitrary code inside the sandbox via a crEPSS 0.3%