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-2024-43509HIGHWindows Graphics Component Elevation of Privilege VulnerabilityEPSS 0.6%CVE-2025-62559HIGHMicrosoft Word Remote Code Execution VulnerabilityEPSS 0.6%CVE-2025-62558HIGHMicrosoft Word Remote Code Execution VulnerabilityEPSS 0.6%CVE-2024-6988HIGHUse after free in Downloads in Google Chrome on iOS prior to 127.0.6533.72 allowed a remote attacker to potentially exploit heap corruption EPSS 0.6%CVE-2025-21762HIGHarp: use RCU protection in arp_xmit()EPSS 0.6%CVE-2026-67299HIGHFreeRDP before 3.29.0 Use-After-Free via WindowIcon async messageEPSS 0.6%CVE-2026-43812CRITICALA use after free issue was addressed with improved memory management. This issue is fixed in iOS 18.7.10 and iPadOS 18.7.10, iOS 26.6 and iPEPSS 0.6%CVE-2024-53206CRITICALtcp: Fix use-after-free of nreq in reqsk_timer_handler().EPSS 0.6%CVE-2023-33149HIGHMicrosoft Office Graphics Remote Code Execution VulnerabilityEPSS 0.6%CVE-2025-27730HIGHWindows Digital Media Elevation of Privilege VulnerabilityEPSS 0.6%CVE-2025-27476HIGHWindows Digital Media Elevation of Privilege VulnerabilityEPSS 0.6%CVE-2025-27467HIGHWindows Digital Media Elevation of Privilege VulnerabilityEPSS 0.6%CVE-2022-49093CRITICALskbuff: fix coalescing for page_pool fragment recyclingEPSS 0.6%CVE-2022-40133MEDIUMThere is an UAF vulnerability in vmwgfx driverEPSS 0.6%CVE-2020-25669—A vulnerability was found in the Linux Kernel where the function sunkbd_reinit having been scheduled by sunkbd_interrupt before sunkbd beingEPSS 0.6%CVE-2022-45407HIGHIf an attacker loaded a font using <code>FontFace()</code> on a background worker, a use-after-free could have occurred, leading to a potentEPSS 0.6%CVE-2024-34094HIGHZDI-CAN-23474: Adobe Acrobat Reader DC Annotation Use-After-Free Remote Code Execution VulnerabilityEPSS 0.6%CVE-2024-50283CRITICALksmbd: fix slab-use-after-free in smb3_preauth_hash_rspEPSS 0.6%CVE-2024-6293HIGHUse after free in Dawn in Google Chrome prior to 126.0.6478.126 allowed a remote attacker to potentially exploit heap corruption via a craftEPSS 0.6%CVE-2024-6290HIGHUse after free in Dawn in Google Chrome prior to 126.0.6478.126 allowed a remote attacker to potentially exploit heap corruption via a craftEPSS 0.6%