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-2023-5476HIGHUse after free in Blink History in Google Chrome prior to 118.0.5993.70 allowed a remote attacker to potentially exploit heap corruption viaEPSS 0.9%CVE-2023-2721HIGHUse after free in Navigation in Google Chrome prior to 113.0.5672.126 allowed a remote attacker to potentially exploit heap corruption via aEPSS 0.9%CVE-2022-37382LOWThis vulnerability allows remote attackers to disclose sensitive information on affected installations of Foxit PDF Reader 11.2.1.53537. UseEPSS 0.9%CVE-2022-37379LOWThis vulnerability allows remote attackers to disclose sensitive information on affected installations of Foxit PDF Reader 11.2.1.53537. UseEPSS 0.9%CVE-2022-34705HIGHWindows Defender Credential Guard Elevation of Privilege VulnerabilityEPSS 0.9%CVE-2022-48340HIGHIn Gluster GlusterFS 11.0, there is an xlators/cluster/dht/src/dht-common.c dht_setxattr_mds_cbk use-after-free.EPSS 0.9%CVE-2023-35734LOWSante DICOM Viewer Pro DCM File Parsing Use-After-Free Information Disclosure VulnerabilityEPSS 0.9%CVE-2023-37117CRITICALA heap-use-after-free vulnerability was found in live555 version 2023.05.10 while handling the SETUP.EPSS 0.9%CVE-2021-41043—Use after free in tcpslice triggers AddressSanitizer, no other confirmed impact.EPSS 0.9%CVE-2024-34161MEDIUMNGINX HTTP/3 QUIC vulnerabilityEPSS 0.9%CVE-2025-11234HIGHQemu-kvm: vnc websocket handshake use-after-freeEPSS 0.9%CVE-2025-27746HIGHMicrosoft Office Remote Code Execution VulnerabilityEPSS 0.9%CVE-2025-27750HIGHMicrosoft Excel Remote Code Execution VulnerabilityEPSS 0.9%CVE-2024-49032HIGHMicrosoft Office Graphics Remote Code Execution VulnerabilityEPSS 0.9%CVE-2018-10879MEDIUMA flaw was found in the Linux kernel's ext4 filesystem. A local user can cause a use-after-free in ext4_xattr_set_entry function and a deniaEPSS 0.9%CVE-2023-4358HIGHUse after free in DNS in Google Chrome prior to 116.0.5845.96 allowed a remote attacker to potentially exploit heap corruption via a craftedEPSS 0.9%CVE-2024-38066HIGHWindows Win32k Elevation of Privilege VulnerabilityEPSS 0.9%CVE-2024-5702HIGHMemory corruption in the networking stack could have led to a potentially exploitable crash. This vulnerability affects Firefox < 125, FirefEPSS 0.9%CVE-2021-44447—A vulnerability has been identified in JT Utilities (All versions < V13.0.3.0), JTTK (All versions < V11.0.3.0). JTTK library in affected prEPSS 0.9%CVE-2025-3028MEDIUMUse-after-free triggered by XSLTProcessorEPSS 0.9%