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-2026-50505HIGHWindows Message Queuing Service (MSMQ) Remote Code Execution VulnerabilityEPSS 0.7%CVE-2023-28287HIGHMicrosoft Publisher Remote Code Execution VulnerabilityEPSS 0.7%CVE-2023-31566HIGHPodofo v0.10.0 was discovered to contain a heap-use-after-free via the component PoDoFo::PdfEncrypt::IsMetadataEncrypted().EPSS 0.7%CVE-2023-52266HIGHehttp 1.0.6 before 17405b9 has an epoll_socket.cpp read_func use-after-free. An attacker can make many connections over a short time to trigEPSS 0.7%CVE-2024-0746MEDIUMA Linux user opening the print preview dialog could have caused the browser to crash. This vulnerability affects Firefox < 122, Firefox ESR EPSS 0.7%CVE-2026-67863HIGHIn open62541 1.5.5, a server-side use-after-free exists in the local MonitoredItem callback path. The issue occurs when UA_Subscription_locaEPSS 0.7%CVE-2023-0471HIGHUse after free in WebTransport in Google Chrome prior to 109.0.5414.119 allowed a remote attacker to potentially exploit heap corruption viaEPSS 0.7%CVE-2024-26241HIGHWin32k Elevation of Privilege VulnerabilityEPSS 0.7%CVE-2022-23584HIGHUse after free in `DecodePng` in TensorflowEPSS 0.7%CVE-2024-22088CRITICALLotos WebServer through 0.1.1 (commit 3eb36cc) has a use-after-free in buffer_avail() at buffer.h via a long URI, because realloc is mishandEPSS 0.7%CVE-2025-60467HIGHA use-after-free in the gf_filter_pid_inst_swap_delete_task function (/filter_core/filter_pid.c) of GPAC Project/MP4Box before 26.02.0 allowEPSS 0.7%CVE-2024-5498MEDIUMUse after free in Presentation API in Google Chrome prior to 125.0.6422.141 allowed a remote attacker to potentially exploit heap corruptionEPSS 0.7%CVE-2023-50716CRITICALInvalid DATA_FRAG Submessage causes a bad-free errorEPSS 0.7%CVE-2026-69530HIGHWindows Reliable Multicast Transport Driver (RMCAST) Remote Code Execution VulnerabilityEPSS 0.7%CVE-2023-21735HIGHMicrosoft Office Remote Code Execution VulnerabilityEPSS 0.7%CVE-2026-77505HIGHWindows DNS Server Remote Code Execution VulnerabilityEPSS 0.7%CVE-2026-69546HIGHWindows Active Directory Domain Services Remote Code Execution VulnerabilityEPSS 0.7%CVE-2026-69524HIGHWindows Active Directory Domain Services Remote Code Execution VulnerabilityEPSS 0.7%CVE-2022-45748HIGHAn issue was discovered with assimp 5.1.4, a use after free occurred in function ColladaParser::ExtractDataObjectFromChannel in file /code/AEPSS 0.7%CVE-2023-51598HIGHHancom Office Word DOC File Parsing Use-After-Free Remote Code Execution VulnerabilityEPSS 0.7%