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-2021-3543—A flaw null pointer dereference in the Nitro Enclaves kernel driver was found in the way that Enclaves VMs forces closures on the enclave fiEPSS 0.3%CVE-2025-48000HIGHWindows Connected Devices Platform Service Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2025-22035HIGHtracing: Fix use-after-free in print_graph_function_flags during tracer switchingEPSS 0.3%CVE-2025-64183MEDIUMOpenEXR has use after free in PyObject_StealAttrStringEPSS 0.3%CVE-2024-9732HIGHTungsten Automation Power PDF XPS File Parsing Use-After-Free Remote Code Execution VulnerabilityEPSS 0.3%CVE-2024-45107MEDIUMZDI-CAN-24186: Adobe Acrobat Reader DC Doc Object Use-After-Free Information Disclosure VulnerabilityEPSS 0.3%CVE-2024-9715HIGHTrimble SketchUp Viewer SKP File Parsing Use-After-Free Remote Code Execution VulnerabilityEPSS 0.3%CVE-2022-49291HIGHALSA: pcm: Fix races among concurrent hw_params and hw_free callsEPSS 0.3%CVE-2024-9716HIGHTrimble SketchUp Viewer SKP File Parsing Use-After-Free Remote Code Execution VulnerabilityEPSS 0.3%CVE-2024-9719HIGHTrimble SketchUp Viewer SKP File Parsing Use-After-Free Remote Code Execution VulnerabilityEPSS 0.3%CVE-2026-49171HIGHWindows Speech Runtime Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-60002HIGHssh in OpenSSH before 10.4 can have a use-after-free when a server changes its host key during a key re-exchange. (This outcome occurs only EPSS 0.3%CVE-2026-23667HIGHBroadcast DVR Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2025-2013HIGHAshlar-Vellum Cobalt CO File Parsing Use-After-Free Remote Code Execution VulnerabilityEPSS 0.3%CVE-2026-12437HIGHUse after free in WebShare in Google Chrome on Windows prior to 149.0.7827.155 allowed a remote attacker who had compromised the renderer prEPSS 0.3%CVE-2026-10637MEDIUMUse-after-free of `net_pkt` in IPv6 MLD send path triggerable by a link-local MLD QueryEPSS 0.3%CVE-2026-10919HIGHUse after free in ANGLE in Google Chrome prior to 149.0.7827.53 allowed a remote attacker who had compromised the renderer process to potentEPSS 0.3%CVE-2022-3176HIGHUse-after-free in io_uring in Linux KernelEPSS 0.3%CVE-2026-25167HIGHMicrosoft Brokering File System Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2023-52975HIGHscsi: iscsi_tcp: Fix UAF during logout when accessing the shost ipaddressEPSS 0.3%