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-2021-44433—A vulnerability has been identified in JT Utilities (All versions < V13.1.1.0), JTTK (All versions < V11.1.1.0). JTTK library in affected prEPSS 0.9%CVE-2023-1533HIGHUse after free in WebProtect in Google Chrome prior to 111.0.5563.110 allowed a remote attacker to potentially exploit heap corruption via aEPSS 0.9%CVE-2023-28305MEDIUMWindows DNS Server Remote Code Execution VulnerabilityEPSS 0.9%CVE-2021-20292—There is a flaw reported in the Linux kernel in versions before 5.9 in drivers/gpu/drm/nouveau/nouveau_sgdma.c in nouveau_sgdma_create_ttm iEPSS 0.9%CVE-2023-28307MEDIUMWindows DNS Server Remote Code Execution VulnerabilityEPSS 0.9%CVE-2023-28306MEDIUMWindows DNS Server Remote Code Execution VulnerabilityEPSS 0.9%CVE-2023-28308MEDIUMWindows DNS Server Remote Code Execution VulnerabilityEPSS 0.9%CVE-2021-37202—A vulnerability has been identified in NX 1980 Series (All versions < V1984), Solid Edge SE2021 (All versions < SE2021MP8). The IFC adapter EPSS 0.9%CVE-2022-42720HIGHVarious refcounting bugs in the multi-BSS handling in the mac80211 stack in the Linux kernel 5.1 through 5.19.x before 5.19.16 could be usedEPSS 0.9%CVE-2023-2722HIGHUse after free in Autofill UI in Google Chrome on Android prior to 113.0.5672.126 allowed a remote attacker to potentially exploit heap corrEPSS 0.9%CVE-2022-26381HIGHAn attacker could have caused a use-after-free by forcing a text reflow in an SVG object leading to a potentially exploitable crash. This vuEPSS 0.8%CVE-2024-21384HIGHMicrosoft Office OneNote Remote Code Execution VulnerabilityEPSS 0.8%CVE-2025-55326HIGHWindows Connected Devices Platform Service (Cdpsvc) Remote Code Execution VulnerabilityEPSS 0.8%CVE-2026-33630HIGHc-ares : Use-after-free / double-free in c-ares query-completion handling, remotely triggerable via ares_getaddrinfo() over TCPEPSS 0.8%CVE-2024-30366HIGHFoxit PDF Reader AcroForm Use-After-Free Remote Code Execution VulnerabilityEPSS 0.8%CVE-2024-0193HIGHKernel: netfilter: use-after-free in nft_trans_gc_catchall_sync leads to privilege escalationEPSS 0.8%CVE-2025-21394HIGHMicrosoft Excel Remote Code Execution VulnerabilityEPSS 0.8%CVE-2025-21386HIGHMicrosoft Excel Remote Code Execution VulnerabilityEPSS 0.8%CVE-2025-21392HIGHMicrosoft Office Remote Code Execution VulnerabilityEPSS 0.8%CVE-2022-3885HIGHUse after free in V8 in Google Chrome prior to 107.0.5304.106 allowed a remote attacker to potentially exploit heap corruption via a craftedEPSS 0.8%