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-2021-39216MEDIUMUse after free passing `externref`s to Wasm in WasmtimeEPSS 0.3%CVE-2026-16851HIGHVulnerabilities in IBM AIX and PowerVM VIOSEPSS 0.3%CVE-2026-11683HIGHUse after free in WebCodecs in Google Chrome prior to 149.0.7827.103 allowed a remote attacker to execute arbitrary code inside a sandbox viEPSS 0.3%CVE-2026-20924HIGHWindows Management Services Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2023-1872HIGHUse-after-free in Linux kernel's io_uring subsystemEPSS 0.3%CVE-2026-13880CRITICALUse after free in USB in Google Chrome on Mac prior to 150.0.7871.47 allowed a remote attacker who had compromised the renderer process to pEPSS 0.3%CVE-2026-13861CRITICALUse after free in Core in Google Chrome prior to 150.0.7871.47 allowed a remote attacker who had compromised the renderer process to potentiEPSS 0.3%CVE-2026-14113CRITICALUse after free in Updater in Google Chrome on Windows prior to 150.0.7871.47 allowed a remote attacker who had compromised the renderer procEPSS 0.3%CVE-2026-13853CRITICALUse after free in Journeys in Google Chrome prior to 150.0.7871.47 allowed a remote attacker who had compromised the renderer process to potEPSS 0.3%CVE-2020-14351—A flaw was found in the Linux kernel. A use-after-free memory flaw was found in the perf subsystem allowing a local attacker with permissionEPSS 0.3%CVE-2026-5290CRITICALUse after free in Compositing in Google Chrome prior to 146.0.7680.178 allowed a remote attacker who had compromised the renderer process toEPSS 0.3%CVE-2026-6360HIGHUse after free in FileSystem in Google Chrome prior to 147.0.7727.101 allowed a remote attacker to potentially exploit object corruption viaEPSS 0.3%CVE-2026-12298MEDIUMMemory safety bug fixed in Firefox 152EPSS 0.3%CVE-2026-5289CRITICALUse after free in Navigation in Google Chrome prior to 146.0.7680.178 allowed a remote attacker who had compromised the renderer process to EPSS 0.3%CVE-2026-7908CRITICALUse after free in Fullscreen in Google Chrome prior to 148.0.7778.96 allowed a remote attacker to potentially perform a sandbox escape via aEPSS 0.3%CVE-2026-13854CRITICALUse after free in Ozone in Google Chrome on Linux prior to 150.0.7871.47 allowed a remote attacker who had compromised the renderer process EPSS 0.3%CVE-2026-5288CRITICALUse after free in WebView in Google Chrome on Android prior to 146.0.7680.178 allowed a remote attacker who had compromised the renderer proEPSS 0.3%CVE-2025-3620HIGHUse after free in USB in Google Chrome prior to 135.0.7049.95 allowed a remote attacker to potentially exploit heap corruption via a craftedEPSS 0.3%CVE-2026-13878CRITICALUse after free in Bluetooth in Google Chrome on Mac prior to 150.0.7871.47 allowed a remote attacker who had compromised the renderer procesEPSS 0.3%CVE-2026-11117HIGHUse after free in Views in Google Chrome on Windows prior to 149.0.7827.53 allowed a remote attacker to execute arbitrary code via a craftedEPSS 0.3%