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-2025-1931HIGHUse-after-free in WebTransportChildEPSS 0.5%CVE-2023-38112HIGHFoxit PDF Reader XFA Annotation Use-After-Free Remote Code Execution VulnerabilityEPSS 0.5%CVE-2026-27925MEDIUMWindows UPnP Device Host Information Disclosure VulnerabilityEPSS 0.5%CVE-2026-4723CRITICALUse-after-free in the JavaScript Engine componentEPSS 0.5%CVE-2024-4777HIGHMemory safety bugs present in Firefox 125, Firefox ESR 115.10, and Thunderbird 115.10. Some of these bugs showed evidence of memory corruptiEPSS 0.5%CVE-2021-4322HIGHUse after free in DevTools in Google Chrome prior to 91.0.4472.77 allowed an attacker who convinced a user to install a malicious extension EPSS 0.5%CVE-2020-1752HIGHA use-after-free vulnerability introduced in glibc upstream version 2.14 was found in the way the tilde expansion was carried out. DirectoryEPSS 0.5%CVE-2026-20952HIGHMicrosoft Office Remote Code Execution VulnerabilityEPSS 0.5%CVE-2023-4750HIGHUse After Free in vim/vimEPSS 0.5%CVE-2026-82619MEDIUMSysterel S2OPC subscription_mgr.c use after freeEPSS 0.5%CVE-2026-79027HIGHUse after free in WebRTC in Google Chrome prior to 152.0.7977.65 allowed a remote attacker to execute arbitrary code inside the sandbox via EPSS 0.5%CVE-2026-76040HIGHUse after free in Browser in Google Chrome on on Mac prior to 151.0.7922.169 allowed a remote attacker leveraging social engineering to execEPSS 0.5%CVE-2025-24072HIGHMicrosoft Local Security Authority (LSA) Server Elevation of Privilege VulnerabilityEPSS 0.5%CVE-2026-6785HIGHMemory safety bugs fixed in Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150EPSS 0.5%CVE-2025-15269HIGHFontForge SFD File Parsing Use-After-Free Remote Code Execution VulnerabilityEPSS 0.5%CVE-2026-6786HIGHMemory safety bugs fixed in Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150EPSS 0.5%CVE-2025-24046HIGHKernel Streaming Service Driver Elevation of Privilege VulnerabilityEPSS 0.5%CVE-2023-27348HIGHPDF-XChange Editor TIF File Parsing Use-After-Free Remote Code Execution VulnerabilityEPSS 0.5%CVE-2023-35828HIGHAn issue was discovered in the Linux kernel before 6.3.2. A use-after-free was found in renesas_usb3_remove in drivers/usb/gadget/udc/renesaEPSS 0.5%CVE-2022-2946HIGHUse After Free in vim/vimEPSS 0.5%