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-2026-27854MEDIUMUse after free when parsing EDNS options in LuaEPSS 1.3%CVE-2026-4271MEDIUMLibsoup: libsoup: denial of service via use-after-free in http/2 serverEPSS 1.3%CVE-2022-2526—A use-after-free vulnerability was found in systemd. This issue occurs due to the on_stream_io() function and dns_stream_complete() functionEPSS 1.3%CVE-2019-5053HIGHAn exploitable use-after-free vulnerability exists in the Length parsing function of NitroPDF. A specially crafted PDF can cause a type confEPSS 1.3%CVE-2019-5047HIGHAn exploitable Use After Free vulnerability exists in the CharProcs parsing functionality of NitroPDF. A specially crafted PDF can cause a tEPSS 1.3%CVE-2021-32781HIGHContinued processing of requests after locally generated responseEPSS 1.3%CVE-2022-0699CRITICALA double-free condition exists in contrib/shpsort.c of shapelib 1.5.0 and older releases. This issue may allow an attacker to cause a denialEPSS 1.3%CVE-2024-24266HIGHgpac v2.2.1 was discovered to contain a Use-After-Free (UAF) vulnerability via the dasher_configure_pid function at /src/filters/dasher.c.EPSS 1.3%CVE-2022-22624HIGHA use after free issue was addressed with improved memory management. This issue is fixed in macOS Monterey 12.3, iOS 15.4 and iPadOS 15.4, EPSS 1.3%CVE-2022-22628HIGHA use after free issue was addressed with improved memory management. This issue is fixed in macOS Monterey 12.3, Safari 15.4, watchOS 8.5, EPSS 1.3%CVE-2023-38169HIGHMicrosoft SQL OLE DB Remote Code Execution VulnerabilityEPSS 1.3%CVE-2022-34707HIGHWindows Kernel Elevation of Privilege VulnerabilityEPSS 1.3%CVE-2025-47957HIGHMicrosoft Word Remote Code Execution VulnerabilityEPSS 1.3%CVE-2020-7827HIGHDaviewIndy Use-After-Free VulnerabilityEPSS 1.3%CVE-2024-36886CRITICALtipc: fix UAF in error pathEPSS 1.3%CVE-2023-3269HIGHDistros-[dirtyvma] privilege escalation via non-rcu-protected vma traversalEPSS 1.3%CVE-2023-5218HIGHUse after free in Site Isolation in Google Chrome prior to 118.0.5993.70 allowed a remote attacker to potentially exploit heap corruption viEPSS 1.3%CVE-2025-24252HIGHA use-after-free issue was addressed with improved memory management. This issue is fixed in iOS 18.4 and iPadOS 18.4, iPadOS 17.7.6, macOS EPSS 1.3%CVE-2026-6722CRITICALUse-After-Free in SOAP using Apache mapEPSS 1.3%CVE-2021-4069HIGHUse After Free in vim/vimEPSS 1.3%