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-2023-5174CRITICALIf Windows failed to duplicate a handle during process creation, the sandbox code may have inadvertently freed a pointer twice, resulting inEPSS 1.0%CVE-2022-4283HIGHA vulnerability was found in X.Org. This security flaw occurs because the XkbCopyNames function left a dangling pointer to freed memory, resEPSS 1.0%CVE-2022-1031HIGHUse After Free in op_is_set_bp in radareorg/radare2EPSS 1.0%CVE-2024-49079HIGHInput Method Editor (IME) Remote Code Execution VulnerabilityEPSS 1.0%CVE-2026-78523MEDIUMWindows DNS Server Denial of Service VulnerabilityEPSS 1.0%CVE-2022-34484HIGHThe Mozilla Fuzzing Team reported potential vulnerabilities present in Thunderbird 91.10. Some of these bugs showed evidence of memory corruEPSS 1.0%CVE-2023-20027HIGHCisco IOS XE Software Virtual Fragmentation Reassembly Denial of Service VulnerabilityEPSS 1.0%CVE-2024-3914HIGHUse after free in V8 in Google Chrome prior to 124.0.6367.60 allowed a remote attacker to potentially exploit heap corruption via a crafted EPSS 1.0%CVE-2024-40782CRITICALA use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 17.6, iOS 16.7.9 and iPadOS 16.7.9, iOS EPSS 1.0%CVE-2023-36583HIGHMicrosoft Message Queuing (MSMQ) Remote Code Execution VulnerabilityEPSS 1.0%CVE-2022-2982HIGHUse After Free in vim/vimEPSS 1.0%CVE-2026-73010CRITICALMicrosoft Failover Cluster Remote Code Execution VulnerabilityEPSS 1.0%CVE-2026-62815CRITICALMicrosoft QUIC Remote Code Execution VulnerabilityEPSS 1.0%CVE-2023-25360HIGHA use-after-free vulnerability in WebCore::RenderLayer::renderer in WebKitGTK before 2.36.8 allows attackers to execute code remotely.EPSS 1.0%CVE-2026-72979CRITICALWindows DHCP Server Remote Code Execution VulnerabilityEPSS 1.0%CVE-2026-69730CRITICALWindows DNS Server Remote Code Execution VulnerabilityEPSS 1.0%CVE-2026-69525CRITICALRemote Desktop Services Remote Code Execution VulnerabilityEPSS 1.0%CVE-2026-45657CRITICALWindows Kernel Remote Code Execution VulnerabilityEPSS 1.0%CVE-2026-69595CRITICALWindows Services for NFS ONCRPC XDR Driver Remote Code Execution VulnerabilityEPSS 1.0%CVE-2026-78445CRITICALWindows Services for NFS ONCRPC XDR Driver Remote Code Execution VulnerabilityEPSS 1.0%