Weaknesses of type CWE-416

5,143 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-2024-57896HIGHbtrfs: flush delalloc workers queue before stopping cleaner kthread during unmountEPSS 0.2%CVE-2024-46973HIGHExploitable kernel use-after-free on psServerMMUContext due to reference count mismanagementEPSS 0.2%CVE-2024-7675HIGHDWFX File Parsing Vulnerabilities in Autodesk Navisworks Desktop SoftwareEPSS 0.2%CVE-2024-56619HIGHnilfs2: fix potential out-of-bounds memory access in nilfs_find_entry()EPSS 0.2%CVE-2025-8410MEDIUMUse After Free vulnerability in RTI Connext Professional (Security Plugins) allows File Manipulation.EPSS 0.2%CVE-2025-68617HIGHUse after free in fluidsynthEPSS 0.2%CVE-2025-20062HIGHUse after free for some Intel(R) PROSet/Wireless WiFi Software for Windows before version 23.100 may allow an unauthenticated user to potentEPSS 0.2%CVE-2023-28984MEDIUMJunos OS: QFX Series: The PFE may crash when a lot of MAC addresses are being learned and agedEPSS 0.2%CVE-2024-56652HIGHdrm/xe/reg_sr: Remove register poolEPSS 0.2%CVE-2024-56669HIGHiommu/vt-d: Remove cache tags before disabling ATSEPSS 0.2%CVE-2024-1065MEDIUMMali GPU Kernel Driver allows improper GPU memory processing operationsEPSS 0.2%CVE-2026-41982MEDIUMRace condition vulnerability in the IPC module. Impact: Successful exploitation of this vulnerability may affect availability.EPSS 0.2%CVE-2024-50293HIGHnet/smc: do not leave a dangling sk pointer in __smc_create()EPSS 0.2%CVE-2024-57857HIGHRDMA/siw: Remove direct link to net_deviceEPSS 0.2%CVE-2025-9394MEDIUMPoDoFo PDF Dictionary PdfTokenizer.cpp DetermineDataType use after freeEPSS 0.2%CVE-2023-53374HIGHBluetooth: hci_conn: fail SCO/ISO via hci_conn_failed if ACL gone earlyEPSS 0.2%CVE-2026-70582MEDIUMWindows Management Instrumentation Elevation of Privilege VulnerabilityEPSS 0.2%CVE-2024-53143HIGHfsnotify: Fix ordering of iput() and watched_objects decrementEPSS 0.2%CVE-2025-21631HIGHblock, bfq: fix waker_bfqq UAF after bfq_split_bfqq()EPSS 0.2%CVE-2021-41220HIGHUse after free in `CollectiveReduceV2`EPSS 0.2%