Weaknesses of type CWE-416

5,142 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-2026-12310HIGHMemory safety bug fixed in Firefox 152EPSS 0.3%CVE-2026-11654CRITICALUse after free in CameraCapture in Google Chrome on Mac prior to 149.0.7827.103 allowed a remote attacker to potentially perform a sandbox eEPSS 0.3%CVE-2022-3977HIGHA use-after-free flaw was found in the Linux kernel MCTP (Management Component Transport Protocol) functionality. This issue occurs when a uEPSS 0.3%CVE-2025-12438HIGHUse after free in Ozone in Google Chrome on Linux and ChromeOS prior to 142.0.7444.59 allowed a remote attacker to potentially exploit objecEPSS 0.3%CVE-2026-11638CRITICALUse after free in Printing in Google Chrome prior to 149.0.7827.103 allowed a remote attacker to potentially perform a sandbox escape via a EPSS 0.3%CVE-2022-49082HIGHscsi: mpt3sas: Fix use after free in _scsih_expander_node_remove()EPSS 0.3%CVE-2020-22429HIGHredox-os v0.1.0 was discovered to contain a use-after-free bug via the gethostbyaddr() function at /src/header/netdb/mod.rs.EPSS 0.3%CVE-2026-4458HIGHUse after free in Extensions in Google Chrome prior to 146.0.7680.153 allowed an attacker who convinced a user to install a malicious extensEPSS 0.3%CVE-2026-2321HIGHUse after free in Ozone in Google Chrome prior to 145.0.7632.45 allowed a remote attacker who convinced a user to engage in specific UI gestEPSS 0.3%CVE-2025-59195HIGHWindows Graphics Component Denial of Service VulnerabilityEPSS 0.3%CVE-2024-50280HIGHdm cache: fix flushing uninitialized delayed_work on cache_ctr errorEPSS 0.3%CVE-2024-57926HIGHdrm/mediatek: Set private->all_drm_private[i]->drm to NULL if mtk_drm_bind returns errEPSS 0.3%CVE-2023-4295HIGHMali GPU Kernel Driver allows improper GPU memory processing operationsEPSS 0.3%CVE-2026-12440CRITICALUse after free in DigitalCredentials in Google Chrome on Windows prior to 149.0.7827.155 allowed a remote attacker to potentially perform a EPSS 0.3%CVE-2026-11941MEDIUMUse-after-free in connection ID iterator and FFI functionsEPSS 0.3%CVE-2025-8176MEDIUMLibTIFF tiffmedian.c get_histogram use after freeEPSS 0.3%CVE-2023-1838—A use-after-free flaw was found in vhost_net_set_backend in drivers/vhost/net.c in virtio network subcomponent in the Linux kernel due to a EPSS 0.3%CVE-2023-33250MEDIUMThe Linux kernel 6.3 has a use-after-free in iopt_unmap_iova_range in drivers/iommu/iommufd/io_pagetable.c.EPSS 0.3%CVE-2023-2235HIGHUse-after-free in Linux kernel's Performance Events subsystemEPSS 0.3%CVE-2022-2979HIGHOmron CX-ProgrammerEPSS 0.3%