Weaknesses of type CWE-416

5,138 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-2026-11649HIGHUse after free in V8 in Google Chrome prior to 149.0.7827.103 allowed a remote attacker to execute arbitrary code inside a sandbox via a craEPSS 0.3%CVE-2021-3700—A use-after-free vulnerability was found in usbredir in versions prior to 0.11.0 in the usbredirparser_serialize() in usbredirparser/usbrediEPSS 0.3%CVE-2024-8818HIGHPDF-XChange Editor U3D File Parsing Use-After-Free Remote Code Execution VulnerabilityEPSS 0.3%CVE-2021-4028—A flaw in the Linux kernel's implementation of RDMA communications manager listener code allowed an attacker with local access to setup a soEPSS 0.3%CVE-2024-9764HIGHTungsten Automation Power PDF PDF File Parsing Use-After-Free Remote Code Execution VulnerabilityEPSS 0.3%CVE-2022-49479HIGHmt76: fix tx status related use-after-free race on station removalEPSS 0.3%CVE-2022-49470HIGHBluetooth: btmtksdio: fix use-after-free at btmtksdio_recv_eventEPSS 0.3%CVE-2022-43651HIGHBentley View SKP File Parsing Use-After-Free Remote Code Execution VulnerabilityEPSS 0.3%CVE-2026-20644MEDIUMThe issue was addressed with improved memory handling. This issue is fixed in Safari 26.3, iOS 18.7.5 and iPadOS 18.7.5, iOS 26.3 and iPadOSEPSS 0.3%CVE-2026-12329MEDIUMMemory safety bug fixed in Thunderbird ESR 140.12EPSS 0.3%CVE-2026-10952HIGHUse after free in Chrome for iOS in Google Chrome on iOS prior to 149.0.7827.53 allowed a remote attacker to potentially exploit heap corrupEPSS 0.3%CVE-2022-49063HIGHice: arfs: fix use-after-free when freeing @rx_cpu_rmapEPSS 0.3%CVE-2020-27835—A use after free in the Linux kernel infiniband hfi1 driver in versions prior to 5.10-rc6 was found in the way user calls Ioctl after open dEPSS 0.3%CVE-2026-10951HIGHUse after free in Autofill in Google Chrome on iOS prior to 149.0.7827.53 allowed a remote attacker who convinced a user to engage in specifEPSS 0.3%CVE-2026-13807HIGHUse after free in Import in Google Chrome on iOS prior to 150.0.7871.47 allowed a remote attacker who convinced a user to engage in specificEPSS 0.3%CVE-2023-4208HIGHUse-after-free in Linux kernel's net/sched: cls_u32 componentEPSS 0.3%CVE-2026-100800CRITICALSandbox escape due to use-after-free in the Disability Access APIs componentEPSS 0.3%CVE-2026-100765HIGHUse-after-free in the JavaScript: WebAssembly componentEPSS 0.3%CVE-2023-26991HIGHSWFTools v0.9.2 was discovered to contain a stack-use-after-scope in the swf_ReadSWF2 function in lib/rfxswf.c.EPSS 0.3%CVE-2026-91716CRITICALUse after free in Auth in Google Chrome prior to 153.0.8010.47 allowed a remote attacker to execute arbitrary code outside the sandbox via aEPSS 0.3%