Weaknesses of type CWE-416

5,042 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-2023-38228HIGHZDI-CAN-21317: Adobe Acrobat Reader DC Font Parsing Use-After-Free Remote Code Execution VulnerabilityEPSS 3.0%CVE-2023-38227HIGHZDI-CAN-21241: Adobe Acrobat Reader DC Font Parsing Use-After-Free Remote Code Execution VulnerabilityEPSS 3.0%CVE-2024-39424HIGHZDI-CAN-24309: Adobe Acrobat Reader DC Annotation Use-After-Free Remote Code Execution VulnerabilityEPSS 3.0%CVE-2024-39422HIGHZDI-CAN-24090: New Vulnerability Report - Use-after-free remote code execution vulnerability in Adobe Acrobat Reader DCEPSS 3.0%CVE-2019-3994—ELOG 3.1.4-57bea22 and below is affected by a denial of service vulnerability due to a use after free. A remote unauthenticated attacker canEPSS 2.9%CVE-2023-35618CRITICALMicrosoft Edge (Chromium-based) Elevation of Privilege VulnerabilityEPSS 2.9%CVE-2024-4741HIGHUse After Free with SSL_free_buffersEPSS 2.9%CVE-2021-34843HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit PDF Reader 11.0.0.49893. User interaEPSS 2.9%CVE-2023-38222HIGHZDI-CAN-21103: Adobe Acrobat Reader DC AcroForm spawnPageFromTemplate Use-After-Free Remote Code Execution VulnerabilityEPSS 2.9%CVE-2021-21779MEDIUMA use-after-free vulnerability exists in the way Webkit’s GraphicsContext handles certain events in WebKitGTK 2.30.4. A specially crafted weEPSS 2.9%CVE-2021-34849HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit PDF Reader 11.0.0.49893. User interaEPSS 2.9%CVE-2018-9946—This vulnerability allows remote attackers to disclose sensitive information on vulnerable installations of Foxit Reader 9.0.0.29935. User iEPSS 2.9%CVE-2022-34224HIGHAdobe Acrobat Reader DC AcroForm setItems Use-After-Free Remote Code Execution VulnerabilityEPSS 2.8%CVE-2021-31470HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit Reader 10.1.1.37576. User interactioEPSS 2.8%CVE-2026-23631MEDIUMredis-server Lua use-after-free may allow remote code executionEPSS 2.8%CVE-2020-13531HIGHA use-after-free vulnerability exists in a way Pixar OpenUSD 20.08 processes reference paths textual USD files. A specially crafted file canEPSS 2.8%CVE-2021-42381HIGHA use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in theEPSS 2.8%CVE-2021-42385HIGHA use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in theEPSS 2.8%CVE-2021-42379HIGHA use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in theEPSS 2.8%CVE-2021-31453HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit Reader 10.1.1.37576. User interactioEPSS 2.8%