Weaknesses of type CWE-416

5,110 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-2021-34968HIGHFoxit PDF Editor transitionToState Use-After-Free Remote Code Execution VulnerabilityEPSS 0.3%CVE-2021-34963HIGHFoxit PDF Editor PolyLine Annotation Use-After-Free Remote Code Execution VulnerabilityEPSS 0.3%CVE-2021-34960HIGHFoxit PDF Editor Circle Annotation Use-After-Free Remote Code Execution VulnerabilityEPSS 0.3%CVE-2021-34952HIGHFoxit PDF Reader Annotation Use-After-Free Remote Code Execution VulnerabilityEPSS 0.3%CVE-2021-34961HIGHFoxit PDF Editor Ink Annotation Use-After-Free Remote Code Execution VulnerabilityEPSS 0.3%CVE-2021-34962HIGHFoxit PDF Editor Caret Annotation Use-After-Free Remote Code Execution VulnerabilityEPSS 0.3%CVE-2021-34964HIGHFoxit PDF Editor Polygon Annotation Use-After-Free Remote Code Execution VulnerabilityEPSS 0.3%CVE-2021-34974HIGHFoxit PDF Reader Annotation Use-After-Free Remote Code Execution VulnerabilityEPSS 0.3%CVE-2021-34965HIGHFoxit PDF Editor Squiggly Annotation Use-After-Free Remote Code Execution VulnerabilityEPSS 0.3%CVE-2021-34959HIGHFoxit PDF Editor Square Annotation Use-After-Free Remote Code Execution VulnerabilityEPSS 0.3%CVE-2025-49699HIGHMicrosoft Office Remote Code Execution VulnerabilityEPSS 0.3%CVE-2021-34954HIGHFoxit PDF Editor StrikeOut Annotation Use-After-Free Remote Code Execution VulnerabilityEPSS 0.3%CVE-2021-34975HIGHFoxit PDF Reader transitionToState Use-After-Free Remote Code Execution VulnerabilityEPSS 0.3%CVE-2021-34956HIGHFoxit PDF Editor Underline Annotation Use-After-Free Remote Code Execution VulnerabilityEPSS 0.3%CVE-2021-34955HIGHFoxit PDF Editor Stamp Annotation Use-After-Free Remote Code Execution VulnerabilityEPSS 0.3%CVE-2021-34966HIGHFoxit PDF Editor FileAttachment Annotation Use-After-Free Remote Code Execution VulnerabilityEPSS 0.3%CVE-2026-45476HIGHMicrosoft Azure Network Adapter Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2023-48011HIGHGPAC v2.3-DEV-rev566-g50c2ab06f-master was discovered to contain a heap-use-after-free via the flush_ref_samples function at /gpac/src/isomeEPSS 0.3%CVE-2026-19154HIGHUse after free in Skia in Google Chrome on Android prior to 151.0.7922.109 allowed a remote attacker who had compromised the renderer procesEPSS 0.3%CVE-2025-27492HIGHWindows Secure Channel Elevation of Privilege VulnerabilityEPSS 0.3%