Falhas do tipo CWE-122

3.190 resultados

Estouro de heap

Ocorre quando código escreve mais dados do que o espaço alocado em uma região de memória dinâmica (heap), sobrescrevendo dados adjacentes. Um atacante pode explorar isso para corromper estruturas de dados críticas, contornar proteções de segurança ou executar código arbitrário.

Exemplo

Um servidor web aloca 256 bytes para armazenar um nome de usuário, mas copia 512 bytes de uma requisição sem validação. Os 256 bytes extras sobrescrevem ponteiros ou metadados do heap, permitindo execução de código ou negação de serviço.

Como mitigar

Use funções seguras que respeitam limites (strcpy_s, memcpy com tamanho verificado em runtime). Validar e limitar o tamanho de entrada antes de copiar. Ativar proteções como ASLR, stack canaries e ferramentas de sanitização (AddressSanitizer) em desenvolvimento.

CVE-2026-72940HIGHWindows Schannel Remote Code Execution VulnerabilityEPSS 0.8%CVE-2026-69442HIGHMicrosoft Office Remote Code Execution VulnerabilityEPSS 0.8%CVE-2026-78511HIGHMicrosoft Office Word Remote Code Execution VulnerabilityEPSS 0.8%CVE-2026-77482HIGHMicrosoft SQL Server Remote Code Execution VulnerabilityEPSS 0.8%CVE-2026-72986HIGHGraphic Fonts Remote Code Execution VulnerabilityEPSS 0.8%CVE-2026-72973HIGHMicrosoft Office Word Remote Code Execution VulnerabilityEPSS 0.8%CVE-2026-72933HIGHMicrosoft WDAC OLE DB provider for SQL Remote Code Execution VulnerabilityEPSS 0.8%CVE-2026-77486HIGHMicrosoft SQL Server Remote Code Execution VulnerabilityEPSS 0.8%CVE-2026-78512HIGHMicrosoft Office Word Remote Code Execution VulnerabilityEPSS 0.8%CVE-2026-80074HIGHRemote Desktop Client Remote Code Execution VulnerabilityEPSS 0.8%CVE-2026-77907HIGHVisual Studio Remote Code Execution VulnerabilityEPSS 0.8%CVE-2022-44654HIGHAffected builds of Trend Micro Apex One and Apex One as a Service contain a monitor engine component that is complied without the /SAFESEH mEPSS 0.8%CVE-2025-70293CRITICALAn issue was discovered in Denx U-Boot before 2026.04. An integer overflow vulnerability exists in function ext4fs_get_bgdtable, the size caEPSS 0.8%CVE-2024-20259HIGHA vulnerability in the DHCP snooping feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected dEPSS 0.8%CVE-2021-44442—A vulnerability has been identified in JT Utilities (All versions < V13.1.1.0), JTTK (All versions < V11.1.1.0). JTTK library in affected prEPSS 0.8%CVE-2023-47038HIGHPerl: write past buffer end via illegal user-defined unicode propertyEPSS 0.8%CVE-2021-44445—A vulnerability has been identified in JT Utilities (All versions < V13.1.1.0), JTTK (All versions < V11.1.1.0). JTTK library in affected prEPSS 0.8%CVE-2024-32617HIGHHDF5 Library through 1.14.3 contains a heap-based buffer over-read caused by the unsafe use of strdup in H5MM_xstrdup in H5MM.c (called fromEPSS 0.8%CVE-2022-1244HIGHheap-buffer-overflow in radareorg/radare2EPSS 0.8%CVE-2025-53783HIGHMicrosoft Teams Remote Code Execution VulnerabilityEPSS 0.8%