Weaknesses of type CWE-122

3,195 results

Transbordamento de heap (heap overflow)

Ocorre quando um programa escreve dados além dos limites de um buffer alocado dinamicamente na memória heap, sobrescrevendo dados adjacentes ou metadados do alocador. Isso permite que um atacante corrompa estruturas críticas, execute código arbitrário ou cause travamento da aplicação.

Example

Uma função recebe um tamanho de entrada sem validar e copia para um buffer: `strcpy(heap_buffer, user_input)` sem verificar se user_input cabe. Se o usuário enviar 1000 bytes para um buffer de 256, o overflow sobrescreve estruturas próximas no heap e pode ser explorado para RCE.

How to mitigate

Use funções seguras de cópia (`strncpy`, `strlcpy`), valide e limite o tamanho da entrada antes de copiar, e considere usar linguagens com gerenciamento automático de memória ou ferramentas como AddressSanitizer durante testes para detectar overflows.

CVE-2026-54986HIGHWindows Win32k Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-61923HIGHWindows Display Enhancement Service Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-69731HIGHHID Class Driver Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-44808HIGHWindows DWM Core Library Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-50489HIGHWin32k Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-78448HIGHWindows Biometric Service Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-62712HIGHWindows Win32k Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-69444HIGHMicrosoft Windows Speech Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-65814HIGHMicrosoft Windows Storage Port Driver Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-69790HIGHWindows Credential Providers Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-50332HIGHWindows Kernel Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-77904HIGHWindows Volume Manager Extension Driver Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-40404HIGHWindows Universal Disk Format File System Driver (UDFS) Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-62735HIGHWindows HTTP.sys Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-72992HIGHWindows Biometric Service Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-72953HIGHWindows USB Driver Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-69348HIGHWindows Win32k Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-49793HIGHWindows Resilient File System (ReFS) Remote Code Execution VulnerabilityEPSS 0.3%CVE-2026-69571HIGHWindows USB Audio Class driver (usbaudio.sys) Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-83988HIGHWindows Biometric Service Elevation of Privilege VulnerabilityEPSS 0.3%