Weaknesses of type CWE-122

3,189 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-2020-4068MEDIUMHeap-based Buffer Overflow in APNSwiftEPSS 1.3%CVE-2022-1160HIGHheap buffer overflow in get_one_sourceline in vim/vimEPSS 1.3%CVE-2024-30020HIGHWindows Cryptographic Services Remote Code Execution VulnerabilityEPSS 1.3%CVE-2020-25199—A heap-based buffer overflow vulnerability exists within the WECON LeviStudioU Release Build 2019-09-21 and prior when processing project fiEPSS 1.3%CVE-2022-2264HIGHHeap-based Buffer Overflow in vim/vimEPSS 1.3%CVE-2025-33064HIGHWindows Routing and Remote Access Service (RRAS) Remote Code Execution VulnerabilityEPSS 1.3%CVE-2026-21248HIGHWindows Hyper-V Remote Code Execution VulnerabilityEPSS 1.3%CVE-2026-21244HIGHWindows Hyper-V Remote Code Execution VulnerabilityEPSS 1.3%CVE-2023-24907HIGHMicrosoft PostScript and PCL6 Class Printer Driver Remote Code Execution VulnerabilityEPSS 1.3%CVE-2023-23406HIGHMicrosoft PostScript and PCL6 Class Printer Driver Remote Code Execution VulnerabilityEPSS 1.3%CVE-2023-24868HIGHMicrosoft PostScript and PCL6 Class Printer Driver Remote Code Execution VulnerabilityEPSS 1.3%CVE-2023-24867HIGHMicrosoft PostScript and PCL6 Class Printer Driver Remote Code Execution VulnerabilityEPSS 1.3%CVE-2023-23403HIGHMicrosoft PostScript and PCL6 Class Printer Driver Remote Code Execution VulnerabilityEPSS 1.3%CVE-2023-24913HIGHMicrosoft PostScript and PCL6 Class Printer Driver Remote Code Execution VulnerabilityEPSS 1.3%CVE-2025-29967HIGHRemote Desktop Client Remote Code Execution VulnerabilityEPSS 1.3%CVE-2024-3204HIGHc-blosc2 ndlz4x4.c ndlz4_decompress heap-based overflowEPSS 1.3%CVE-2020-28598HIGHAn out-of-bounds write vulnerability exists in the Admesh stl_fix_normal_directions() functionality of Prusa Research PrusaSlicer 2.2.0 and EPSS 1.3%CVE-2025-21273HIGHWindows Telephony Service Remote Code Execution VulnerabilityEPSS 1.3%CVE-2025-21282HIGHWindows Telephony Service Remote Code Execution VulnerabilityEPSS 1.3%CVE-2025-21266HIGHWindows Telephony Service Remote Code Execution VulnerabilityEPSS 1.3%