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-2023-21787HIGH3D Builder Remote Code Execution VulnerabilityEPSS 0.9%CVE-2024-32621CRITICALHDF5 Library through 1.14.3 contains a heap-based buffer overflow in H5HG_read in H5HG.c (called from H5VL__native_blob_get in H5VLnative_blEPSS 0.9%CVE-2020-7852HIGHDaviewIndy Heap Overflow VulnerabilitiesEPSS 0.9%CVE-2026-72950HIGHWindows Routing and Remote Access Service (RRAS) Remote Code Execution VulnerabilityEPSS 0.9%CVE-2026-19874CRITICALKonami's Metal Gear Online 3 contains a heap-based buffer overflowEPSS 0.9%CVE-2022-20946HIGHA vulnerability in the generic routing encapsulation (GRE) tunnel decapsulation feature of Cisco Firepower Threat Defense (FTD) Software couEPSS 0.9%CVE-2023-29344HIGHMicrosoft Office Remote Code Execution VulnerabilityEPSS 0.9%CVE-2026-80087MEDIUMMicrosoft Office Information Disclosure VulnerabilityEPSS 0.9%CVE-2022-0631MEDIUMHeap-based Buffer Overflow in mruby/mrubyEPSS 0.9%CVE-2024-0145MEDIUMNVIDIA nvJPEG2000 library contains a vulnerability where an attacker can cause a heap-based buffer overflow issue by means of a specially crEPSS 0.9%CVE-2026-67373HIGHMicrosoft SQL Server Remote Code Execution VulnerabilityEPSS 0.9%CVE-2026-56194HIGHWindows NFS Server Elevation of Privilege VulnerabilityEPSS 0.9%CVE-2026-67388HIGHMicrosoft SQL Server Remote Code Execution VulnerabilityEPSS 0.9%CVE-2026-68775HIGHMicrosoft SQL Server Remote Code Execution VulnerabilityEPSS 0.9%CVE-2026-77481HIGHMicrosoft SQL Server Remote Code Execution VulnerabilityEPSS 0.9%CVE-2026-69522HIGH.NET and Visual Studio Remote Code Execution VulnerabilityEPSS 0.9%CVE-2026-73012HIGHWindows Management Services Elevation of Privilege VulnerabilityEPSS 0.9%CVE-2026-67384HIGHMicrosoft SQL Server Remote Code Execution VulnerabilityEPSS 0.9%CVE-2026-67639HIGHMicrosoft SQL Server Remote Code Execution VulnerabilityEPSS 0.9%CVE-2026-69547HIGHWindows DHCP Server Remote Code Execution VulnerabilityEPSS 0.9%