Falhas do tipo CWE-122

3.210 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-2026-49430HIGHKernel heap overflow in ZFS_IOC_RECV_NEW ioctlEPSS 0.2%CVE-2026-30931MEDIUMImageMagick has a heap-based buffer overflow in UHDR encoderEPSS 0.2%CVE-2025-46373HIGHA Heap-based Buffer Overflow vulnerability [CWE-122] vulnerability in Fortinet FortiClientWindows 7.4.0 through 7.4.3, FortiClientWindows 7.EPSS 0.2%CVE-2026-35590MEDIUMPossible out-of-bounds read leading to crash when decoding well-crafted EXIF metadataEPSS 0.2%CVE-2026-54000HIGHosquery: Heap buffer overflow in `getProcessCurrentDirectory()` via `processes` table (Windows)EPSS 0.2%CVE-2026-81474HIGHDell OpenManage Server Administrator, versions prior to 11.1.0.3, contains a Heap-based Buffer Overflow vulnerability. A low privileged attaEPSS 0.2%CVE-2026-49429HIGHKernel heap overflow in ZFS_IOC_USERSPACE_MANY ioctlEPSS 0.2%CVE-2026-23750HIGHGolioth Pouch (prior to commit 1b2219a1) BLE GATT Heap-based Buffer OverflowEPSS 0.2%CVE-2026-54001HIGHosquery: Heap buffer overflow via `authenticode` table (Windows)EPSS 0.2%CVE-2025-8300HIGHRealtek rtl81xx SDK Wi-Fi Driver rtwlanu Heap-based Buffer Overflow Local Privilege Escalation VulnerabilityEPSS 0.2%CVE-2026-18938MEDIUMP11-kit: integer overflow in rpc attribute-array length calculation can under-allocate nested attribute storage on 32 bit systemsEPSS 0.2%CVE-2025-8301HIGHRealtek RTL8811AU rtwlanu.sys N6CSet_DOT11_CIPHER_DEFAULT_KEY Heap-based Buffer Overflow Local Privilege Escalation VulnerabilityEPSS 0.2%CVE-2025-8302HIGHRealtek rtl81xx SDK Wi-Fi Driver rtwlanu Heap-based Buffer Overflow Local Privilege Escalation VulnerabilityEPSS 0.2%CVE-2025-8299HIGHRealtek rtl81xx SDK Wi-Fi Driver MgntActSet_TEREDO_SET_RS_PACKET Heap-based Buffer Overflow Local Privilege Escalation VulnerabilityEPSS 0.2%CVE-2026-30936MEDIUMImageMagick has a heap Buffer Overflow in WaveletDenoiseImageEPSS 0.1%CVE-2026-21488MEDIUMiccDEV has Out-of-bounds Read, Heap-based Buffer Overflow and Improper Null TerminationEPSS 0.1%CVE-2025-20741MEDIUMIn wlan AP driver, there is a possible out of bounds write due to an incorrect bounds check. This could lead to local escalation of privilegEPSS 0.1%CVE-2026-33987HIGHFreeRDP: Persistent Cache bmpSize Desync - Heap OOB WriteEPSS 0.1%CVE-2024-46993MEDIUMElectron Vulnerable to Heap Buffer Overflow in NativeImage::CreateFromPathEPSS 0.1%CVE-2026-20480MEDIUMIn Audio HAL, there is a possible out of bounds write due to a heap buffer overflow. This could lead to local denial of service with User exEPSS 0.1%