Fallos del tipo CWE-122

3195 resultados

Estouro de heap

É quando o código escreve dados além dos limites de um buffer alocado no heap (memória dinâmica), sobrescrevendo dados de outras estruturas adjacentes. Esse estouro pode corromper metadados do heap, variáveis vizinhas ou objetos do programa, permitindo execução de código arbitrário ou negação de serviço.

Ejemplo

Um servidor web recebe uma string de tamanho arbitrário e a copia para um buffer de 256 bytes sem validar o comprimento (ex: strcpy em C). Se o atacante enviar 500 bytes, o restante escreve além da zona alocada, corrompendo estruturas próximas e potencialmente ganhando controle do fluxo.

Cómo mitigar

Use funções seguras (strncpy, strlcpy, snprintf em C) que respeitam limites de tamanho; valide e sanitize entrada do usuário antes de copiar; ative proteções do SO (ASLR, DEP/NX); use linguagens de memória segura quando possível; aplique verificações de limites em loops de cópia.

CVE-2026-53994HIGHProFTPD mod_sftp Heap Buffer Overflow via Unsigned Integer Underflow and Size TruncationEPSS 0.7%CVE-2023-5400HIGHServer receiving a malformed message based on a using the specified key values can cause a heap overflow vulnerability which could lead to aEPSS 0.7%CVE-2019-15690HIGHLibVNCServer 0.9.12 release and earlier contains heap buffer overflow vulnerability within the HandleCursorShape() function in libvncclient/EPSS 0.7%CVE-2025-32713HIGHWindows Common Log File System Driver Elevation of Privilege VulnerabilityEPSS 0.7%CVE-2026-26011CRITICALCritical Heap Out-of-bounds Access in `pf_cluster_stats()` via Malicious /initialpose Covariance -- Potential Remote Code ExecutionEPSS 0.7%CVE-2026-34545HIGHOpenEXR: integer overflow lead to OOB in HTJ2K decoderEPSS 0.7%CVE-2026-79393HIGHA heap-based buffer overflow vulnerability in the WS-Addressing Action transformation function in the Sofia IPC daemon in Xiongmai IP CameraEPSS 0.7%CVE-2021-3835HIGHBuffer overflow in usb device classEPSS 0.7%CVE-2025-29911HIGHCryptoLib Has Heap Buffer Overflow in Crypto_AOS_ProcessSecurity FunctionEPSS 0.7%CVE-2026-14266HIGH7-Zip XZ Decompression Heap-based Buffer Overflow Remote Code Execution VulnerabilityEPSS 0.7%CVE-2023-44418HIGHD-Link DIR-X3260 Prog.cgi Heap-based Buffer Overflow Remote Code Execution VulnerabilityEPSS 0.7%CVE-2025-47868CRITICALApache NuttX RTOS: tools/bdf-converter.: tools/bdf-converter: Fix loop termination condition.EPSS 0.7%CVE-2026-33901HIGHImageMagick has a Heap Buffer Overflow via MVG decoderEPSS 0.7%CVE-2024-39883HIGHHeap-based Buffer Overflow in Delta Electronics CNCSoft-G2EPSS 0.7%CVE-2025-54462CRITICALA heap-based buffer overflow vulnerability exists in the Nex parsing functionality of The Biosig Project libbiosig 3.9.0 and Master Branch (EPSS 0.7%CVE-2025-48005CRITICALA heap-based buffer overflow vulnerability exists in the RHS2000 parsing functionality of The Biosig Project libbiosig 3.9.0 and Master BranEPSS 0.7%CVE-2025-53557CRITICALA heap-based buffer overflow vulnerability exists in the MFER parsing functionality of The Biosig Project libbiosig 3.9.0 and Master Branch EPSS 0.7%CVE-2022-1240HIGHHeap buffer overflow in libr/bin/format/mach0/mach0.c in radareorg/radare2EPSS 0.7%CVE-2025-15233HIGHTenda M3 setAdInfoDetail formSetAdInfoDetails heap-based overflowEPSS 0.7%CVE-2026-44050CRITICALHeap buffer overflow in CNID daemon comm_rcv()EPSS 0.7%