Fallos del tipo CWE-122

3210 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-2026-8834HIGHIBM HTTP Server is affected by multiple vulnerabilitiesEPSS 0.3%CVE-2024-31582HIGHFFmpeg version n6.1 was discovered to contain a heap buffer overflow vulnerability in the draw_block_rectangle function of libavfilter/vf_coEPSS 0.3%CVE-2026-23567MEDIUMInteger underflow in Content Distribution Service UDP handlerEPSS 0.3%CVE-2026-13307MEDIUMAutel MaxiCharger AC Elite Home USB Heap-based Buffer Overflow Arbitrary Code Execution VulnerabilityEPSS 0.3%CVE-2026-2648HIGHHeap buffer overflow in PDFium in Google Chrome prior to 145.0.7632.109 allowed a remote attacker to perform an out of bounds memory write vEPSS 0.3%CVE-2023-52168HIGHThe NtfsHandler.cpp NTFS handler in 7-Zip before 24.01 (for 7zz) contains a heap-based buffer overflow that allows an attacker to overwrite EPSS 0.3%CVE-2026-38755LOWA heap overflow in the evalcommand() function (shell/ash.c) of Busybox v1.38.0 allows attackers to cause a Denial of Service (DoS) via supplEPSS 0.3%CVE-2026-78510HIGHMicrosoft Outlook and Word Remote Code Execution VulnerabilityEPSS 0.3%CVE-2022-1892MEDIUMA buffer overflow in the SystemBootManagerDxe driver in some Lenovo Notebook products may allow an attacker with local privileges to executeEPSS 0.3%CVE-2022-1891MEDIUMA buffer overflow in the SystemLoadDefaultDxe driver in some Lenovo Notebook products may allow an attacker with local privileges to executeEPSS 0.3%CVE-2022-1890MEDIUMA buffer overflow in the ReadyBootDxe driver in some Lenovo Notebook products may allow an attacker with local privileges to execute arbitraEPSS 0.3%CVE-2026-70583HIGHWindows Core Messaging Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-68888HIGHMicrosoft Standard XPS Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-69594HIGHMicrosoft Local Security Authority (LSA) Server Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-68850HIGHMicrosoft Account Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-69459HIGHWindows Power Dependency Coordinator Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2026-69541HIGHVirtual Hard Disk (VHD) Miniport Driver Elevation of Privilege VulernabilityEPSS 0.3%CVE-2026-69432HIGHVolume Manager Driver Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2025-15533MEDIUMraysan5 raylib rtext.c GenImageFontAtlas heap-based overflowEPSS 0.3%CVE-2026-68890HIGHMicrosoft Standard XPS Elevation of Privilege VulnerabilityEPSS 0.3%