Falhas do tipo CWE-122

3.195 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-2026-56789HIGHRTKLIB 2.4.3 - Heap Buffer Overflow and Stack Read via Oversized RINEX Epoch Satellite CountEPSS 0.4%CVE-2023-21804HIGHWindows Graphics Component Elevation of Privilege VulnerabilityEPSS 0.4%CVE-2023-25890HIGHZDI-CAN-19493: Adobe Dimension USD File Parsing Heap-based Buffer Overflow Remote Code Execution VulnerabilityEPSS 0.4%CVE-2023-25895HIGHZDI-CAN-19540: Adobe Dimension USD File Parsing Heap-based Buffer Overflow Remote Code Execution VulnerabilityEPSS 0.4%CVE-2023-25885HIGHZDI-CAN-19480: Adobe Dimension USD File Parsing Heap-based Buffer Overflow Remote Code Execution VulnerabilityEPSS 0.4%CVE-2026-56208HIGHLibaom: libaom: heap buffer overflow in av1 encoder first-pass stats buffer via lap modeEPSS 0.4%CVE-2023-25898HIGHZDI-CAN-19521: Adobe Dimension USD File Parsing Heap-based Buffer Overflow Remote Code Execution VulnerabilityEPSS 0.4%CVE-2022-1052HIGHHeap Buffer Overflow in iterate_chained_fixups in radareorg/radare2EPSS 0.4%CVE-2023-25897HIGHZDI-CAN-19520: Adobe Dimension USD File Parsing Heap-based Buffer Overflow Remote Code Execution VulnerabilityEPSS 0.4%CVE-2022-2061LOWHeap-based Buffer Overflow in hpjansson/chafaEPSS 0.4%CVE-2026-40380MEDIUMWindows Volume Manager Extension Driver Remote Code Execution VulnerabilityEPSS 0.4%CVE-2025-65085HIGHHeap-based Buffer Overflow in Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, Cobalt ShareEPSS 0.4%CVE-2026-6305HIGHHeap buffer overflow in PDFium in Google Chrome prior to 147.0.7727.101 allowed a remote attacker to execute arbitrary code inside a sandboxEPSS 0.4%CVE-2024-8798HIGHBluetooth: classic: avdtp: missing buffer length checkEPSS 0.4%CVE-2026-6306HIGHHeap buffer overflow in PDFium in Google Chrome prior to 147.0.7727.101 allowed a remote attacker to execute arbitrary code inside a sandboxEPSS 0.4%CVE-2026-45696HIGHOpenEXR HTJ2K decoder heap buffer over-read in ht_undo_impl() (DoS)EPSS 0.4%CVE-2016-15059CRITICALNet::IDN::Punycode versions before 2.301 for Perl allow a heap buffer overflow via unchecked writes past the output buffer in encode_punycodeEPSS 0.4%CVE-2026-8529HIGHHeap buffer overflow in Codecs in Google Chrome prior to 148.0.7778.168 allowed a remote attacker to execute arbitrary code inside a sandboxEPSS 0.4%CVE-2023-47039HIGHPerl: perl for windows binary hijacking vulnerabilityEPSS 0.4%CVE-2024-20508MEDIUMCisco UTD Snort IPS Engine Software for Cisco IOS XE Software Security Policy Bypass and Denial of Service VulnerabilityEPSS 0.4%