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-2026-42904CRITICALWindows TCP/IP Elevation of Privilege VulnerabilityEPSS 0.5%CVE-2026-23827HIGHUnauthenticated Remote Code Execution via Heap Buffer Overflow in Network Management ServiceEPSS 0.5%CVE-2025-24050HIGHWindows Hyper-V Elevation of Privilege VulnerabilityEPSS 0.5%CVE-2025-24048HIGHWindows Hyper-V Elevation of Privilege VulnerabilityEPSS 0.5%CVE-2022-3234HIGHHeap-based Buffer Overflow in vim/vimEPSS 0.5%CVE-2025-2757MEDIUMOpen Asset Import Library Assimp MD5 File MD5Parser.cpp AI_MD5_PARSE_STRING_IN_QUOTATION heap-based overflowEPSS 0.5%CVE-2026-8509HIGHHeap buffer overflow in WebML in Google Chrome prior to 148.0.7778.168 allowed a remote attacker to execute arbitrary code inside a sandbox EPSS 0.5%CVE-2026-9119HIGHHeap buffer overflow in WebRTC in Google Chrome on prior to 148.0.7778.179 allowed a remote attacker to execute arbitrary code inside a sandEPSS 0.5%CVE-2025-34523CRITICALArcserve UDP < 10.2 Pre-Authentication Heap OverflowEPSS 0.5%CVE-2026-12725MEDIUMDnsmasq: dnsmasq: heap buffer overflow in log_query() when logging unsupported ds/dnskey repliesEPSS 0.5%CVE-2025-62608MEDIUMMLX has heap-buffer-overflow in load()EPSS 0.5%CVE-2026-79377HIGHA heap overflow in the a2dp_decoder_sbc.cpp component of Bestechnic Co., Ltd BES2300 Bluetooth Audio SoC firmware v3.x and earlier allows atEPSS 0.5%CVE-2024-43528HIGHWindows Secure Kernel Mode Elevation of Privilege VulnerabilityEPSS 0.5%CVE-2023-33152HIGHMicrosoft ActiveX Remote Code Execution VulnerabilityEPSS 0.5%CVE-2025-53737HIGHMicrosoft Excel Remote Code Execution VulnerabilityEPSS 0.5%CVE-2024-30806MEDIUMAn issue was discovered in Bento4 v1.6.0-641-2-g1529b83. There is a heap overflow in AP4_Dec3Atom::AP4_Dec3Atom at Ap4Dec3Atom.cpp, leading EPSS 0.5%CVE-2025-47436MEDIUMApache ORC: Potential Heap Buffer Overflow during C++ LZO DecompressionEPSS 0.5%CVE-2026-22697HIGHCryptoLib Has Heap Buffer Overflow Vulnerability in KMC Base64 Decode Handling (KMC JSON base64ciphertext/base64cleartext)EPSS 0.5%CVE-2024-5301HIGHKofax Power PDF PSD File Parsing Heap-based Buffer Overflow Remote Code Execution VulnerabilityEPSS 0.5%CVE-2026-2597HIGHCrypt::SysRandom::XS versions before 0.010 for Perl is vulnerable to a heap buffer overflow in the XS function random_bytes()EPSS 0.5%