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-2026-3994MEDIUMrui314 mold Object File input-files.cc initialize_sections heap-based overflowEPSS 0.2%CVE-2026-90682MEDIUMMatthias-Wandel jhead WebP EXIF gpsinfo.c ProcessGpsInfo heap-based overflowEPSS 0.2%CVE-2026-44662MEDIUMrust-openssl: Heap buffer overflow when encrypting with AES key-wrap-with-paddingEPSS 0.2%CVE-2026-19206MEDIUMMZ Automation libiec61850 ASDU Element sv_subscriber.c SVReceiver_stopThreadless heap-based overflowEPSS 0.2%CVE-2026-82591MEDIUMOpen Asset Import Library Assimp MD5Loader.cpp MakeDataUnique heap-based overflowEPSS 0.2%CVE-2026-48690HIGHFastNetMon Community Edition through 1.2.9 contains an integer overflow vulnerability in the packet capture buffer allocation. In src/packetEPSS 0.2%CVE-2026-19259MEDIUMMZ Automation libiec61850 MMS Protocol Workflow iec61850_common.c MmsMapping_varAccessSpecToObjectReference heap-based overflowEPSS 0.2%CVE-2026-6491MEDIUMlibvips nip2 vips7compat.c im_minpos_vec heap-based overflowEPSS 0.2%CVE-2026-9500MEDIUMGNU LibreDWG Dwgread Utility decode.c read_2004_compressed_section heap-based overflowEPSS 0.2%CVE-2026-9502MEDIUMGNU LibreDWG Dwgread Utility decode.c decompress_R2004_section heap-based overflowEPSS 0.2%CVE-2026-18784MEDIUMo6 open62541 ua_client_highlevel.c UA_Client_readNodeClassAttribute heap-based overflowEPSS 0.2%CVE-2026-77396MEDIUMPJSIP: Heap buffer overflow in the AVI parserEPSS 0.2%CVE-2025-15666MEDIUMOpen Asset Import Library Assimp Model File SceneCombiner.cpp Copy heap-based overflowEPSS 0.2%CVE-2026-5235MEDIUMAxiomatic Bento4 MP4 File Ap4Dac4Atom.cpp ReadCache heap-based overflowEPSS 0.2%CVE-2026-63451LOWSuricata detect: frame rules without content and with transform can cause heap buffer overflow during rule loadEPSS 0.2%CVE-2026-5236MEDIUMAxiomatic Bento4 DSI v1 Ap4Dac4Atom.cpp SkipBits heap-based overflowEPSS 0.2%CVE-2026-3195HIGHQemu-kvm: virtio-snd: heap buffer overflow in virtio_snd_pcm_in_cb (incomplete fix for cve-2024-7730)EPSS 0.2%CVE-2025-60468MEDIUMGPAC Multimedia Open Source Project GPAC Project/MP4Box 2.5-DEV-rev1593-gfe88c3545-master is affected by: Buffer Overflow. The impact is: caEPSS 0.2%CVE-2026-5185MEDIUMNothings stb_image Multi-frame GIF File stb_image.h stbi__gif_load_next heap-based overflowEPSS 0.2%CVE-2025-5040HIGHRTE File Parsing Heap-Based Overflow VulnerabilityEPSS 0.2%