Falhas do tipo CWE-126

581 resultados

Leitura além dos limites do buffer em pilha

A aplicação lê dados além do tamanho alocado de um buffer armazenado na pilha (stack), acessando memória que não deveria. Diferente do overflow que escreve, aqui o problema é ler lixo de memória adjacente, expondo informações sensíveis ou causando crash se a memória for inacessível.

Exemplo

Uma função copia uma string para um buffer de 16 bytes, mas depois tenta processar 32 bytes do buffer sem validar o tamanho real. O código lê dados da pilha que pertencem a outras variáveis ou endereços de retorno, vazando informações ou provocando segfault.

Como mitigar

Sempre validar o tamanho dos dados antes de ler; usar funções seguras (strlen, strnlen) com limites explícitos; ativar canários de pilha (stack canaries) no compilador para detectar corrupção; fazer code review focado em loops e operações de memória sem bounds checking.

CVE-2026-76884LOWBuffer Over-read in WiresharkEPSS 0.2%CVE-2026-76885LOWBuffer Over-read in WiresharkEPSS 0.2%CVE-2024-21457MEDIUMBuffer Over-read in WLAN Host CommunicationEPSS 0.2%CVE-2023-43537MEDIUMBuffer Over-read in WLAN HostEPSS 0.2%CVE-2023-43568MEDIUMA buffer over-read was reported in the LemSecureBootForceKey module in some Lenovo Desktop products that may allow a local attacker with eleEPSS 0.2%CVE-2024-21458MEDIUMBuffer Over-read in WLAN HOSTEPSS 0.2%CVE-2026-21367HIGHBuffer Over-read in WLAN FirmwareEPSS 0.2%CVE-2026-6575MEDIUMPostgreSQL pg_restore_attribute_stats accepts values that cause query planning to read past end of stats arrayEPSS 0.2%CVE-2026-26282MEDIUMNanaZip has DotNet Single file OOB Heap ReadEPSS 0.2%CVE-2024-12975LOWSilicon Labs CPC can leak information in full duplex SPIEPSS 0.2%CVE-2026-94286HIGHOut-of-bounds read in libXtst's RECORD reply parserEPSS 0.2%CVE-2026-6532MEDIUMBuffer Over-read in WiresharkEPSS 0.2%CVE-2025-59933MEDIUMlibvips is vulnerable to Buffer Over-Read in poppler-based pdfloadEPSS 0.2%CVE-2026-3203MEDIUMBuffer Over-read in WiresharkEPSS 0.2%CVE-2026-46471MEDIUMAn issue was discovered in GStreamer gst-plugins-good before 1.28.2. While parsing an MP4 file, the isomp4 plugin's qtdemux_parse_uuid functEPSS 0.2%CVE-2022-4435MEDIUMA buffer over-read vulnerability was reported in the ThinkPadX13s BIOS LenovoRemoteConfigUpdateDxe driver that could allow a local attacker EPSS 0.2%CVE-2022-4433MEDIUMA buffer over-read vulnerability was reported in the ThinkPadX13s BIOS LenovoSetupConfigDxe driver that could allow a local attacker with elEPSS 0.2%CVE-2022-4432MEDIUMA buffer over-read vulnerability was reported in the ThinkPadX13s BIOS PersistenceConfigDxe driver that could allow a local attacker with elEPSS 0.2%CVE-2022-4434MEDIUMA buffer over-read vulnerability was reported in the ThinkPadX13s BIOS driver that could allow a local attacker with elevated privileges to EPSS 0.2%CVE-2026-40341LOWlibgphoto2 has an OOB Read in ptp_unpack_EOS_FocusInfoExEPSS 0.2%