Fallos del tipo CWE-126

581 resultados

Leitura excessiva de buffer na pilha

Ocorre quando o código lê mais dados de um buffer alocado na pilha do que o tamanho dele permite. O atacante consegue expor dados sensíveis que estão em posições de memória adjacentes (senhas, tokens, dados de outros processos) ou causar crash da aplicação.

Ejemplo

Uma função recebe uma string de 64 bytes na pilha, mas usa strcpy() ou memcpy() sem validar o tamanho real, lendo 128 bytes. Os 64 bytes extras vêm de outras variáveis locais ou frames de função anteriores, expondo informações confidenciais.

Cómo mitigar

Use funções seguras com limite explícito de bytes (strncpy, snprintf, memcpy com tamanho validado) ou linguagens com bounds-checking automático. Valide sempre o tamanho de entrada contra o buffer antes de ler, e use ferramentas estáticas (ASan, Clang Static Analyzer) durante desenvolvimento.

CVE-2026-76885LOWBuffer Over-read in WiresharkEPSS 0.2%CVE-2026-76884LOWBuffer Over-read in WiresharkEPSS 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-2023-43537MEDIUMBuffer Over-read in WLAN HostEPSS 0.2%CVE-2024-21457MEDIUMBuffer Over-read in WLAN Host CommunicationEPSS 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-2026-3203MEDIUMBuffer Over-read in WiresharkEPSS 0.2%CVE-2025-59933MEDIUMlibvips is vulnerable to Buffer Over-Read in poppler-based pdfloadEPSS 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-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-2022-4435MEDIUMA buffer over-read vulnerability was reported in the ThinkPadX13s BIOS LenovoRemoteConfigUpdateDxe driver that could allow a local attacker EPSS 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-2026-40341LOWlibgphoto2 has an OOB Read in ptp_unpack_EOS_FocusInfoExEPSS 0.2%