Fallos del tipo CWE-131

190 resultados

Cálculo Incorreto de Tamanho de Buffer

Ocorre quando o desenvolvedor calcula de forma errada o tamanho de memória necessária para um buffer, resultando em alocação insuficiente. Isso permite que dados escritos ultrapassem o limite do buffer, causando corrupção de memória, crash ou execução de código arbitrário.

Ejemplo

Um programa recebe uma string de tamanho desconhecido e aloca buffer com `malloc(strlen(input))` em vez de `malloc(strlen(input) + 1)`. O espaço para o terminador nulo é esquecido, e a cópia transborda o buffer adjacente.

Cómo mitigar

Use funções seguras como `snprintf()` ou `strncpy()` que aceitam o tamanho máximo como parâmetro. Ao calcular tamanho, sempre considere: comprimento real dos dados + espaço para terminadores + padding necessário. Automatize com ferramentas estáticas (AddressSanitizer, Valgrind) em testes para detectar transbordamentos.

CVE-2026-53143HIGHdrm/amdkfd: Fix buffer overflow in SDMA queue checkpoint/restore on GFX11EPSS 0.2%CVE-2026-47773HIGHArduinoBLE: Memory corruption via malformed ATT write requestEPSS 0.1%CVE-2026-112008MEDIUMlibmng through 2.0.3 Heap Buffer Overflow via ORDR Chunk Reader mng_read_ordrEPSS 0.1%CVE-2026-95111MEDIUMModule queue front-send validates a word count as a byte countEPSS 0.1%CVE-2026-53091HIGHnet: pull headers in qdisc_pkt_len_segs_init()EPSS 0.1%CVE-2025-71286HIGHASoC: SOF: ipc4-topology: Correct the allocation size for bytes controlsEPSS 0.1%CVE-2026-18743LOWPopt-devel: popt-static: short realloc in poptconfigfiletostringEPSS 0.1%CVE-2026-47578HIGHNVIDIA GPU Display Driver for Windows contains a vulnerability in the kernel mode layer where an attacker could cause an incorrect buffer siEPSS 0.1%CVE-2022-32630MEDIUMIn throttling, there is a possible out of bounds write due to an incorrect calculation of buffer size. This could lead to local escalation oEPSS 0.1%CVE-2026-45784MEDIUMrust-openssl: Potential out-of-bounds write in `CipherCtxRef::cipher_update_inplace` for AES-KW-PAD ciphersEPSS 0.1%CVE-2026-2738MEDIUMBuffer overflow in ovpn‑dco‑win version 2.8.0 allows local attackers to cause a system crash by sending too large packets to the remote peerEPSS 0.1%CVE-2026-42169HIGHGimp: gimp apng loader heap-buffer-overflow when fctl width exceeds ihdr width (file-png.c)EPSS 0.1%CVE-2026-28686MEDIUMImageMagick has a write heap-buffer-overflow in PCL encoder via undersized output bufferEPSS 0.1%CVE-2026-116737MEDIUMlibphdi through 20260902 Heap Out-of-Bounds Read via Extent Data File PathEPSS 0.1%CVE-2026-107590LOWOut-of-bounds write vulnerability in QTextCodec iconv-based encoding impacts QtEPSS 0.1%CVE-2026-102729MEDIUM`gx_binres_theme_load()` sizes its theme buffer for the theme it was asked for, and allocates it even when the resource holds no theme with EPSS 0.1%CVE-2026-78221MEDIUMAn incorrect buffer size calculation in the Windows Interactive Service in OpenVPN 2.7_alpha1 through 2.7.6 allows local authenticated usersEPSS 0.1%CVE-2026-46521MEDIUMImageMagick: Heap Buffer Over-Write in MIFF encoder when using LZMA compressionEPSS 0.1%CVE-2026-13466HIGHUnit Confusion in VAB AuthenticationEPSS 0.1%CVE-2022-32649MEDIUMIn jpeg, there is a possible use after free due to a logic error. This could lead to local escalation of privilege with System execution priEPSS 0.1%