Falhas do tipo CWE-787

5.862 resultados

Escrita fora dos limites de memória

Ocorre quando um programa escreve dados em um endereço de memória fora da área alocada para um buffer ou variável. O código não valida o tamanho ou índice antes de gravar, permitindo sobrescrita de dados adjacentes, corrupção de estruturas críticas ou execução de código arbitrário.

Exemplo

Um formulário web que copia dados do usuário para um buffer de 256 bytes sem validar o tamanho da entrada. Se o atacante envia 500 bytes, a escrita transborda e sobrescreve a pilha, podendo hijackear o endereço de retorno da função.

Como mitigar

Use funções seguras de cópia (strncpy, strlcpy ao invés de strcpy; memcpy com tamanho máximo explícito) e sempre valide comprimento e índices antes de escrever. Em linguagens modernas, prefira estruturas com bounds-checking automático (arrays em Java, Rust, etc).

CVE-2026-79019CRITICALOut of bounds write in ANGLE in Google Chrome on on Windows prior to 152.0.7977.65 allowed a remote attacker to potentially execute arbitrarEPSS 0.5%CVE-2025-5269HIGHMemory safety bug fixed in Firefox ESR 128.11 and Thunderbird 128.11EPSS 0.5%CVE-2026-43815HIGHA buffer overflow was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS TahoeEPSS 0.5%CVE-2026-17691CRITICALOut of bounds write in ANGLE in Google Chrome on Windows prior to 151.0.7922.72 allowed a remote attacker to potentially perform a sandbox eEPSS 0.5%CVE-2023-3090HIGHOut-of-bounds write in Linux kernel's ipvlan network driverEPSS 0.5%CVE-2026-68579HIGHFreeRDP before 3.30.0 Heap Overflow via CliprdrStream_ReadEPSS 0.5%CVE-2026-31970HIGHHTSlib BGZF index file reader has a heap buffer overflowEPSS 0.5%CVE-2025-32405HIGHAn Out-of-bounds Write in RT-Labs P-Net version 1.0.1 or earlier allows an attacker to induce a crash in IO devices that use the library by EPSS 0.5%CVE-2025-57812LOW[BIGSLEEP-434612419] CUPS-Filters has heap-buffer-overflow write in `cfImageLut()`EPSS 0.5%CVE-2026-84444HIGHlibheif uncompressed tiled image encoding allows out-of-bounds writeEPSS 0.5%CVE-2026-73193CRITICALDBI versions before 1.652 for Perl allow a heap out-of-bounds write on 32-bit perl via an integer wraparound in the output buffer size computed by preparseEPSS 0.5%CVE-2024-22268HIGHVMware Workstation and Fusion contain a heap buffer-overflow vulnerability in the Shader functionality. A malicious actor with non-administrEPSS 0.5%CVE-2026-17272HIGHIBM i is Affected By a Denial of Service in HTTP Server []EPSS 0.5%CVE-2022-46322HIGHSome smartphones have the out-of-bounds write vulnerability. Successful exploitation of this vulnerability may cause system service exceptioEPSS 0.5%CVE-2026-7372CRITICALGeoVision GV-VMS V20 WebCam Server Login stack overflow vulnerabilityEPSS 0.5%CVE-2025-10920HIGHGIMP ICNS File Parsing Out-Of-Bounds Write Remote Code Execution VulnerabilityEPSS 0.5%CVE-2026-86882MEDIUMAn out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 26.7 and iPadOS 26.7, iOS 27 and iPadOSEPSS 0.5%CVE-2021-3695—A crafted 16-bit grayscale PNG image may lead to a out-of-bounds write in the heap area. An attacker may take advantage of that to cause heaEPSS 0.5%CVE-2026-57021MEDIUMJunos OS: SRX Series: If VPN compliance-check is configured an attacker can cause http-gk process crashEPSS 0.5%CVE-2026-59087HIGHGimp: heap buffer overflow in `file-seattle-filmworks` load — `fread` writes attacker-controlled length into undersized allocationEPSS 0.5%