Weaknesses of type CWE-787

5,146 results

Escrita fora dos limites da memória

Ocorre quando o código escreve dados em um endereço de memória fora do intervalo alocado para uma estrutura (array, buffer, objeto). O programa não valida o tamanho ou índice antes de escrever, permitindo sobrescrever memória adjacente — causando corrupção de dados, queda da aplicação ou execução arbitrária de código.

Example

Um formulário web que copia o valor de um campo do usuário para um buffer de 64 bytes sem verificar o comprimento: se o atacante enviar 200 caracteres, a escrita invade a memória vizinha e pode sobrescrever um ponteiro de função ou variável crítica.

How to mitigate

Sempre validar tamanhos de entrada antes de copiar (usar `strncpy` em vez de `strcpy`, ou bibliotecas seguras como `bounds-checking`); usar linguagens com verificação automática de limites (Java, Rust); aplicar testes de fuzzing e análise estática de código para detectar escritas desprotegidas.

CVE-2026-29035HIGHCivetWeb Heap/Stack Buffer Overflow via WebSocket permessage-deflate DecompressionEPSS 0.6%CVE-2021-33656—When setting font with malicous data by ioctl cmd PIO_FONT,kernel will write memory out of bounds.EPSS 0.6%CVE-2022-41187—Due to lack of proper memory management, when a victim opens a manipulated Wavefront Object (.obj, ObjTranslator.exe) file received from untEPSS 0.6%CVE-2022-41190—Due to lack of proper memory management, when a victim opens a manipulated AutoCAD (.dxf, TeighaTranslator.exe) file received from untrustedEPSS 0.6%CVE-2026-5731CRITICALMemory safety bugs fixed in Firefox ESR 115.34.1, Firefox ESR 140.9.1, Thunderbird ESR 140.9.1, Firefox 149.0.2 and Thunderbird 149.0.2EPSS 0.6%CVE-2023-32154HIGHMikrotik RouterOS RADVD Out-Of-Bounds Write Remote Code Execution VulnerabilityEPSS 0.6%CVE-2023-20819MEDIUMIn CDMA PPP protocol, there is a possible out of bounds write due to a missing bounds check. This could lead to remote escalation of privileEPSS 0.6%CVE-2026-32636MEDIUMImageMagick has a heap-buffer-overflow in NewXMLTree which could result in crashEPSS 0.6%CVE-2022-41191HIGHDue to lack of proper memory management, when a victim opens a manipulated Jupiter Tesselation (.jt, JTReader.x3d) file received from untrusEPSS 0.6%CVE-2022-41195—Due to lack of proper memory management, when a victim opens a manipulated EAAmiga Interchange File Format (.iff, 2d.x3d) file received fromEPSS 0.6%CVE-2026-84383CRITICALlibheif: Heap buffer overflow in `scale_nearest_neighbor()` via duplicate Alpha planes from nested `iden`/`auxl` itemsEPSS 0.6%CVE-2024-6259HIGHBT: HCI: adv_ext_report Improper discarding in adv_ext_reportEPSS 0.6%CVE-2021-3330HIGHRCE/DOS: Linked-list corruption leading to large out-of-bounds write while sorting for forged fragment list in ZephyrEPSS 0.6%CVE-2022-41199HIGHDue to lack of proper memory management, when a victim opens a manipulated Open Inventor File (.iv, vrml.x3d) file received from untrusted sEPSS 0.6%CVE-2024-6443MEDIUMzephyr: out-of-bound read in utf8_truncEPSS 0.6%CVE-2026-78008HIGHFireware OS Authenticated Buffer Overflow in wgagentEPSS 0.6%CVE-2024-30373HIGHKofax Power PDF JPF File Parsing Out-Of-Bounds Write Remote Code Execution VulnerabilityEPSS 0.6%CVE-2026-50538HIGHlibvncclient Tight decoder has an attacker-controlled heap out-of-bounds writeEPSS 0.6%CVE-2026-3548HIGHBuffer overflow in CRL number parsing in wolfSSLEPSS 0.6%CVE-2021-20233—A flaw was found in grub2 in versions prior to 2.06. Setparam_prefix() in the menu rendering code performs a length calculation on the assumEPSS 0.6%