Falhas do tipo CWE-457

245 resultados

Uso de variável não inicializada

Quando o código usa uma variável antes de atribuir um valor válido a ela, o programa pode ler lixo de memória (valores aleatórios deixados por outras operações). Isso leva a comportamentos imprevisíveis, falhas, ou no pior caso, a exploração de segurança quando o atacante consegue controlar o que está naquela posição de memória.

Exemplo

Um buffer local declarado em C sem inicialização (char buf[256];) é usado logo depois em memcpy ou sprintf. Se o conteúdo anterior daquela pilha contiver dados sensíveis ou endereços, um vazamento de informação ou corrupção de fluxo de controle pode ocorrer.

Como mitigar

Inicialize sempre as variáveis na declaração (char buf[256] = {0}; ou int x = 0;). Use análise estática (linters, compiler warnings, ferramentas como clang-analyzer) para detectar uso de variáveis não inicializadas antes do deploy. Em linguagens gerenciadas como Java/C#, o compilador já força isso.

CVE-2025-58466LOWQTS, QuTS heroEPSS 0.5%CVE-2026-78935CRITICALUse of uninitialized variable in Mobile in Google Chrome on on iOS prior to 152.0.7977.65 allowed a remote attacker to potentially execute aEPSS 0.5%CVE-2026-14405CRITICALUninitialized Use in V8 in Google Chrome prior to 150.0.7871.46 allowed a remote attacker to execute arbitrary code inside a sandbox via a cEPSS 0.5%CVE-2026-17707MEDIUMUninitialized Use in Media in Google Chrome on Windows prior to 151.0.7922.72 allowed a remote attacker who had compromised the renderer proEPSS 0.5%CVE-2026-17667MEDIUMUninitialized Use in ANGLE in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to leak cross-origin data via a crafted HTML paEPSS 0.5%CVE-2026-17714MEDIUMUninitialized Use in ANGLE in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to obtain potentially sensitive information froEPSS 0.5%CVE-2026-17668MEDIUMUninitialized Use in ANGLE in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to leak cross-origin data via a crafted HTML paEPSS 0.5%CVE-2023-42062HIGHPDF-XChange Editor U3D File Parsing Uninitialized Variable Remote Code Execution VulnerabilityEPSS 0.5%CVE-2023-42056LOWPDF-XChange Editor U3D File Parsing Uninitialized Variable Information Disclosure VulnerabilityEPSS 0.5%CVE-2025-40575MEDIUMA vulnerability has been identified in SCALANCE LPE9403 (6GK5998-3GS00-2AC2) (All versions < V4.0 HF0). Affected devices do not properly valEPSS 0.5%CVE-2023-42046LOWPDF-XChange Editor J2K File Parsing Uninitialized Variable Information Disclosure VulnerabilityEPSS 0.5%CVE-2026-15132HIGHUninitialized Use in V8 in Google Chrome prior to 150.0.7871.115 allowed a remote attacker to execute arbitrary code inside a sandbox via a EPSS 0.5%CVE-2023-42079LOWPDF-XChange Editor J2K File Parsing Uninitialized Variable Information Disclosure VulnerabilityEPSS 0.4%CVE-2023-42048LOWPDF-XChange Editor J2K File Parsing Uninitialized Variable Information Disclosure VulnerabilityEPSS 0.4%CVE-2025-2024HIGHTrimble SketchUp SKP File Parsing Uninitialized Variable Remote Code Execution VulnerabilityEPSS 0.4%CVE-2023-39484LOWPDF-XChange Editor PDF File Parsing Uninitialized Variable Information Disclosure VulnerabilityEPSS 0.4%CVE-2024-10934CRITICALOpenBSD NFS double-free vulnerabilityEPSS 0.4%CVE-2026-17689MEDIUMUninitialized Use in ANGLE in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to leak cross-origin data via a crafted HTML paEPSS 0.4%CVE-2022-40510CRITICALBuffer copy without checking size of input in Audio.EPSS 0.4%CVE-2023-38088HIGHKofax Power PDF printf Uninitialized Variable Remote Code Execution VulnerabilityEPSS 0.4%