Falhas do tipo CWE-416

5.043 resultados

Uso após liberação de memória

Ocorre quando o código tenta acessar (ler ou escrever) um bloco de memória que já foi liberado (free, delete). O programa mantém um ponteiro para a memória, mas o sistema operacional pode reatribuir essa região para outro uso, causando corrupção de dados, travamento ou execução de código arbitrário.

Exemplo

Um servidor web aloca memória para armazenar dados de sessão do usuário, depois libera essa memória quando a sessão encerra. Se uma thread continuar tentando acessar essa sessão após a liberação, pode ler dados de outra sessão ou sobrescrever dados críticos de outro processo.

Como mitigar

Sempre anule ponteiros após liberar memória (ptr = NULL), use variáveis de controle para rastrear estado de alocação, implemente gerenciamento automático de memória quando possível (smart pointers em C++), e execute testes com sanitizers (AddressSanitizer, Valgrind) durante desenvolvimento e CI/CD.

CVE-2023-51551HIGHFoxit PDF Reader AcroForm Signature Use-After-Free Remote Code Execution VulnerabilityEPSS 0.4%CVE-2026-79039HIGHUse after free in Mobile in Google Chrome on on iOS prior to 152.0.7977.65 allowed a remote attacker to execute arbitrary code outside the sEPSS 0.4%CVE-2024-11525HIGHIrfanView DXF File Parsing Use-After-Free Remote Code Execution VulnerabilityEPSS 0.4%CVE-2026-78913HIGHUse after free in Chromoting in Google Chrome prior to 152.0.7977.65 allowed a remote attacker to potentially execute arbitrary code outsideEPSS 0.4%CVE-2026-13787HIGHUse after free in Chromoting in Google Chrome on Windows prior to 150.0.7871.47 allowed a remote attacker to execute arbitrary code via maliEPSS 0.4%CVE-2026-79194HIGHUse after free in Chromoting in Google Chrome on on Windows prior to 152.0.7977.65 allowed a remote attacker to execute arbitrary code outsiEPSS 0.4%CVE-2025-62504MEDIUMEnvoy Lua filter use-after-free when oversized rewritten response body causes crashEPSS 0.4%CVE-2026-13071HIGHServer-Side JavaScript Aggregation Expression Memory Safety Issue Leading to Process TerminationEPSS 0.4%CVE-2026-56434HIGHNGINX ngx_http_ssi_module vulnerabilityEPSS 0.4%CVE-2022-41663HIGHA vulnerability has been identified in JT2Go (All versions < V14.1.0.4), Teamcenter Visualization V13.2 (All versions < V13.2.0.12), TeamceEPSS 0.4%CVE-2024-0752MEDIUMA use-after-free crash could have occurred on macOS if a Firefox update were being applied on a very busy system. This could have resulted iEPSS 0.4%CVE-2023-3567HIGHKernel: use after free in vcs_read in drivers/tty/vt/vc_screen.c due to raceEPSS 0.4%CVE-2024-34100HIGHUse-After-Free vulnerability in the latest Adobe Acrobat Reader DC when open malicious PDF fileEPSS 0.4%CVE-2024-37007HIGHMultiple ZDI Vulnerabilities in Autodesk AutoCAD and certain AutoCAD-based productsEPSS 0.4%CVE-2023-4921HIGHUse-after-free in Linux kernel's net/sched: sch_qfq componentEPSS 0.4%CVE-2026-46523MEDIUMImageMagick: Use-After-Free in MSL decoder.EPSS 0.4%CVE-2019-3896HIGHA double-free can happen in idr_remove_all() in lib/idr.c in the Linux kernel 2.6 branch. An unprivileged local attacker can use this flaw fEPSS 0.4%CVE-2023-39198HIGHKernel: qxl: race condition leading to use-after-free in qxl_mode_dumb_create()EPSS 0.4%CVE-2025-53730HIGHMicrosoft Office Visio Remote Code Execution VulnerabilityEPSS 0.4%CVE-2023-36565HIGHMicrosoft Office Graphics Elevation of Privilege VulnerabilityEPSS 0.4%