Falhas do tipo CWE-416

5.129 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-2025-55688HIGHWindows PrintWorkflowUserSvc Elevation of Privilege VulnerabilityEPSS 0.3%CVE-2023-47233MEDIUMThe brcm80211 component in the Linux kernel through 6.5.10 has a brcmf_cfg80211_detach use-after-free in the device unplugging (disconnect tEPSS 0.3%CVE-2025-14860CRITICALUse-after-free in the Disability Access APIs componentEPSS 0.3%CVE-2026-21908HIGHJunos OS and Junos OS Evolved: Use after free vulnerability In 802.1X authentication daemon can cause crash of the dot1xd processEPSS 0.3%CVE-2026-11650HIGHUse after free in V8 in Google Chrome prior to 149.0.7827.103 allowed a remote attacker to execute arbitrary code inside a sandbox via a craEPSS 0.3%CVE-2021-3700—A use-after-free vulnerability was found in usbredir in versions prior to 0.11.0 in the usbredirparser_serialize() in usbredirparser/usbrediEPSS 0.3%CVE-2026-11649HIGHUse after free in V8 in Google Chrome prior to 149.0.7827.103 allowed a remote attacker to execute arbitrary code inside a sandbox via a craEPSS 0.3%CVE-2022-49479HIGHmt76: fix tx status related use-after-free race on station removalEPSS 0.3%CVE-2021-4028—A flaw in the Linux kernel's implementation of RDMA communications manager listener code allowed an attacker with local access to setup a soEPSS 0.3%CVE-2024-8818HIGHPDF-XChange Editor U3D File Parsing Use-After-Free Remote Code Execution VulnerabilityEPSS 0.3%CVE-2024-9764HIGHTungsten Automation Power PDF PDF File Parsing Use-After-Free Remote Code Execution VulnerabilityEPSS 0.3%CVE-2026-20644MEDIUMThe issue was addressed with improved memory handling. This issue is fixed in Safari 26.3, iOS 18.7.5 and iPadOS 18.7.5, iOS 26.3 and iPadOSEPSS 0.3%CVE-2026-12329MEDIUMMemory safety bug fixed in Thunderbird ESR 140.12EPSS 0.3%CVE-2022-49470HIGHBluetooth: btmtksdio: fix use-after-free at btmtksdio_recv_eventEPSS 0.3%CVE-2022-43651HIGHBentley View SKP File Parsing Use-After-Free Remote Code Execution VulnerabilityEPSS 0.3%CVE-2026-13807HIGHUse after free in Import in Google Chrome on iOS prior to 150.0.7871.47 allowed a remote attacker who convinced a user to engage in specificEPSS 0.3%CVE-2026-10952HIGHUse after free in Chrome for iOS in Google Chrome on iOS prior to 149.0.7827.53 allowed a remote attacker to potentially exploit heap corrupEPSS 0.3%CVE-2023-4208HIGHUse-after-free in Linux kernel's net/sched: cls_u32 componentEPSS 0.3%CVE-2022-49063HIGHice: arfs: fix use-after-free when freeing @rx_cpu_rmapEPSS 0.3%CVE-2026-10951HIGHUse after free in Autofill in Google Chrome on iOS prior to 149.0.7827.53 allowed a remote attacker who convinced a user to engage in specifEPSS 0.3%