Falhas do tipo CWE-416

6.170 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-2019-13720HIGHUse after free in WebAudio in Google Chrome prior to 78.0.3904.87 allowed a remote attacker to potentially exploit heap corruption via a craEPSS 49.4%KEVCVE-2022-47939CRITICALAn issue was discovered in ksmbd in the Linux kernel 5.15 through 5.19 before 5.19.2. fs/ksmbd/smb2pdu.c has a use-after-free and OOPS for SEPSS 49.3%CVE-2020-24437HIGHAcrobat Reader DC Use-After-Free Vulnerability Could Lead to Arbitrary Code ExecutionEPSS 46.5%CVE-2024-30080CRITICALMicrosoft Message Queuing (MSMQ) Remote Code Execution VulnerabilityEPSS 42.9%CVE-2023-29336HIGHWin32k Elevation of Privilege VulnerabilityEPSS 41.2%KEVCVE-2014-0496HIGHUse-after-free vulnerability in Adobe Reader and Acrobat 10.x before 10.1.9 and 11.x before 11.0.06 on Windows and Mac OS X allows attackersEPSS 40.0%KEVCVE-2021-34850HIGHThis vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit PDF Reader 11.0.0.49893. User interaEPSS 38.3%CVE-2025-21760HIGHndisc: extend RCU protection in ndisc_send_skb()EPSS 38.0%CVE-2021-22930—Node.js before 16.6.0, 14.17.4, and 12.22.4 is vulnerable to a use after free attack where an attacker might be able to exploit the memory cEPSS 36.5%CVE-2021-37975HIGHUse after free in V8 in Google Chrome prior to 94.0.4606.71 allowed a remote attacker to potentially exploit heap corruption via a crafted HEPSS 34.9%KEVCVE-2022-42867HIGHA use after free issue was addressed with improved memory management. This issue is fixed in Safari 16.2, tvOS 16.2, macOS Ventura 13.1, iOSEPSS 34.8%CVE-2023-21674HIGHWindows Advanced Local Procedure Call (ALPC) Elevation of Privilege VulnerabilityEPSS 34.2%KEVCVE-2020-9715HIGHAdobe Acrobat and Reader versions 2020.009.20074 and earlier, 2020.001.30002, 2017.011.30171 and earlier, and 2015.006.30523 and earlier havEPSS 33.3%KEVCVE-2021-30633CRITICALUse after free in Indexed DB API in Google Chrome prior to 93.0.4577.82 allowed a remote attacker who had compromised the renderer process tEPSS 33.2%KEVCVE-2011-0346HIGHUse-after-free vulnerability in the ReleaseInterface function in MSHTML.DLL in Microsoft Internet Explorer 6, 7, and 8 allows remote attackeEPSS 31.0%CVE-2022-2998HIGHUse after free in Browser Creation in Google Chrome prior to 104.0.5112.101 allowed a remote attacker who had convinced a user to engage in EPSS 30.3%CVE-2024-38193HIGHWindows Ancillary Function Driver for WinSock Elevation of Privilege VulnerabilityEPSS 28.7%KEVCVE-2024-1086HIGHUse-after-free in Linux kernel's netfilter: nf_tables componentEPSS 28.1%KEVCVE-2023-36802HIGHMicrosoft Streaming Service Proxy Elevation of Privilege VulnerabilityEPSS 27.9%KEVCVE-2023-28205HIGHA use after free issue was addressed with improved memory management. This issue is fixed in Safari 16.4.1, iOS 15.7.5 and iPadOS 15.7.5, iOEPSS 27.1%KEV