Weaknesses of type CWE-367

680 results

Condição de corrida entre verificação e uso (TOCTOU)

A aplicação verifica uma condição (ex: permissão, existência de arquivo) e depois usa o recurso baseado naquela verificação, mas entre os dois momentos outro processo pode mudar o estado do recurso. O atacante explora a janela de tempo para alterar o que foi verificado, contornando a validação.

Example

Um programa verifica se um arquivo existe e tem permissão de leitura, depois o abre para processar. Entre a verificação e a abertura, um atacante pode trocar o arquivo por um link simbólico apontando para um arquivo sensível do sistema. O programa abre o link sem perceber a mudança.

How to mitigate

Use operações atômicas que combinam verificação e uso em uma única chamada de sistema (ex: open() com flags exclusivas, fstat() após abrir arquivo). Em casos de acesso a dados compartilhados, implemente locks ou transações que impeçam alterações entre a validação e o uso do recurso.

CVE-2026-53800MEDIUMrsync < 3.5.0 Symlink Race Condition via --remove-source-filesEPSS 0.1%CVE-2026-53799HIGHrsync < 3.5.0 Symlink Race Condition via ACL/xattr ApplicationEPSS 0.1%CVE-2026-82430HIGHApache Storm Worker Launcher: Local Privilege Escalation to Root via Container Command Files Chowned to the TenantEPSS 0.1%CVE-2026-1880MEDIUMAn Incorrect Permission Assignment for Critical Resource vulnerability in the ASUS DriverHub update process allows privilege escalation due EPSS 0.1%CVE-2026-24191HIGHNVIDIA Display Driver for Windows contains a vulnerability where an attacker could cause a time-of-check time-of-use issue. A successful expEPSS 0.1%CVE-2022-27539HIGHPotential Time-of-Check to Time-of Use (TOCTOU) vulnerabilities have been identified in the HP BIOS for certain HP PC products which may allEPSS 0.1%CVE-2022-27538HIGHA potential Time-of-Check to Time-of-Use (TOCTOU) vulnerability has been identified in the BIOS for certain HP PC products which may allow aEPSS 0.1%CVE-2022-43777HIGHPotential Time-of-Check to Time-of Use (TOCTOU) vulnerabilities have been identified in the HP BIOS for certain HP PC products which may allEPSS 0.1%CVE-2022-30283HIGHIn UsbCoreDxe, tampering with the contents of the USB working buffer using DMA while certain USB transactions are in process leads to a TOCTEPSS 0.1%CVE-2022-31635HIGHPotential time-of-check to time-of-use (TOCTOU) vulnerabilities have been identified in the BIOS for certain HP PC products, which might allEPSS 0.1%CVE-2022-27541HIGHPotential Time-of-Check to Time-of Use (TOCTOU) vulnerabilities have been identified in the HP BIOS for certain HP PC products which may allEPSS 0.1%CVE-2022-31637HIGHPotential time-of-check to time-of-use (TOCTOU) vulnerabilities have been identified in the BIOS for certain HP PC products, which might allEPSS 0.1%CVE-2022-31639HIGHPotential time-of-check to time-of-use (TOCTOU) vulnerabilities have been identified in the BIOS for certain HP PC products, which might allEPSS 0.1%CVE-2026-34452MEDIUMClaude SDK for Python: Memory Tool Path Validation Race Condition Allows Sandbox EscapeEPSS 0.1%CVE-2024-39821MEDIUMZoom Workplace App for Windows and Zoom Rooms App for Windows - Race ConditionEPSS 0.1%CVE-2022-31642HIGHPotential vulnerabilities have been identified in the system BIOS of certain HP PC products, which might allow arbitrary code execution, escEPSS 0.1%CVE-2022-31636HIGHPotential time-of-check to time-of-use (TOCTOU) vulnerabilities have been identified in the BIOS for certain HP PC products, which might allEPSS 0.1%CVE-2022-31638HIGHPotential time-of-check to time-of-use (TOCTOU) vulnerabilities have been identified in the BIOS for certain HP PC products, which might allEPSS 0.1%CVE-2021-46795MEDIUMA TOCTOU (time-of-check to time-of-use) vulnerability exists where an attacker may use a compromised BIOS to cause the TEE OS to read memoryEPSS 0.1%CVE-2022-33905HIGHDMA transactions which are targeted at input buffers used for the AhciBusDxe software SMI handler could cause SMRAM corruption (a TOCTOU attEPSS 0.1%