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CVE-2021

Sploitus • September 7, 2026

«Специфическая для Ubuntu проблема в файловой системе overlayfs в ядре Linux, связанная с некорректной проверкой применения возможностей файловой системы в отношении пространств имён пользователей. Локальный злоумышленник мог использовать это для получения повышенных привилегий из-за патча, перенесённого в Ubuntu, который разрешал монтирование overlayfs без привилегий.» Ubuntu Security

Я не являюсь автором этого эксплойта. Я не вносил никаких изменений в PoC, найденный здесь:

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This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Multiple Critical CVEs Exploited in Cybersecurity Attacks A series of vulnerabilities, including CVE-2025-49144, CVE-2025-31702, and CVE-2026-46333, have been identified, affecting systems like Notepad++ and FortiWeb devices. These vulnerabilities allow for local privilege escalation, SQL injection, and remote code execution. Attackers exploit these flaws through various methods, including manipulating installation paths and unauthorized file uploads. The scope of impact includes potentially millions of users and systems that have not yet applied necessary patches. Current reports indicate active exploitation of these vulnerabilities, particularly in the wild. Security professionals are urged to prioritize updates and implement mitigation strategies to protect their systems. Tools and proof-of-concept (PoC) exploits are publicly available, increasing the urgency for remediation. 100 sources 75

Extracted Entities

CVE-2021

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Extracted Entities

Attack Types (1)

Companies (1)

CWE Weaknesses (1)

MITRE ATT&CK (1)

Platforms (1)