https://xint.io/blog/copy-fail-linux-distributions
A newly discovered Linux vulnerability, dubbed “copy_file_range” or “CopyFail,” is sending shockwaves through the cybersecurity community after researchers found it can be exploited to grant attackers full root access on several major Linux distributions. The flaw resides in the Linux kernel’s copy_file_range system call, a feature designed to efficiently copy data between files. Security researchers have confirmed that the vulnerability can be leveraged by local attackers to escalate their privileges, potentially giving them complete control over affected systems.
The flaw impacts a wide range of popular Linux distributions, including widely deployed enterprise and consumer systems. Once exploited, an attacker who already has limited access to a system can use the vulnerability to bypass security restrictions and elevate their privileges to root level – the highest level of access on a Linux system. This type of privilege escalation attack is particularly dangerous in shared hosting environments, cloud infrastructure, and corporate networks where multiple users operate on the same underlying system.
Security teams and system administrators are being urged to apply patches immediately as they become available from their respective distribution maintainers. Major Linux vendors are actively working to push updates to address the vulnerability. In the meantime, organisations are advised to monitor systems for suspicious privilege escalation activity, limit local user access where possible, and follow their distribution’s security advisories closely for remediation guidance.