CRITICAL Score: 9.8/10

Vulnerability Summary

A critical Remote Code Execution (RCE) vulnerability has been discovered in the Linux Kernel's SMB server (ksmbd). This flaw allows unauthenticated, remote attackers to execute arbitrary code on vulnerable systems with kernel privileges. If you are running a file server or sharing files via SMB on Linux, your infrastructure is at immediate risk.

Technical Analysis

  • CVE ID: CVE-2025-0102
  • Affected Component: ksmbd (Linux Kernel SMB Server)
  • Attack Vector: Network (No Auth Required)
  • Status: Active Exploitation Detected

How to Fix

1. Apply Vendor Patches: The primary fix is to update your Linux Kernel immediately. Check your distribution's security advisory.

sudo apt update && sudo apt upgrade

2. Mitigation (If you cannot patch):
If patching is not possible right now, you must disable the ksmbd service or block port 445 on your firewall.

sudo systemctl stop ksmbd
sudo ufw deny 445/tcp
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