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GitHubmany-hat-group/ubuntu-cve-2026-3888-patcher

Ubuntu-CVE-2026-3888-patcher

This is a script designed for deployment on ubuntu instances patching the CVE-2026-3888 exploit

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5 months agoNot yet reviewed
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🛡️ CVE-2026-3888 Remediation Script

Many Hat Group Security Advisory Tool

Overview

This script has been developed by Many Hat Group to quickly identify and remediate systems affected by CVE-2026-3888 on Ubuntu environments.

It is designed for use across managed fleets, providing:

  • Automated detection
  • Version-aware patching
  • Safe execution controls
  • Clear logging and notification

What This Script Does

When executed, the script performs the following actions:

1. Administrator Acknowledgement

  • Displays a splash screen with terms of use
  • Requires explicit confirmation (yes) before proceeding
  • Supports non-interactive mode via --yes

2. Detects System Information

  • Reads /etc/os-release
  • Confirms the system is Ubuntu
  • Identifies:
    • Ubuntu version
    • Codename (e.g. jammy, noble)
    • Hostname

3. Checks Vulnerability Status

  • Verifies if snapd is installed
  • Retrieves the installed version
  • Compares it against the known fixed version for CVE-2026-3888

If:

  • Not installed → system is not affected
  • Already patched → script exits safely

4. Applies the Correct Patch Method

The script intelligently selects the correct remediation path:

Standard Ubuntu Releases (Jammy, Noble, etc.)

Uses: apt-get update apt-get install --only-upgrade snapd

Older Releases (Focal, Bionic, Xenial)

Uses Ubuntu Pro / ESM where required: pro fix CVE-2026-3888

5. Verifies Patch Success

  • Re-checks installed snapd version
  • Confirms it meets or exceeds the fixed version

6. Logging and Notifications

The script reports outcomes via:

  • Console output
  • Syslog (logger)
  • Email (optional)

Usage

Interactive Mode

sudo ./patch_cve_2026_3888_v2.sh

Non-Interactive

sudo ./patch_cve_2026_3888_v2.sh --yes --email [email protected]

One-Line Execution

curl -fsSL https://raw.githubusercontent.com/Many-Hat-Group/Ubuntu-CVE-2026-3888-patcher/main/patch_cve_2026_3888.sh | sudo bash -s -- --yes --email [email protected]

Supported Ubuntu Versions

25.10 questing (apt)
24.04 noble (apt)
22.04 jammy (apt)
20.04 focal (Ubuntu Pro)
18.04 bionic (Ubuntu Pro)
16.04 xenial (Ubuntu Pro)

Disclaimer

Provided by Many Hat Group. Test before production use.

Version: 1.0
Maintained by: Many Hat Group

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