MEDIUM CVSS 6.8
Published: 2026-06-29

CVE-2026-13595

redhat hardened_images Security Advisory (CVE-2026-13595)
↗ Official NIST NVD Record
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2026-13595 impacting redhat hardened_images. Evaluated with CVSS Base Score of 6.8 (MEDIUM).

Original NVD Description

Source: NIST NVD
A flaw was found in the libblkid library of util-linux. During nested partition probing, the BSD, Minix, Solaris x86, and UnixWare partition probers cache a raw pointer to a parent partition entry in a dynamically allocated array. When subsequent partition additions cause the array to be reallocated, this pointer becomes stale, leading to a heap use-after-free read. An attacker who can present a crafted block device image (for example, via USB insertion or a loop-mounted disk image) can trigger this flaw without user interaction, as libblkid is invoked automatically by udev/udisks as root on block-device hot-plug events. This could lead to limited information disclosure or denial of service.

📊 CVSS v3.1 Metric Breakdown

Attack Vector
Local (AV:L)
Requires local system execution permissions
Attack Complexity
Low (AC:L)
No specialized conditions required
Privileges Required
None (PR:N)
Unauthenticated execution
User Interaction
None (UI:N)
Zero human interaction required
Scope
Unchanged (S:U)
Confined to same security context
Confidentiality
Low (C:L)
Partial information leakage
Integrity
None (I:N)
No system modification impact
Availability
High (A:H)
Total denial of service or shutdown

🎯 Affected Versions Matrix

Affected Product redhat / hardened_images
Affected Versions -
Weakness Enumeration CWE-416

Security Research Arsenal: Nuclei Detection Template & PoC Exploit Probe

High-Intent Research Tool

Ready-to-use security scanner signatures, active verification probe skeletons, and remediation playbooks for CVE-2026-13595 impacting redhat hardened_images.

⚡ Nuclei Detection Template (YAML) cve-2026-13595.yaml
id: cve-2026-13595

info:
  name: redhat hardened_images - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: medium
  description: |
    Automated signature & scanner for CVE-2026-13595 affecting redhat hardened_images.
    Evaluation: A flaw was found in the libblkid library of util-linux. During nested partition probing, the BSD, Minix, Solaris x86, and UnixWare partition probers c...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2026-13595
  classification:
    cvss-metrics: CVSS:3.1/CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
    cvss-score: 6.8
    cve-id: CVE-2026-13595
    cwe-id: CWE-416
  tags: cve,cve-2026-13595,redhat,hardened_images,medium

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "hardened_images"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-2026-13595.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2026-13595
# Target: redhat hardened_images | CVSS: 6.8 (MEDIUM)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-2026-13595 (redhat hardened_images)...")
    headers = {
        "User-Agent": "CyberVault-Audit-Scanner/2.0",
        "Accept": "*/*"
    }
    try:
        r = requests.get(f"{target_url.rstrip('/')}/", headers=headers, timeout=8, verify=False)
        print(f"[+] Server Response: HTTP {r.status_code} | Server Banner: {r.headers.get('Server', 'Unknown')}")
        if r.status_code < 500:
            print(f"[!] Target reachable. Verify version against redhat hardened_images scope (-).")
        return True
    except Exception as e:
        print(f"[-] Connection Error: {e}")
        return False

if __name__ == '__main__':
    url = sys.argv[1] if len(sys.argv) > 1 else "http://localhost:8080"
    verify_vulnerability(url)
🛡️ Quick Patch & Remediation Script (Bash) patch_cve-2026-13595.sh
# Recommended Remediation & Patching Commands for CVE-2026-13595
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install hardened_images 2>/dev/null || \
sudo dnf upgrade hardened_images 2>/dev/null || \
sudo yum update hardened_images

# 2. Inspect installed package versions for vulnerable scope:
dpkg -l | grep -i hardened_images 2>/dev/null || rpm -qa | grep -i hardened_images

# 3. Docker container & image vulnerability scan:
docker scan $(docker ps -q) 2>/dev/null || echo "Verify upstream base images in Dockerfile."

🛡️ Remediation & Security Action

  • Authoritative Guidance: Follow distribution-specific vendor security notices. Advisory status and package patches vary by distribution release.
  • Verification: Inspect installed binary packages and package manager versions for affected component releases.
  • Upstream Status: Upgrade to verified non-backdoored upstream versions or roll back to known-clean stable releases.
⚠️ Disclaimer: Follow vendor-specific advisories for your operating system. CyberVault does not fabricate unsupported remediation scripts.

❓ Frequently Asked Questions (FAQ) & Remediation Guide

How do I fix CVE-2026-13595 in redhat hardened_images?

Review vendor-specific security notices and update redhat hardened_images packages to the latest patched release immediately. If immediate upgrading is restricted by change windows, isolate affected network ports and enforce least-privilege access boundaries.

Is there an active exploit or public PoC for CVE-2026-13595?

No weaponized public exploit has been confirmed in public threat streams yet. Continuous surveillance is active across GitHub and security feeds.

What is the CVSS 3.1 severity rating and impact for CVE-2026-13595?

CVE-2026-13595 is classified with a CVSS 3.1 Base Score of 6.8 (MEDIUM). Check the metric breakdown above for attack vector requirements.

Risk Snapshot
6.8
MEDIUM SEVERITY
CVE ID CVE-2026-13595
Weakness CWE-416
Vendor redhat
Product hardened_images
Published 2026-06-29
Vector CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H