LOW CVSS 3.8
Published: 2026-06-26

CVE-2026-13322

redhat openshift_virtualization Security Advisory (CVE-2026-13322)
↗ Official NIST NVD Record
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2026-13322 impacting redhat openshift_virtualization. Evaluated with CVSS Base Score of 3.8 (LOW).

Original NVD Description

Source: NIST NVD
A flaw was found in KubeVirt's downward metrics virtio-serial server. The server reads guest requests using textproto.Reader.ReadLine(), which buffers input indefinitely until a newline character is received, with no length limit or read deadline. A user with access to a VM guest that has the downward metrics virtio-serial device configured can write a continuous byte stream to the device, causing unbounded memory allocation in the virt-handler process until it is OOM-killed.

📊 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
Low (PR:L)
Standard user access required
User Interaction
None (UI:N)
Zero human interaction required
Scope
Changed (S:C)
Impacts components beyond caller authority
Confidentiality
None (C:N)
No data confidentiality impact
Integrity
None (I:N)
No system modification impact
Availability
Low (A:L)
Partial service performance degradation

🎯 Affected Versions Matrix

Affected Product redhat / openshift_virtualization
Affected Versions *
Weakness Enumeration CWE-770

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-2026-13322 impacting redhat openshift_virtualization.

⚡ Nuclei Detection Template (YAML) cve-2026-13322.yaml
id: cve-2026-13322

info:
  name: redhat openshift_virtualization - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: low
  description: |
    Automated signature & scanner for CVE-2026-13322 affecting redhat openshift_virtualization.
    Evaluation: A flaw was found in KubeVirt's downward metrics virtio-serial server. The server reads guest requests using textproto.Reader.ReadLine(), which bu...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2026-13322
  classification:
    cvss-metrics: CVSS:3.1/CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L
    cvss-score: 3.8
    cve-id: CVE-2026-13322
    cwe-id: CWE-770
  tags: cve,cve-2026-13322,redhat,openshift_virtualization,low

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "openshift_virtualization"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-2026-13322.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2026-13322
# Target: redhat openshift_virtualization | CVSS: 3.8 (LOW)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-2026-13322 (redhat openshift_virtualization)...")
    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 openshift_virtualization 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-2026-13322.sh
# Recommended Remediation & Patching Commands for CVE-2026-13322
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install openshift_virtualization 2>/dev/null || \
sudo dnf upgrade openshift_virtualization 2>/dev/null || \
sudo yum update openshift_virtualization

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

# 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.

🔗 Verified Technical References

Authorities
  • No records filed in this category.
Technical Analysis
  • No records filed in this category.

❓ Frequently Asked Questions (FAQ) & Remediation Guide

How do I fix CVE-2026-13322 in redhat openshift_virtualization?

Review vendor-specific security notices and update redhat openshift_virtualization 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-2026-13322?

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-2026-13322?

CVE-2026-13322 is classified with a CVSS 3.1 Base Score of 3.8 (LOW). Check the metric breakdown above for attack vector requirements.

Risk Snapshot
3.8
LOW SEVERITY
CVE ID CVE-2026-13322
Weakness CWE-770
Vendor redhat
Product openshift_virtualization
Published 2026-06-26
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L