Vulnerability Snapshot
CVE-2016-8649 is rated CRITICAL — exploitation is trivial or already observed in the wild and impact is severe. Patch immediately, not on the next maintenance window.
Affected technology: lxc.
Executive Summary
lxc-attach in LXC before 1.0.9 and 2.x before 2.0.6 allows an attacker inside of an unprivileged container to use an inherited file descriptor, of the host's /proc, to access the rest of the host's filesystem via the openat() family of syscalls.
Why It Matters
CVE-2016-8649 is rated CRITICAL severity, requiring immediate attention from security teams.
CVSS Base Score: 9.1/10
Affected Technologies
Vendors: linuxcontainers
Products: lxc
🛡️What Defenders Should Check
Use Vulnios to continuously monitor your exposure to CVE-2016-8649 and similar vulnerabilities.
References & Sources
How Vulnios Detects This
Vulnios scans for this vulnerability using Trivy and Grype for CVE matching against your container images and OS package manifests. Run a scan against your environment to see whether you are exposed; findings are linked back to the original CVE record so triage starts with the patch path already known.
AI Security Advisor
Powered by Gemini
Get AI-powered security recommendations tailored to this specific threat — including risk assessment, detection guidance, MITRE ATT&CK mapping, and actionable remediation steps.
Affected Products
Sources
Related Threat Alerts
- Critical Vulnerability: CVE-2017-9521 — cisco, commscope — dpc3939_firmware, dpc3939
- Critical Vulnerability: CVE-2017-4919 — vmware — vcenter_server
- Critical Vulnerability: CVE-2017-8390 — paloaltonetworks — pan-os
- Critical Vulnerability: CVE-2017-12199 — etoilewebdesign — ultimate_product_catalog
- Critical Vulnerability: CVE-2017-4923 — vmware — vcenter_server
- Critical Vulnerability: CVE-2017-1383 — ibm — infosphere_information_server, softlayer
Frequently Asked Questions
What is CVE-2016-8649?
CVE-2016-8649 is a critical-severity vulnerability tracked under the Common Vulnerabilities and Exposures program. lxc-attach in LXC before 1.0.9 and 2.x before 2.0.6 allows an attacker inside of an unprivileged container to use an inherited file descriptor, of the host's /proc, to access the rest of the host's fi
Am I affected?
Check whether your environment runs lxc. If you operate any of those, treat yourself as in scope until you have evidence otherwise. A Vulnios scan will identify the exact assets carrying the affected version.
How urgent is the response?
Critical: do not wait for your normal patch cycle. Verify exposure today, apply the vendor patch immediately, and add detection rules for any post-exploit indicators.
How do I remediate?
Apply the vendor patch listed in the upstream advisory linked under Sources. If the patch is not yet available, follow the vendor-supplied workaround (often a config flag or feature disable) and add detections for the published exploit pattern in your SIEM. Re-scan after the patch lands to confirm the finding clears.
Where can I track exploitation activity?
Watch CISA's Known Exploited Vulnerabilities catalog for CVE-2016-8649. Cross-reference with public exploit databases and your own SIEM/IDS for indicator-of-compromise patterns. Vulnios tracks KEV status automatically and surfaces it on the asset findings view.
How does Vulnios help with this?
Vulnios continuously cross-references your asset inventory against the live CVE feed (NVD, vendor advisories, CISA KEV, and curated OSINT). When a new CVE matches your environment, you get a prioritized finding with the severity, KEV status, exploit-prediction (EPSS), and a direct path to the vendor patch. You can start a free scan from the homepage.
Protect Your Organization
Monitor CVEs, scan for vulnerabilities, and get real-time threat alerts — all in one platform.
Get instant alerts on Telegram
Join our public channel for real-time critical CVE alerts.
Follow @vulnios