CVE-2025-1713 – This vulnerability is a deadlock condition in X... (How to Fix)

Q: What is the severity of CVE-2025-1713?

CVE-2025-1713 has a CVSS score of 7.5 (HIGH). This vulnerability is a deadlock condition in Xen's interrupt remapping code for legacy PCI(-X) devices. When exploited, it can cause system instability or denial of service. It affects Xen hypervisor systems using interrupt remapping with legacy PCI(-X) hardware.

📋 TL;DR

This vulnerability is a deadlock condition in Xen's interrupt remapping code for legacy PCI(-X) devices. When exploited, it can cause system instability or denial of service. It affects Xen hypervisor systems using interrupt remapping with legacy PCI(-X) hardware.

💻 Affected Systems

Products:

Xen Hypervisor

Versions: All versions up to and including those before the fix

Operating Systems: Any OS running Xen hypervisor

Default Config Vulnerable: ⚠️ Yes

Notes: Only affects systems with interrupt remapping enabled and legacy PCI(-X) devices or bridges.

📦 What is this software?

Xen by Xen

View all CVEs affecting Xen →

⚠️ Risk & Real-World Impact

🔴

Worst Case

Complete system deadlock requiring hard reboot, potentially causing extended downtime in virtualized environments.

🟠

Likely Case

System instability or denial of service affecting virtual machines running on the hypervisor.

🟢

If Mitigated

Minimal impact if interrupt remapping is disabled or legacy PCI(-X) devices are not present.

🌐 Internet-Facing: LOW - Requires local access to the hypervisor or compromised guest VM.

🏢 Internal Only: MEDIUM - Could be exploited by malicious insiders or compromised guest VMs to disrupt virtualization infrastructure.

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ✅ No

Complexity: MEDIUM

Requires ability to trigger interrupt remapping operations on legacy PCI(-X) devices, typically from a privileged context.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Check Xen security advisory XSA-467 for specific patched versions

Vendor Advisory: https://xenbits.xenproject.org/xsa/advisory-467.html

Restart Required: Yes

Instructions:

1. Check current Xen version. 2. Apply security patches from your distribution's repository. 3. Reboot the hypervisor host to load patched kernel.

🔧 Temporary Workarounds

Disable interrupt remapping

linux

Disable interrupt remapping feature if legacy PCI(-X) devices are present

Add 'intremap=off' to Xen boot parameters

🧯 If You Can't Patch

Isolate systems from untrusted users and limit administrative access
Monitor for system instability or unexpected reboots that could indicate exploitation attempts

🔍 How to Verify

Check if Vulnerable:

Check Xen version and compare against patched versions in XSA-467 advisory

Check Version:

xl info | grep xen_version

Verify Fix Applied:

Verify Xen version after update matches patched version from advisory

📡 Detection & Monitoring

Log Indicators:

System lockups
Kernel panic messages related to interrupt handling
Unexpected hypervisor reboots

Network Indicators:

None - this is a local hypervisor issue

SIEM Query:

Search for: ("Xen" AND ("panic" OR "deadlock" OR "interrupt")) in system logs

📊 Metadata

CVE ID: CVE-2025-1713

CVSS v3 Score: 7.5 (HIGH)

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE: CWE-833

EPSS Score: 0.13% exploit probability (32.7th percentile)

Published: July 17, 2025

Last Updated: January 13, 2026

🔗 References

https://xenbits.xenproject.org/xsa/advisory-467.html Patch,Vendor Advisory
http://www.openwall.com/lists/oss-security/2025/02/27/1 Mailing List,Third Party Advisory
http://www.openwall.com/lists/oss-security/2025/02/27/3 Mailing List,Third Party Advisory
http://www.openwall.com/lists/oss-security/2025/02/28/1 Mailing List,Third Party Advisory
http://xenbits.xen.org/xsa/advisory-467.html Patch,Vendor Advisory

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🔗 Related Vulnerabilities

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