The qemuAgentCommand function in libvirt before 1.1.1, when a guest agent is not…
Priority LOW 24Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Medium
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
The qemuAgentCommand function in libvirt before 1.1.1, when a guest agent is not configured, allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via vectors related to "agent based cpu (un)plug," as demonstrated by the "virsh vcpucount foobar --guest" command.
Why it matters now
EPSS 0.02202 82nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:redhat:libvirt:*:*:*:*:*:*:*:* | up to 1.1.0 | Vulnerable | Red Hat |
| cpe:2.3:a:redhat:libvirt:1.0.0:*:*:*:*:*:*:* | 1.0.0 | Vulnerable | Red Hat |
| cpe:2.3:a:redhat:libvirt:1.0.1:*:*:*:*:*:*:* | 1.0.1 | Vulnerable | Red Hat |
| cpe:2.3:a:redhat:libvirt:1.0.2:*:*:*:*:*:*:* | 1.0.2 | Vulnerable | Red Hat |
| cpe:2.3:a:redhat:libvirt:1.0.3:*:*:*:*:*:*:* | 1.0.3 | Vulnerable | Red Hat |
| cpe:2.3:a:redhat:libvirt:1.0.4:*:*:*:*:*:*:* | 1.0.4 | Vulnerable | Red Hat |
| cpe:2.3:a:redhat:libvirt:1.0.5:*:*:*:*:*:*:* | 1.0.5 | Vulnerable | Red Hat |
| cpe:2.3:a:redhat:libvirt:1.0.6:*:*:*:*:*:*:* | 1.0.6 | Vulnerable | Red Hat |
- cpe:2.3:a:redhat:libvirt:*:*:*:*:*:*:*:* Versions up to 1.1.0 Vulnerable ·Red Hat
- cpe:2.3:a:redhat:libvirt:1.0.0:*:*:*:*:*:*:* Versions 1.0.0 Vulnerable ·Red Hat
- cpe:2.3:a:redhat:libvirt:1.0.1:*:*:*:*:*:*:* Versions 1.0.1 Vulnerable ·Red Hat
- cpe:2.3:a:redhat:libvirt:1.0.2:*:*:*:*:*:*:* Versions 1.0.2 Vulnerable ·Red Hat
- cpe:2.3:a:redhat:libvirt:1.0.3:*:*:*:*:*:*:* Versions 1.0.3 Vulnerable ·Red Hat
- cpe:2.3:a:redhat:libvirt:1.0.4:*:*:*:*:*:*:* Versions 1.0.4 Vulnerable ·Red Hat
- cpe:2.3:a:redhat:libvirt:1.0.5:*:*:*:*:*:*:* Versions 1.0.5 Vulnerable ·Red Hat
- cpe:2.3:a:redhat:libvirt:1.0.6:*:*:*:*:*:*:* Versions 1.0.6 Vulnerable ·Red Hat
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
Not affected: 2 products
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 6
Timeline
- 2026-10-02 Threatist record created from CVE-2013-4154
- 2026-10-03 Alias added: GHSA-99hg-84w9-fwh7
References
Patch 2
More Red Hat Libvirt vulnerabilities
- TI-2016-04328 libvirt before 2.0.0 improperly disables password checking when the password on a VNC… CVSS 3.0CRITICAL 9.8
- TI-2019-07455 Incorrect permission assignment in libvirt CVSS 3.0HIGH 8.8
- TI-2013-03857 The virConnectDomainXMLToNative API function in libvirt 1.1.0 through 1.1.3 checks for… CVSS 2.0HIGH 8.5
- TI-2018-04154 qemu/qemu_monitor.c in libvirt allows attackers to cause a denial of service (memory… CVSS 3.0HIGH 7.5
- TI-2017-14571 libvirt version 2.3.0 and later is vulnerable to a bad default configuration of… CVSS 3.1HIGH 8.1
- TI-2013-00105 Use-after-free vulnerability in the virNetMessageFree function in… CVSS 2.0MEDIUM 6.8
Sources
- CVE-2013-4154 · CVE Program
- CVE-2013-4154 · NVD
- FIRST EPSS
- GHSA-99hg-84w9-fwh7 · GitHub Advisory Database · CC BY 4.0
- CVE-2013-4154 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences