The fbld instruction emulation in Xen 3.3.x through 4.3.x does not use the correct…
Priority LOW 11CWE-200Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- Partial · None · None
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-200.
Summary
The fbld instruction emulation in Xen 3.3.x through 4.3.x does not use the correct variable for the source effective address, which allows local HVM guests to obtain hypervisor stack information by reading the values used by the instruction.
Why it matters now
EPSS 0.00395 33rd percentileScored 2026-11-07
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 · 23
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:xen:xen:3.3.0:*:*:*:*:*:*:* | 3.3.0 | Vulnerable | Xen |
| cpe:2.3:o:xen:xen:3.3.1:*:*:*:*:*:*:* | 3.3.1 | Vulnerable | Xen |
| cpe:2.3:o:xen:xen:3.3.2:*:*:*:*:*:*:* | 3.3.2 | Vulnerable | Xen |
| cpe:2.3:o:xen:xen:3.4.0:*:*:*:*:*:*:* | 3.4.0 | Vulnerable | Xen |
| cpe:2.3:o:xen:xen:3.4.1:*:*:*:*:*:*:* | 3.4.1 | Vulnerable | Xen |
| cpe:2.3:o:xen:xen:3.4.2:*:*:*:*:*:*:* | 3.4.2 | Vulnerable | Xen |
| cpe:2.3:o:xen:xen:3.4.3:*:*:*:*:*:*:* | 3.4.3 | Vulnerable | Xen |
| cpe:2.3:o:xen:xen:3.4.4:*:*:*:*:*:*:* | 3.4.4 | Vulnerable | Xen |
| cpe:2.3:o:xen:xen:4.0.0:*:*:*:*:*:*:* | 4.0.0 | Vulnerable | Xen |
| cpe:2.3:o:xen:xen:4.0.1:*:*:*:*:*:*:* | 4.0.1 | Vulnerable | Xen |
- cpe:2.3:o:xen:xen:3.3.0:*:*:*:*:*:*:* Versions 3.3.0 Vulnerable ·Xen
- cpe:2.3:o:xen:xen:3.3.1:*:*:*:*:*:*:* Versions 3.3.1 Vulnerable ·Xen
- cpe:2.3:o:xen:xen:3.3.2:*:*:*:*:*:*:* Versions 3.3.2 Vulnerable ·Xen
- cpe:2.3:o:xen:xen:3.4.0:*:*:*:*:*:*:* Versions 3.4.0 Vulnerable ·Xen
- cpe:2.3:o:xen:xen:3.4.1:*:*:*:*:*:*:* Versions 3.4.1 Vulnerable ·Xen
- cpe:2.3:o:xen:xen:3.4.2:*:*:*:*:*:*:* Versions 3.4.2 Vulnerable ·Xen
- cpe:2.3:o:xen:xen:3.4.3:*:*:*:*:*:*:* Versions 3.4.3 Vulnerable ·Xen
- cpe:2.3:o:xen:xen:3.4.4:*:*:*:*:*:*:* Versions 3.4.4 Vulnerable ·Xen
- cpe:2.3:o:xen:xen:4.0.0:*:*:*:*:*:*:* Versions 4.0.0 Vulnerable ·Xen
- cpe:2.3:o:xen:xen:4.0.1:*:*:*:*:*:*:* Versions 4.0.1 Vulnerable ·Xen
Show 13 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:xen:xen:4.0.2:*:*:*:*:*:*:* | 4.0.2 | Vulnerable | Xen |
| cpe:2.3:o:xen:xen:4.0.3:*:*:*:*:*:*:* | 4.0.3 | Vulnerable | Xen |
| cpe:2.3:o:xen:xen:4.0.4:*:*:*:*:*:*:* | 4.0.4 | Vulnerable | Xen |
| cpe:2.3:o:xen:xen:4.1.0:*:*:*:*:*:*:* | 4.1.0 | Vulnerable | Xen |
| cpe:2.3:o:xen:xen:4.1.1:*:*:*:*:*:*:* | 4.1.1 | Vulnerable | Xen |
| cpe:2.3:o:xen:xen:4.1.2:*:*:*:*:*:*:* | 4.1.2 | Vulnerable | Xen |
| cpe:2.3:o:xen:xen:4.1.3:*:*:*:*:*:*:* | 4.1.3 | Vulnerable | Xen |
| cpe:2.3:o:xen:xen:4.1.4:*:*:*:*:*:*:* | 4.1.4 | Vulnerable | Xen |
| cpe:2.3:o:xen:xen:4.1.5:*:*:*:*:*:*:* | 4.1.5 | Vulnerable | Xen |
| cpe:2.3:o:xen:xen:4.2.0:*:*:*:*:*:*:* | 4.2.0 | Vulnerable | Xen |
| cpe:2.3:o:xen:xen:4.2.1:*:*:*:*:*:*:* | 4.2.1 | Vulnerable | Xen |
| cpe:2.3:o:xen:xen:4.2.2:*:*:*:*:*:*:* | 4.2.2 | Vulnerable | Xen |
| cpe:2.3:o:xen:xen:4.3.0:*:*:*:*:*:*:* | 4.3.0 | Vulnerable | Xen |
- cpe:2.3:o:xen:xen:4.0.2:*:*:*:*:*:*:* Versions 4.0.2 Vulnerable ·Xen
- cpe:2.3:o:xen:xen:4.0.3:*:*:*:*:*:*:* Versions 4.0.3 Vulnerable ·Xen
- cpe:2.3:o:xen:xen:4.0.4:*:*:*:*:*:*:* Versions 4.0.4 Vulnerable ·Xen
- cpe:2.3:o:xen:xen:4.1.0:*:*:*:*:*:*:* Versions 4.1.0 Vulnerable ·Xen
- cpe:2.3:o:xen:xen:4.1.1:*:*:*:*:*:*:* Versions 4.1.1 Vulnerable ·Xen
- cpe:2.3:o:xen:xen:4.1.2:*:*:*:*:*:*:* Versions 4.1.2 Vulnerable ·Xen
- cpe:2.3:o:xen:xen:4.1.3:*:*:*:*:*:*:* Versions 4.1.3 Vulnerable ·Xen
- cpe:2.3:o:xen:xen:4.1.4:*:*:*:*:*:*:* Versions 4.1.4 Vulnerable ·Xen
- cpe:2.3:o:xen:xen:4.1.5:*:*:*:*:*:*:* Versions 4.1.5 Vulnerable ·Xen
- cpe:2.3:o:xen:xen:4.2.0:*:*:*:*:*:*:* Versions 4.2.0 Vulnerable ·Xen
- cpe:2.3:o:xen:xen:4.2.1:*:*:*:*:*:*:* Versions 4.2.1 Vulnerable ·Xen
- cpe:2.3:o:xen:xen:4.2.2:*:*:*:*:*:*:* Versions 4.2.2 Vulnerable ·Xen
- cpe:2.3:o:xen:xen:4.3.0:*:*:*:*:*:*:* Versions 4.3.0 Vulnerable ·Xen
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
Not affected: 4 products
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise MRG 2
Timeline
- 2026-10-02 Threatist record created from CVE-2013-4361
- 2026-10-03 Alias added: GHSA-jmgg-m7r5-7296
References
More Xen vulnerabilities
- TI-2012-00210 The x86-64 kernel system-call functionality in Xen 4.1.2 and earlier, as used in Citrix… CVSS 2.0HIGH 7.2
- TI-2023-07042 Information disclosure through error messages in AMD Ryzen™ 3000 Series Desktop… CVSS 3.1MEDIUM 5.5
- TI-2015-04333 The C+ mode offload emulation in the RTL8139 network card device model in QEMU, as used… CVSS 2.0HIGH 9.3
- TI-2015-06741 The KVM subsystem in the Linux kernel through 4.2.6, and Xen 4.3.x through 4.6.x, allows… CVSS 3.1CRITICAL 10.0
- TI-2018-06436 A statement in the System Programming Guide of the Intel 64 and IA-32 Architectures… CVSS 3.0HIGH 7.8
- TI-2024-20522 x86: Incorrect logic for BTC/SRSO mitigations CVSS 3.1HIGH 7.5
Sources
- CVE-2013-4361 · CVE Program
- CVE-2013-4361 · NVD
- FIRST EPSS
- GHSA-jmgg-m7r5-7296 · GitHub Advisory Database · CC BY 4.0
- CVE-2013-4361 · 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