Xen, when running on a 64-bit hypervisor, allows local x86 guest OS users to modify…
Priority LOW 39CWE-20Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Will not fix Red Hat: no fix planned
Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat.
Summary
Xen, when running on a 64-bit hypervisor, allows local x86 guest OS users to modify arbitrary memory and consequently obtain sensitive information, cause a denial of service (host crash), or execute arbitrary code on the host by leveraging broken emulation of bit test instructions.
Why it matters now
EPSS 0.00505 43rd percentileScored 2026-11-07
Fix Will not fix Red Hat: no fix planned
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 · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:* | all versions | Vulnerable | Xen |
| cpe:2.3:a:citrix:xenserver:6.0.2:*:*:*:*:*:*:* | 6.0.2 | Vulnerable | Citrix |
| cpe:2.3:a:citrix:xenserver:6.2.0:*:*:*:*:*:*:* | 6.2.0 | Vulnerable | Citrix |
| cpe:2.3:a:citrix:xenserver:6.5:*:*:*:*:*:*:* | 6.5 | Vulnerable | Citrix |
| cpe:2.3:a:citrix:xenserver:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Citrix |
- cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Xen
- cpe:2.3:a:citrix:xenserver:6.0.2:*:*:*:*:*:*:* Versions 6.0.2 Vulnerable ·Citrix
- cpe:2.3:a:citrix:xenserver:6.2.0:*:*:*:*:*:*:* Versions 6.2.0 Vulnerable ·Citrix
- cpe:2.3:a:citrix:xenserver:6.5:*:*:*:*:*:*:* Versions 6.5 Vulnerable ·Citrix
- cpe:2.3:a:citrix:xenserver:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Citrix
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 5 | Affected | No fix planned: Will not fix |
Timeline
- 2026-10-02 Threatist record created from CVE-2016-9383
- 2026-10-03 Alias added: GHSA-qw22-r72h-rf56
References
Sources
- CVE-2016-9383 · CVE Program
- CVE-2016-9383 · NVD
- FIRST EPSS
- GHSA-qw22-r72h-rf56 · GitHub Advisory Database · CC BY 4.0
- CVE-2016-9383 · 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