Xen PV guest before Xen 4.3 checked access permissions to MMIO ranges only after…
Priority LOW 18CWE-200Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- Will not fix Red Hat: no fix planned
Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-200.
Summary
Xen PV guest before Xen 4.3 checked access permissions to MMIO ranges only after accessing them, allowing host PCI device space memory reads, leading to information disclosure. This is an error in the get_user function. NOTE: the upstream Xen Project considers versions before 4.5.x to be EOL.
Why it matters now
EPSS 0.00368 30th 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 · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:* | up to 4.2.5 | Vulnerable | Xen |
| cpe:2.3:a:suse:manager:2.1:*:*:*:*:*:*:* | 2.1 | Vulnerable | SUSE |
| cpe:2.3:a:suse:manager_proxy:2.1:*:*:*:*:*:*:* | 2.1 | Vulnerable | SUSE |
| cpe:2.3:a:suse:openstack_cloud:5:*:*:*:*:*:*:* | 5 | Vulnerable | SUSE |
| cpe:2.3:o:novell:suse_linux_enterprise_point_of_sale:11.0:sp3:*:*:*:*:*:* | 11.0 sp3 | Vulnerable | Novell |
| cpe:2.3:o:novell:suse_linux_enterprise_server:11.0:sp3:*:*:ltss:*:*:* | 11.0 sp3 | Vulnerable | Novell |
- cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:* Versions up to 4.2.5 Vulnerable ·Xen
- cpe:2.3:a:suse:manager:2.1:*:*:*:*:*:*:* Versions 2.1 Vulnerable ·SUSE
- cpe:2.3:a:suse:manager_proxy:2.1:*:*:*:*:*:*:* Versions 2.1 Vulnerable ·SUSE
- cpe:2.3:a:suse:openstack_cloud:5:*:*:*:*:*:*:* Versions 5 Vulnerable ·SUSE
- cpe:2.3:o:novell:suse_linux_enterprise_point_of_sale:11.0:sp3:*:*:*:*:*:* Versions 11.0 sp3 Vulnerable ·Novell
- cpe:2.3:o:novell:suse_linux_enterprise_server:11.0:sp3:*:*:ltss:*:*:* Versions 11.0 sp3 Vulnerable ·Novell
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Low. 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-2017-7995
- 2026-10-03 Alias added: GHSA-x43f-7h79-3278
References
Sources
- CVE-2017-7995 · CVE Program
- CVE-2017-7995 · NVD
- FIRST EPSS
- GHSA-x43f-7h79-3278 · GitHub Advisory Database · CC BY 4.0
- CVE-2017-7995 · 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