An issue was discovered in Xen through 4.11.x on AMD x86 platforms, possibly allowing…
Priority LOW 34CWE-459Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- High
- 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
An issue was discovered in Xen through 4.11.x on AMD x86 platforms, possibly allowing guest OS users to gain host OS privileges because TLB flushes do not always occur after IOMMU mapping changes.
Why it matters now
EPSS 0.00409 35th 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 4.11.1 | Vulnerable | Xen |
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Debian |
| cpe:2.3:a:citrix:xenserver:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Citrix |
| cpe:2.3:a:citrix:xenserver:7.1:cu1:*:*:ltsr:*:*:* | 7.1 cu1 | Vulnerable | Citrix |
| cpe:2.3:a:citrix:xenserver:7.5:*:*:*:*:*:*:* | 7.5 | Vulnerable | Citrix |
| cpe:2.3:a:citrix:xenserver:7.6:*:*:*:*:*:*:* | 7.6 | Vulnerable | Citrix |
- cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:* Versions up to 4.11.1 Vulnerable ·Xen
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
- cpe:2.3:a:citrix:xenserver:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Citrix
- cpe:2.3:a:citrix:xenserver:7.1:cu1:*:*:ltsr:*:*:* Versions 7.1 cu1 Vulnerable ·Citrix
- cpe:2.3:a:citrix:xenserver:7.5:*:*:*:*:*:*:* Versions 7.5 Vulnerable ·Citrix
- cpe:2.3:a:citrix:xenserver:7.6:*:*:*:*:*:*:* Versions 7.6 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-2018-19961
- 2026-10-03 Alias added: GHSA-qwxp-946x-p86v
References
Sources
- CVE-2018-19961 · CVE Program
- CVE-2018-19961 · NVD
- FIRST EPSS
- GHSA-qwxp-946x-p86v · GitHub Advisory Database · CC BY 4.0
- CVE-2018-19961 · 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