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TI-2015-07038 Aliases CVE-2015-8555GHSA-ffhp-28g8-p5m9

Xen 4.6.x, 4.5.x, 4.4.x, 4.3.x, and earlier do not initialize x86 FPU stack and XMM…

Priority MEDIUM 42CWE-200Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · 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 4.6.x, 4.5.x, 4.4.x, 4.3.x, and earlier do not initialize x86 FPU stack and XMM registers when XSAVE/XRSTOR are not used to manage guest extended register state, which allows local guest domains to obtain sensitive information from other domains via unspecified vectors.

Why it matters now

EPSS 0.02254 83rd 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

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 17

CPEVersionsRoleVendor
cpe:2.3:a:citrix:xenserver:6.0:*:*:*:*:*:*:*6.0VulnerableCitrix
cpe:2.3:o:xen:xen:4.3.0:*:*:*:*:*:*:*4.3.0VulnerableXen
cpe:2.3:o:xen:xen:4.3.1:*:*:*:*:*:*:*4.3.1VulnerableXen
cpe:2.3:o:xen:xen:4.3.2:*:*:*:*:*:*:*4.3.2VulnerableXen
cpe:2.3:o:xen:xen:4.3.3:*:*:*:*:*:*:*4.3.3VulnerableXen
cpe:2.3:o:xen:xen:4.3.4:*:*:*:*:*:*:*4.3.4VulnerableXen
cpe:2.3:o:xen:xen:4.4.0:*:*:*:*:*:*:*4.4.0VulnerableXen
cpe:2.3:o:xen:xen:4.4.1:*:*:*:*:*:*:*4.4.1VulnerableXen
cpe:2.3:o:xen:xen:4.4.2:*:*:*:*:*:*:*4.4.2VulnerableXen
cpe:2.3:o:xen:xen:4.4.3:*:*:*:*:*:*:*4.4.3VulnerableXen
  • cpe:2.3:a:citrix:xenserver:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Citrix
  • cpe:2.3:o:xen:xen:4.3.0:*:*:*:*:*:*:* Versions 4.3.0 Vulnerable ·Xen
  • cpe:2.3:o:xen:xen:4.3.1:*:*:*:*:*:*:* Versions 4.3.1 Vulnerable ·Xen
  • cpe:2.3:o:xen:xen:4.3.2:*:*:*:*:*:*:* Versions 4.3.2 Vulnerable ·Xen
  • cpe:2.3:o:xen:xen:4.3.3:*:*:*:*:*:*:* Versions 4.3.3 Vulnerable ·Xen
  • cpe:2.3:o:xen:xen:4.3.4:*:*:*:*:*:*:* Versions 4.3.4 Vulnerable ·Xen
  • cpe:2.3:o:xen:xen:4.4.0:*:*:*:*:*:*:* Versions 4.4.0 Vulnerable ·Xen
  • cpe:2.3:o:xen:xen:4.4.1:*:*:*:*:*:*:* Versions 4.4.1 Vulnerable ·Xen
  • cpe:2.3:o:xen:xen:4.4.2:*:*:*:*:*:*:* Versions 4.4.2 Vulnerable ·Xen
  • cpe:2.3:o:xen:xen:4.4.3:*:*:*:*:*:*:* Versions 4.4.3 Vulnerable ·Xen
Show 7 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:xen:xen:4.4.4:*:*:*:*:*:*:*4.4.4VulnerableXen
cpe:2.3:o:xen:xen:4.5.0:*:*:*:*:*:*:*4.5.0VulnerableXen
cpe:2.3:o:xen:xen:4.5.1:*:*:*:*:*:*:*4.5.1VulnerableXen
cpe:2.3:o:xen:xen:4.5.2:*:*:*:*:*:*:*4.5.2VulnerableXen
cpe:2.3:o:xen:xen:4.5.3:*:*:*:*:*:*:*4.5.3VulnerableXen
cpe:2.3:o:xen:xen:4.6.0:*:*:*:*:*:*:*4.6.0VulnerableXen
cpe:2.3:o:xen:xen:4.6.1:*:*:*:*:*:*:*4.6.1VulnerableXen
  • cpe:2.3:o:xen:xen:4.4.4:*:*:*:*:*:*:* Versions 4.4.4 Vulnerable ·Xen
  • cpe:2.3:o:xen:xen:4.5.0:*:*:*:*:*:*:* Versions 4.5.0 Vulnerable ·Xen
  • cpe:2.3:o:xen:xen:4.5.1:*:*:*:*:*:*:* Versions 4.5.1 Vulnerable ·Xen
  • cpe:2.3:o:xen:xen:4.5.2:*:*:*:*:*:*:* Versions 4.5.2 Vulnerable ·Xen
  • cpe:2.3:o:xen:xen:4.5.3:*:*:*:*:*:*:* Versions 4.5.3 Vulnerable ·Xen
  • cpe:2.3:o:xen:xen:4.6.0:*:*:*:*:*:*:* Versions 4.6.0 Vulnerable ·Xen
  • cpe:2.3:o:xen:xen:4.6.1:*:*:*:*:*:*:* Versions 4.6.1 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 →

ProductStatusPlan or fix
Red Hat Enterprise Linux 5AffectedNo fix planned: Will not fix

Timeline

  1. 2026-10-02 Threatist record created from CVE-2015-8555
  2. 2026-10-03 Alias added: GHSA-ffhp-28g8-p5m9

References

Patch 1

Advisory 2

Other 2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences