Xen Hypervisor: Multiple security vulnerabilities (CVE-2026-100080, CVE-2026-100081, CVE-2026-100082)
Multiple vulnerabilities in the Xen hypervisor allow for privilege escalation, information disclosure, and denial-of-service, necessitating immediate patching.
CVE search metadata
CVE search record: CVE-2026-100080. EPSS: 0.27%. KEV: no. Product: Xen (< latest patch). Brief: Xen Hypervisor: Multiple security vulnerabilities (CVE-2026-100080, CVE-2026-100081, CVE-2026-100082). Brief link: https://feed.craftedsignal.io/briefs/2026-11-xen-vulnerabilities-3a65c069/
CVE search record: CVE-2026-100081. EPSS: 0.24%. KEV: no. Product: Xen (< latest patch). Brief: Xen Hypervisor: Multiple security vulnerabilities (CVE-2026-100080, CVE-2026-100081, CVE-2026-100082). Brief link: https://feed.craftedsignal.io/briefs/2026-11-xen-vulnerabilities-3a65c069/
CVE search record: CVE-2026-100082. EPSS: 0.24%. KEV: no. Product: Xen (< latest patch). Brief: Xen Hypervisor: Multiple security vulnerabilities (CVE-2026-100080, CVE-2026-100081, CVE-2026-100082). Brief link: https://feed.craftedsignal.io/briefs/2026-11-xen-vulnerabilities-3a65c069/
Triage facts
Revision 1- Applicability
- Xen (< latest patch)
- Evidence
- Unknown
- Severity
- High
- Action
- Elevated
- Sources
- 7 public sources
- Freshness
- Revision 1Nov 9, 16:12 UTC
- Vulnerabilities
- 3 CVEs
- Source quality
- A1Roughly even chance
The Xen Project has released security advisories (XSA-526, XSA-527, XSA-528) addressing multiple vulnerabilities affecting all versions of the Xen hypervisor prior to the latest security updates. These flaws can lead to privilege escalation, unauthorized access to sensitive information, and denial-of-service conditions. No technical details on exploitation vectors are currently disclosed; administrators should apply the patches referenced in the official advisories immediately.
Impact
The identified vulnerabilities can result in privilege escalation, compromise of data confidentiality, and system-wide denial-of-service attacks.
Recommendation
- Inventory all systems running the Xen hypervisor.
- Review the official Xen security advisories for XSA-526, XSA-527, and XSA-528 to identify affected versions within the environment.
- Apply security patches provided by the distribution vendor or the Xen project immediately.
Immediate actions
Patch all instances of Xen hypervisor
Mitigations
Apply Xen security patches released in XSA-526, XSA-527, and XSA-528
CVE-2026-100080, CVE-2026-100081, CVE-2026-100082