Xen Vulnerability Affects PCI Device Assignments
CVE-2026-79602

8.8HIGH

Key Information:

Vendor

Xen Project
Status
Xen Project
Vendor
CVE Published:
8 September 2026

What is CVE-2026-79602?

A flaw exists in the Xen Hypervisor related to the assignment of PCI devices with a Base Address Register (BAR) in the input/output (IO) port space. This vulnerability allows an attacker with access to a guest system to exploit the condition, leading to the triggering of a BUG() in the Xen hypervisor. Such exploitation may compromise the stability and security of the host system.

Affected Version(s)

Xen consult Xen advisory XSA-510

References

https://xenbits.xenproject.org/xsa/advisory-510.html

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

This issue was discovered by Jiqian Chen of AMD and diagnosed as a security issue by Roger Pau Monné of AMD.
.