Division Error in Viridian STIMER Logic in Xen Controls by Xen Project
CVE-2026-62431

7.5HIGH

Key Information:

Vendor

Xen Project
Status
Xen Project
Vendor
CVE Published:
28 July 2026

What is CVE-2026-62431?

A vulnerability exists within the handling of periodic Viridian STIMERs in Xen controls due to improper validation of a user-controlled divisor value. This oversight allows an attacker to set the divisor to zero, triggering a #DE fault that could disrupt normal operations or allow for further exploits. Attention to this flaw is critical for maintaining system integrity and preventing potential denial of service conditions.

Affected Version(s)

Xen consult Xen advisory XSA-504

References

https://xenbits.xenproject.org/xsa/advisory-504.html

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.