https://seclists.org/oss-sec/2026/q1/328: Xen Security Advisory 481 v2 (CVE-2026-23555) - Xenstod DoS by unprivileged domain
Published Mar 17, 2026
·Updated
Affected Software
1 affected component
Xen Project Xen>=4.18
Frequently Asked Questions
1
What is the severity of CVE-2026-23555?
The severity of CVE-2026-23555 is considered medium due to the potential for denial of service by unprivileged domains.
2
How do I fix CVE-2026-23555?
To fix CVE-2026-23555, users should update to the latest version of Xen that addresses this vulnerability.
3
What types of systems are affected by CVE-2026-23555?
CVE-2026-23555 affects systems running the Xen Project and its Xenstored service.
4
Can CVE-2026-23555 be exploited remotely?
Yes, CVE-2026-23555 can potentially be exploited by unprivileged domains on the same Xen host.
5
What mitigation strategies exist for CVE-2026-23555?
Mitigation strategies for CVE-2026-23555 include limiting access to Xenstore commands and monitoring for unusual activity.