#VU124114 Reachable assertion in Xen - CVE-2026-23555
Published: March 18, 2026
Vulnerability identifier: #VU124114
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:H/E:U/U:Clear
CVE-ID: CVE-2026-23555
CWE-ID: CWE-617
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Xen
Xen
Software vendor:
Xen Project
Xen Project
Description
The vulnerability allows a local user to perform a denial of service attack.
The vulnerability exists due to improper input validation in xenstored when processing Xenstore commands with the node path of "/local/domain/". A local user can send a specially crafted request containing this illegal path to crash xenstored or force it into an infinite loop, resulting in a denial of service for Xenstore operations.
Exploitation does not require guest privileges beyond the ability to issue Xenstore commands. The vulnerability affects systems using the C variant of xenstored; systems using oxenstored or xenstore-stubdom are not affected.
Remediation
Install updates from vendor's website.