Resource exhaustion in Xen - CVE-2026-79604
Published: September 8, 2026
Vulnerability identifier: #VU147396
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-79604
CWE-ID: CWE-400
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to uncontrolled resource consumption in oxenstored when handling xenbus reconnect requests. A local user can repeatedly request xenbus reconnects to cause a denial of service.
Only systems using the Ocaml Xenstored implementation are affected.
Affected software
Xen
How to mitigate CVE-2026-79604
Install security update from vendor's website.