CVE-2026-23556 CRITICAL

CVE-2026-23556: oxenstored keeps quota related use counts across domain destruction

Vendor Xen
Product oxenstored
Weakness CWE-281
Published July 9, 2026
Last update July 9, 2026
View on NVD All CVEs

CVSS base score

9.4/10
Attack vector Local
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

What the vulnerability does

01Description

When oxenstored is tearing a domain down, the node data is cleaned up but the usage counts are leaked. When the domain ID is eventually reused, the new domain can create fewer nodes before beeing deemed to be over quota.

Key dates

02Disclosure timeline

July 9, 2026 CVE published
July 9, 2026 Record updated