CVE-2026-23555

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-23555
Any guest issuing a Xenstore command accessing a node using the (illegal) node path "/local/domain/", will crash xenstored due to a clobbered error indicator in xenstored when verifying the node path. Note that the crash is forced via a failing assert() statement in xenstored. In case xenstored is being built with NDEBUG #defined, an unprivileged guest trying to access the node path "/local/domain/" will result in it no longer being serviced by xenstored, other guests (including dom0) will still be serviced, but xenstored will use up all cpu time it can get.

7.1 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 2.5 / Impact : 4.0

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope CHANGED

References
Link Resource
https://xenbits.xenproject.org/xsa/advisory-481.html Patch Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/03/17/7 Mailing List Patch Third Party Advisory
http://xenbits.xen.org/xsa/advisory-481.html Patch Vendor Advisory
Configurations

Configuration 1 (hide)

cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:*
History

10 Apr 2026, 20:38

Type Values Removed Values Added
References () https://xenbits.xenproject.org/xsa/advisory-481.html - () https://xenbits.xenproject.org/xsa/advisory-481.html - Patch, Vendor Advisory
References () http://www.openwall.com/lists/oss-security/2026/03/17/7 - () http://www.openwall.com/lists/oss-security/2026/03/17/7 - Mailing List, Patch, Third Party Advisory
References () http://xenbits.xen.org/xsa/advisory-481.html - () http://xenbits.xen.org/xsa/advisory-481.html - Patch, Vendor Advisory
Summary
  • (es) Cualquier invitado que emita un comando de Xenstore accediendo a un nodo utilizando la ruta de nodo (ilegal) '/local/domain/', provocará la caída de xenstored debido a un indicador de error sobrescrito en xenstored al verificar la ruta del nodo. Tenga en cuenta que la caída es forzada mediante una instrucción assert() fallida en xenstored. En caso de que xenstored se compile con NDEBUG #definido, un invitado sin privilegios que intente acceder a la ruta del nodo '/local/domain/' resultará en que ya no sea atendido por xenstored, otros invitados (incluido dom0) seguirán siendo atendidos, pero xenstored consumirá todo el tiempo de CPU que pueda obtener.
CPE cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:*
First Time Xen
Xen xen

23 Mar 2026, 15:16

Type Values Removed Values Added
CWE CWE-617
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.1

23 Mar 2026, 08:16

Type Values Removed Values Added
References
  • () http://www.openwall.com/lists/oss-security/2026/03/17/7 -
  • () http://xenbits.xen.org/xsa/advisory-481.html -

23 Mar 2026, 07:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-03-23 07:16

Updated : 2026-04-10 20:38

NVD link : CVE-2026-23555

Mitre link : CVE-2026-23555

CVE.ORG link : CVE-2026-23555

JSON object : View

Products Affected

xen

  • xen
CWE
CWE-617

Reachable Assertion