CVE-2026-23557

Any guest can cause xenstored to crash by issuing a XS_RESET_WATCHES command within a transaction due to an assert() triggering. In case xenstored was built with NDEBUG #defined nothing bad will happen, as assert() is doing nothing in this case. Note that the default is not to define NDEBUG for xenstored builds even in release builds of Xen.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.0 / Impact : 4.0

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://xenbits.xenproject.org/xsa/advisory-484.html	Patch Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/04/28/11	Mailing List Patch Third Party Advisory
http://xenbits.xen.org/xsa/advisory-484.html	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-05-19 14:16

Updated : 2026-06-17 10:21

NVD link : CVE-2026-23557

Mitre link : CVE-2026-23557

CVE.ORG link : CVE-2026-23557

JSON object : View

Products Affected

xen

xen

CWE

CWE-617

Reachable Assertion

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