CVE-2026-23557

6.5 MEDIUM
Published: May 19, 2026 Modified: May 19, 2026
View on NVD

Description

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://xenbits.xenproject.org/xsa/advisory-484.html
Source: security@xen.org
Patch Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/04/28/11
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Patch Third Party Advisory
http://xenbits.xen.org/xsa/advisory-484.html
Source: af854a3a-2127-422b-91ae-364da2661108
Patch Vendor Advisory

3 reference(s) from NVD

Quick Stats

CVSS v3 Score
6.5 / 10.0
EPSS (Exploit Probability)
0.2%
5th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

xen