CVE-2026-23557 (GCVE-0-2026-23557)

Vulnerability from cvelistv5 – Published: 2026-05-19 12:49 – Updated: 2026-05-19 14:42
VLAI?
Title
Xenstored DoS via XS_RESET_WATCHES command
Summary
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.
Severity ?
6.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
CWE
Assigner
XEN
References
Impacted products
Vendor Product Version
Xen Xen Unknown: consult Xen advisory XSA-484
Create a notification for this product.
Credits
This issue was discovered by Andrii Sultanov of Vates.
Show details on NVD website
To clipboard 

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            "url": "http://www.openwall.com/lists/oss-security/2026/04/28/11"
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            "url": "http://xenbits.xen.org/xsa/advisory-484.html"
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              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
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      "descriptions": [
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    "dateReserved": "2026-01-14T13:07:36.961Z",
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