CVE-2026-23557 — Xenstored DoS via XS_RESET_WATCHES command

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
Xen / Xen	unknown consult Xen advisory XSA-484

CWE

No CWE identifiers supplied.

References

https://xenbits.xenproject.org/xsa/advisory-484.html

ADP enrichment

CVE

No English description supplied.

http://www.openwall.com/lists/oss-security/2026/04/28/11
http://xenbits.xen.org/xsa/advisory-484.html

CISA-ADP

No English description supplied.

No references supplied.