Medium severity6.5NVD Advisory· Published May 19, 2026· Updated May 19, 2026
CVE-2026-23557
CVE-2026-23557
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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Affected products
3Patches
Vulnerability mechanics
References
3- www.openwall.com/lists/oss-security/2026/04/28/11nvdMailing ListPatchThird Party Advisory
- xenbits.xen.org/xsa/advisory-484.htmlnvdPatchVendor Advisory
- xenbits.xenproject.org/xsa/advisory-484.htmlnvdPatchVendor Advisory
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