CVE-2026-23557 Xenstored DoS via XS_RESET_WATCHES command

Any guest can cause xenstored to crash by issuing a XSRESETWATCHES 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 xenstore...

CVE-2026-23557

The Xen hypervisor is vulnerable to a Denial of Service (DoS) attack where any guest can cause xenstored to crash. The root cause is an assert() triggering when processing the XS_RESET_WATCHES command within a transaction. This issue does not affect builds where NDEBUG is defined. Remediation inc...

Linux Distros Unpatched Vulnerability : CVE-2026-23557

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Any guest can cause xenstored to crash by issuing a XSRESETWATCHES command within a transaction due to an assert triggering. In case xenstored was built with...

SUSE CVE-2026-23557

Any guest can cause xenstored to crash by issuing a XSRESETWATCHES 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 xenstore...