CVE-2026-23555
Any guest issuing a Xenstore command accessing a node using the
(illegal) node path "/local/domain/", will crash xenstor
Any guest issuing a Xenstore command accessing a node using the (illegal) node path "/local/domain/", will crash xenstored due to a clobbered error indicator in xenstored when verifying the node path. Note that the crash is forced via a failing assert() statement in xenstored. In case xenstored is being built with NDEBUG #defined, an unprivileged guest trying to access the node path "/local/domain/" will result in it no longer being serviced by xenstored, other guests (including dom0) will still be serviced, but xenstored will use up all cpu time it can get.
HIGH · CVSS 7.1
EPSS 6e-05
Schedule remediation
- CVSS base score ≥ 7.0
Sigma rules0
YARA rules0