CVE-2026-23555 — Reachable Assertion in XEN
Severity
7.1HIGHNVD
EPSS
0.0%
top 96.73%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedMar 23
Description
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 stil…
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:HExploitability: 2.5 | Impact: 4.0
Affected Packages3 packages
Patches
🔴Vulnerability Details
3GHSA▶
GHSA-hv7f-mhvh-6mf6: Any guest issuing a Xenstore command accessing a node using the
(illegal) node path "/local/domain/", will crash xenstored due to a
clobbered error in↗2026-03-23
OSV▶
CVE-2026-23555: Any guest issuing a Xenstore command accessing a node using the (illegal) node path "/local/domain/", will crash xenstored due to a clobbered error in↗2026-03-23
OSV▶
CVE-2026-23555: Any guest issuing a Xenstore command accessing a node using the
(illegal) node path "/local/domain/", will crash xenstored due to a
clobbered error in↗2026-03-23
📋Vendor Advisories
1Debian▶
CVE-2026-23555: xen - Any guest issuing a Xenstore command accessing a node using the (illegal) node p...↗2026